Change log for openssh package in Debian
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openssh (1:7.6p1-4) unstable; urgency=medium
* Move VCS to salsa.debian.org.
* Add a preseeding-only openssh-server/password-authentication debconf
template that can be used to disable password authentication (closes:
#878945).
-- Colin Watson <email address hidden> Sat, 10 Feb 2018 02:31:46 +0000
Available diffs
- diff from 1:7.5p1-10 to 1:7.6p1-4 (495.5 KiB)
- diff from 1:7.6p1-3 to 1:7.6p1-4 (1.6 KiB)
openssh (1:7.6p1-3) unstable; urgency=medium
[ Colin Watson ]
* Remove the decade-old ssh-krb5 transitional package; upgrades of
openssh-server will preserve existing configuration, and new
installations should just enable GSSAPIAuthentication and
GSSAPIKeyExchange in sshd_config (closes: #878626).
* Support the "noudeb" build profile.
* Fix putty-transfer regression test.
[ Anders Kaseorg ]
* debian/systemd/ssh-agent.service: Add missing dbus dependency.
[ Jason Duerstock ]
* Add a "pkg.openssh.nognome" build profile, which disables building the
ssh-askpass-gnome binary package and avoids the build-dependency on
libgtk-3-dev (closes: #883819).
-- Colin Watson <email address hidden> Tue, 16 Jan 2018 17:41:08 +0000
Available diffs
- diff from 1:7.6p1-2 to 1:7.6p1-3 (3.7 KiB)
| Published in jessie-release |
openssh (1:6.7p1-5+deb8u4) jessie; urgency=medium
* Test configuration before starting or reloading sshd under systemd
(closes: #865770).
* Make "--" before the hostname terminate argument processing after the
hostname too (closes: #873201).
-- Colin Watson <email address hidden> Sat, 18 Nov 2017 10:56:29 +0000
openssh (1:7.4p1-10+deb9u2) stretch; urgency=medium
* Test configuration before starting or reloading sshd under systemd
(closes: #865770).
* Adjust compatibility patterns for WinSCP to correctly identify versions
that implement only the legacy DH group exchange scheme (closes:
#877800).
* Make "--" before the hostname terminate argument processing after the
hostname too (closes: #873201).
-- Colin Watson <email address hidden> Sat, 18 Nov 2017 09:37:22 +0000
openssh (1:7.6p1-2) unstable; urgency=medium * Apply upstream patch to fix PermitOpen argument handling. -- Colin Watson <email address hidden> Sat, 07 Oct 2017 13:44:13 +0100
openssh (1:7.6p1-1) unstable; urgency=medium
* New upstream release (https://www.openssh.com/txt/release-7.6):
- SECURITY: sftp-server(8): In read-only mode, sftp-server was
incorrectly permitting creation of zero-length files. Reported by
Michal Zalewski.
- ssh(1): Delete SSH protocol version 1 support, associated
configuration options and documentation (LP: #1584321).
- ssh(1)/sshd(8): Remove support for the hmac-ripemd160 MAC.
- ssh(1)/sshd(8): Remove support for the arcfour, blowfish and CAST
ciphers.
- Refuse RSA keys <1024 bits in length and improve reporting for keys
that do not meet this requirement.
- ssh(1): Do not offer CBC ciphers by default.
- ssh(1): Add RemoteCommand option to specify a command in the ssh
config file instead of giving it on the client's command line. This
allows the configuration file to specify the command that will be
executed on the remote host.
- sshd(8): Add ExposeAuthInfo option that enables writing details of the
authentication methods used (including public keys where applicable)
to a file that is exposed via a $SSH_USER_AUTH environment variable in
the subsequent session.
- ssh(1): Add support for reverse dynamic forwarding. In this mode, ssh
will act as a SOCKS4/5 proxy and forward connections to destinations
requested by the remote SOCKS client. This mode is requested using
extended syntax for the -R and RemoteForward options and, because it
is implemented solely at the client, does not require the server be
updated to be supported.
- sshd(8): Allow LogLevel directive in sshd_config Match blocks.
- ssh-keygen(1): Allow inclusion of arbitrary string or flag certificate
extensions and critical options.
- ssh-keygen(1): Allow ssh-keygen to use a key held in ssh-agent as a CA
when signing certificates.
- ssh(1)/sshd(8): Allow IPQoS=none in ssh/sshd to not set an explicit
ToS/DSCP value and just use the operating system default.
- ssh-add(1): Add -q option to make ssh-add quiet on success.
- ssh(1): Expand the StrictHostKeyChecking option with two new settings.
The first "accept-new" will automatically accept hitherto-unseen keys
but will refuse connections for changed or invalid hostkeys. This is
a safer subset of the current behaviour of StrictHostKeyChecking=no.
The second setting "off", is a synonym for the current behaviour of
StrictHostKeyChecking=no: accept new host keys, and continue
connection for hosts with incorrect hostkeys. A future release will
change the meaning of StrictHostKeyChecking=no to the behaviour of
"accept-new".
- ssh(1): Add SyslogFacility option to ssh(1) matching the equivalent
option in sshd(8).
- ssh(1): Use HostKeyAlias if specified instead of hostname for matching
host certificate principal names.
- sftp(1): Implement sorting for globbed ls.
- ssh(1): Add a user@host prefix to client's "Permission denied"
messages, useful in particular when using "stacked" connections (e.g.
ssh -J) where it's not clear which host is denying.
- ssh(1): Accept unknown EXT_INFO extension values that contain \0
characters. These are legal, but would previously cause fatal
connection errors if received.
- sftp(1): Print '?' instead of incorrect link count (that the protocol
doesn't provide) for remote listings.
- ssh(1): Return failure rather than fatal() for more cases during
session multiplexing negotiations. Causes the session to fall back to
a non-mux connection if they occur.
- ssh(1): Mention that the server may send debug messages to explain
public key authentication problems under some circumstances.
- Translate OpenSSL error codes to better report incorrect passphrase
errors when loading private keys.
- sshd(8): Adjust compatibility patterns for WinSCP to correctly
identify versions that implement only the legacy DH group exchange
scheme (closes: #877800).
- ssh(1): Print the "Killed by signal 1" message only at LogLevel
verbose so that it is not shown at the default level; prevents it from
appearing during ssh -J and equivalent ProxyCommand configs.
- ssh-keygen(1): When generating all hostkeys (ssh-keygen -A), clobber
existing keys if they exist but are zero length. Zero-length keys
could previously be made if ssh-keygen failed or was interrupted part
way through generating them.
- ssh-keyscan(1): Avoid double-close() on file descriptors.
- sshd(8): Avoid reliance on shared use of pointers shared between
monitor and child sshd processes.
- sshd_config(8): Document available AuthenticationMethods.
- ssh(1): Avoid truncation in some login prompts.
- ssh(1): Make "--" before the hostname terminate argument processing
after the hostname too (closes: #873201).
- ssh-keygen(1): Switch from aes256-cbc to aes256-ctr for encrypting
new-style private keys.
- ssh(1): Warn and do not attempt to use keys when the public and
private halves do not match.
- sftp(1): Don't print verbose error message when ssh disconnects from
under sftp.
- sshd(8): Fix keepalive scheduling problem: prevent activity on a
forwarded port from preventing the keepalive from being sent.
- sshd(8): When started without root privileges, don't require the
privilege separation user or path to exist.
- ssh(1)/sshd(8): Correctness fix for channels implementation: accept
channel IDs greater than 0x7FFFFFFF.
- sshd(8): Expose list of completed authentication methods to PAM via
the SSH_AUTH_INFO_0 PAM environment variable.
- ssh(1)/sshd(8): Fix several problems in the tun/tap forwarding code,
mostly to do with host/network byte order confusion.
- sshd(8): Avoid Linux seccomp violations on ppc64le over the socketcall
syscall.
* Build-depend on debhelper (>= 9.20160709~) rather than dh-systemd.
* Change priorities of ssh and ssh-krb5 binary packages to optional, since
"Priority: extra" is now deprecated.
* Use HTTPS form of copyright-format URL.
* Adjust "Running sshd from inittab" instructions in README.Debian to
recommend using service(8) rather than calling the init script directly.
* Policy version 4.1.0.
* Adjust "Per-connection sshd instances with systemd" instructions in
README.Debian to recommend using a drop-in file rather than copying and
modifying the ssh.socket unit file.
-- Colin Watson <email address hidden> Fri, 06 Oct 2017 12:36:48 +0100
openssh (1:7.5p1-10) unstable; urgency=medium
* Tell haveged to create the pid file we expect.
* Give up and use systemctl to start haveged if running under systemd;
this shouldn't be necessary, but I can't seem to get things working in
the Ubuntu autopkgtest environment otherwise.
-- Colin Watson <email address hidden> Fri, 01 Sep 2017 11:17:19 +0100
Available diffs
- diff from 1:7.5p1-7ubuntu2 (in Ubuntu) to 1:7.5p1-10 (6.9 KiB)
- diff from 1:7.5p1-9 to 1:7.5p1-10 (1014 bytes)
openssh (1:7.5p1-9) unstable; urgency=medium
* Run debian/tests/regress with "set -x".
* Run haveged without "-w 1024", as setting the low water mark doesn't
seem possible in all autopkgtest virtualisation environments.
-- Colin Watson <email address hidden> Thu, 31 Aug 2017 13:23:04 +0100
Available diffs
- diff from 1:7.5p1-8 to 1:7.5p1-9 (640 bytes)
openssh (1:7.5p1-8) unstable; urgency=medium
* Drop openssh-client-ssh1, now built by a separate source package.
* Run haveged during autopkgtests to ensure that they have enough entropy
for key generation (LP: #1712921).
* Apply patches from https://bugzilla.mindrot.org/show_bug.cgi?id=2752 to
allow some extra syscalls for crypto cards on s390x (LP: #1686618).
-- Colin Watson <email address hidden> Mon, 28 Aug 2017 12:16:35 +0100
Available diffs
openssh (1:7.5p1-7) unstable; urgency=medium
* Fix spelling of RuntimeDirectoryMode (closes: #872976).
* Add RuntimeDirectory and RuntimeDirectoryMode to ssh@.service as well as
ssh.service (closes: #872978).
-- Colin Watson <email address hidden> Wed, 23 Aug 2017 12:12:59 +0100
openssh (1:7.5p1-6) unstable; urgency=medium
[ Colin Watson ]
* Test configuration before starting or reloading sshd under systemd
(closes: #865770).
* Create /run/sshd under systemd using RuntimeDirectory rather than
tmpfiles.d (thanks, Dmitry Smirnov; closes: #864190).
[ Dimitri John Ledkov ]
* Drop upstart system and user jobs (closes: #872851).
[ Chris Lamb ]
* Quote IP address in suggested "ssh-keygen -f" calls (closes: #872643).
-- Colin Watson <email address hidden> Wed, 23 Aug 2017 01:41:06 +0100
openssh (1:7.4p1-10+deb9u1) stretch; urgency=medium
* Fix incoming compression statistics (thanks, Russell Coker; closes:
#797964).
-- Colin Watson <email address hidden> Sun, 18 Jun 2017 01:11:26 +0100
openssh (1:7.5p1-5) unstable; urgency=medium * Upload to unstable. * Fix syntax error in debian/copyright. -- Colin Watson <email address hidden> Sun, 18 Jun 2017 12:08:42 +0100
| Superseded in sid-release |
openssh (1:7.4p1-11) unstable; urgency=medium
* Fix incoming compression statistics (thanks, Russell Coker; closes:
#797964).
-- Colin Watson <email address hidden> Tue, 06 Jun 2017 15:03:48 +0100
| Deleted in experimental-release (Reason: None provided.) |
openssh (1:7.5p1-4) experimental; urgency=medium
* Drop README.Debian section on privilege separation, as it's no longer
optional.
* Only call "initctl set-env" from agent-launch if $UPSTART_SESSION is set
(LP: #1689299).
* Fix incoming compression statistics (thanks, Russell Coker; closes:
#797964).
* Relicense debian/* under a two-clause BSD licence for bidirectional
compatibility with upstream, with permission from Matthew Vernon and
others.
-- Colin Watson <email address hidden> Tue, 06 Jun 2017 15:17:58 +0100
| Superseded in experimental-release |
openssh (1:7.5p1-3) experimental; urgency=medium
* Fix debian/adjust-openssl-dependencies to account for preferring
libssl1.0-dev.
* Adjust OpenSSL dependencies for openssh-client-ssh1 too.
* Fix purge failure when /etc/ssh has already somehow been removed
(LP: #1682817).
* Ensure that /etc/ssh exists before trying to create /etc/ssh/sshd_config
(LP: #1685022).
-- Colin Watson <email address hidden> Tue, 02 May 2017 13:51:27 +0100
Available diffs
- diff from 1:7.5p1-2 to 1:7.5p1-3 (1.2 KiB)
| Superseded in experimental-release |
openssh (1:7.5p1-2) experimental; urgency=medium * Add missing header on Linux/s390. * Fix syntax error on Linux/X32. -- Colin Watson <email address hidden> Sun, 02 Apr 2017 13:20:11 +0100
Available diffs
- diff from 1:7.4p1-10 to 1:7.5p1-2 (267.4 KiB)
| Superseded in experimental-release |
openssh (1:7.5p1-1) experimental; urgency=medium
* New upstream release (https://www.openssh.com/txt/release-7.5):
- SECURITY: ssh(1), sshd(8): Fix weakness in CBC padding oracle
countermeasures that allowed a variant of the attack fixed in OpenSSH
7.3 to proceed. Note that the OpenSSH client disables CBC ciphers by
default, sshd offers them as lowest-preference options and will remove
them by default entirely in the next release.
- This release deprecates the sshd_config UsePrivilegeSeparation option,
thereby making privilege separation mandatory (closes: #407754).
- The format of several log messages emitted by the packet code has
changed to include additional information about the user and their
authentication state. Software that monitors ssh/sshd logs may need
to account for these changes.
- ssh(1), sshd(8): Support "=-" syntax to easily remove methods from
algorithm lists, e.g. Ciphers=-*cbc.
- sshd(1): Fix NULL dereference crash when key exchange start messages
are sent out of sequence.
- ssh(1), sshd(8): Allow form-feed characters to appear in configuration
files.
- sshd(8): Fix regression in OpenSSH 7.4 support for the server-sig-algs
extension, where SHA2 RSA signature methods were not being correctly
advertised.
- ssh(1), ssh-keygen(1): Fix a number of case-sensitivity bugs in
known_hosts processing.
- ssh(1): Allow ssh to use certificates accompanied by a private key
file but no corresponding plain *.pub public key.
- ssh(1): When updating hostkeys using the UpdateHostKeys option, accept
RSA keys if HostkeyAlgorithms contains any RSA keytype. Previously,
ssh could ignore RSA keys when only the ssh-rsa-sha2-* methods were
enabled in HostkeyAlgorithms and not the old ssh-rsa method.
- ssh(1): Detect and report excessively long configuration file lines.
- Merge a number of fixes found by Coverity and reported via Redhat and
FreeBSD. Includes fixes for some memory and file descriptor leaks in
error paths.
- ssh(1), sshd(8): When logging long messages to stderr, don't truncate
"\r\n" if the length of the message exceeds the buffer.
- ssh(1): Fully quote [host]:port in generated ProxyJump/-J command-
line; avoid confusion over IPv6 addresses and shells that treat square
bracket characters specially.
- Fix various fallout and sharp edges caused by removing SSH protocol 1
support from the server, including the server banner string being
incorrectly terminated with only \n (instead of \r\n), confusing error
messages from ssh-keyscan, and a segfault in sshd if protocol v.1 was
enabled for the client and sshd_config contained references to legacy
keys.
- ssh(1), sshd(8): Free fd_set on connection timeout.
- sftp(1): Fix division by zero crash in "df" output when server returns
zero total filesystem blocks/inodes.
- ssh(1), ssh-add(1), ssh-keygen(1), sshd(8): Translate OpenSSL errors
encountered during key loading to more meaningful error codes.
- ssh-keygen(1): Sanitise escape sequences in key comments sent to
printf but preserve valid UTF-8 when the locale supports it.
- ssh(1), sshd(8): Return reason for port forwarding failures where
feasible rather than always "administratively prohibited".
- sshd(8): Fix deadlock when AuthorizedKeysCommand or
AuthorizedPrincipalsCommand produces a lot of output and a key is
matched early.
- ssh(1): Fix typo in ~C error message for bad port forward
cancellation.
- ssh(1): Show a useful error message when included config files can't
be opened.
- sshd_config(5): Repair accidentally-deleted mention of %k token in
AuthorizedKeysCommand.
- sshd(8): Remove vestiges of previously removed LOGIN_PROGRAM.
- ssh-agent(1): Relax PKCS#11 whitelist to include libexec and common
32-bit compatibility library directories.
- sftp-client(1): Fix non-exploitable integer overflow in SSH2_FXP_NAME
response handling.
- ssh-agent(1): Fix regression in 7.4 of deleting PKCS#11-hosted keys.
It was not possible to delete them except by specifying their full
physical path.
- sshd(8): Avoid sandbox errors for Linux S390 systems using an ICA
crypto coprocessor.
- sshd(8): Fix non-exploitable weakness in seccomp-bpf sandbox arg
inspection.
- ssh-keygen(1), ssh(1), sftp(1): Fix output truncation for various that
contain non-printable characters where the codeset in use is ASCII.
-- Colin Watson <email address hidden> Sun, 02 Apr 2017 02:58:01 +0100
openssh (1:7.4p1-10) unstable; urgency=medium
* Move privilege separation directory and PID file from /var/run/ to /run/
(closes: #760422, #856825).
* Unbreak Unix domain socket forwarding for root (closes: #858252).
-- Colin Watson <email address hidden> Thu, 30 Mar 2017 11:19:04 +0100
Available diffs
- diff from 1:7.4p1-9 to 1:7.4p1-10 (3.4 KiB)
openssh (1:7.4p1-9) unstable; urgency=medium
* Fix null pointer dereference in ssh-keygen; this fixes an autopkgtest
regression introduced in 1:7.4p1-8.
-- Colin Watson <email address hidden> Thu, 16 Mar 2017 13:43:15 +0000
Available diffs
- diff from 1:7.4p1-7 to 1:7.4p1-9 (2.4 KiB)
- diff from 1:7.4p1-8 to 1:7.4p1-9 (1.2 KiB)
openssh (1:7.4p1-8) unstable; urgency=medium
* Fix ssh-keygen -H accidentally corrupting known_hosts that contained
already-hashed entries (closes: #851734, LP: #1668093).
* Fix ssh-keyscan to correctly hash hosts with a port number (closes:
#857736, LP: #1670745).
-- Colin Watson <email address hidden> Tue, 14 Mar 2017 13:49:14 +0000
Available diffs
- diff from 1:7.4p1-7 to 1:7.4p1-8 (2.1 KiB)
openssh (1:7.4p1-7) unstable; urgency=medium
* Don't set "PermitRootLogin yes" on fresh installations (regression
introduced in 1:7.4p1-1; closes: #852781).
* Restore reading authorized_keys2 by default. Upstream seems to intend
to gradually phase this out, so don't assume that this will remain the
default forever. However, we were late in adopting the upstream
sshd_config changes, so it makes sense to extend the grace period
(closes: #852320).
-- Colin Watson <email address hidden> Sun, 05 Mar 2017 02:12:42 +0000
Available diffs
- diff from 1:7.4p1-6 to 1:7.4p1-7 (1.6 KiB)
openssh (1:7.4p1-6) unstable; urgency=medium
* Remove temporary file on exit from postinst (closes: #850275).
* Remove LOGIN_PROGRAM and LOGIN_NO_ENDOPT definitions, since UseLogin is
gone.
* Document sshd_config changes that may be needed following the removal of
protocol 1 support from sshd (closes: #851573).
* Remove ssh_host_dsa_key from HostKey default (closes: #850614).
* Fix rekeying failure with GSSAPI key exchange (thanks, Harald Barth;
closes: #819361, LP: #1608965).
-- Colin Watson <email address hidden> Mon, 16 Jan 2017 15:11:10 +0000
Available diffs
- diff from 1:7.4p1-5 to 1:7.4p1-6 (7.6 KiB)
openssh (1:7.4p1-5) unstable; urgency=medium * Create mux socket for regression tests in a temporary directory. * Work around clock_gettime kernel bug on Linux x32 (closes: #849923). -- Colin Watson <email address hidden> Tue, 03 Jan 2017 14:43:28 +0000
Available diffs
- diff from 1:7.3p1-3build1 (in Ubuntu) to 1:7.4p1-5 (589.0 KiB)
- diff from 1:7.4p1-4 to 1:7.4p1-5 (3.2 KiB)
openssh (1:7.4p1-4) unstable; urgency=medium
* Run regression tests inside annotate-output to try to diagnose timeout
issues.
* Make integrity tests more robust against timeouts in the case where the
first test in a series for a given MAC happens to modify the low bytes
of a packet length.
* Fix race conditions in forwarding tests.
-- Colin Watson <email address hidden> Mon, 02 Jan 2017 19:37:23 +0000
Available diffs
- diff from 1:7.4p1-3 to 1:7.4p1-4 (2.9 KiB)
openssh (1:7.4p1-3) unstable; urgency=medium
* Revert attempted hack around regress/forwarding.sh test failure, since
it doesn't seem to help.
* Run regression tests using 'sh -x' to try to get more information about
failures.
* Dump some useful log files if regression tests fail.
* Tweak regression test setup to cope with the case where some of the
source directory is unreadable by the openssh-tests user.
-- Colin Watson <email address hidden> Sat, 31 Dec 2016 02:48:17 +0000
Available diffs
- diff from 1:7.4p1-2 to 1:7.4p1-3 (1.1 KiB)
openssh (1:7.4p1-2) unstable; urgency=medium
* Attempt to hack around regress/forwarding.sh test failure in some
environments.
* Avoid calling into Kerberos libraries from ssh_gssapi_server_mechanisms
in the privsep monitor.
-- Colin Watson <email address hidden> Thu, 29 Dec 2016 12:02:12 +0000
Available diffs
- diff from 1:7.4p1-1 to 1:7.4p1-2 (6.3 KiB)
openssh (1:7.4p1-1) unstable; urgency=medium
* New upstream release (http://www.openssh.com/txt/release-7.4):
- ssh(1): Remove 3des-cbc from the client's default proposal. 64-bit
block ciphers are not safe in 2016 and we don't want to wait until
attacks like SWEET32 are extended to SSH. As 3des-cbc was the only
mandatory cipher in the SSH RFCs, this may cause problems connecting
to older devices using the default configuration, but it's highly
likely that such devices already need explicit configuration for key
exchange and hostkey algorithms already anyway.
- sshd(8): When a forced-command appears in both a certificate and an
authorized keys/principals command= restriction, sshd will now refuse
to accept the certificate unless they are identical. The previous
(documented) behaviour of having the certificate forced-command
override the other could be a bit confusing and error-prone.
- sshd(8): Remove the UseLogin configuration directive and support for
having /bin/login manage login sessions.
- CVE-2016-10009: ssh-agent(1): Will now refuse to load PKCS#11 modules
from paths outside a trusted whitelist (run-time configurable).
Requests to load modules could be passed via agent forwarding and an
attacker could attempt to load a hostile PKCS#11 module across the
forwarded agent channel: PKCS#11 modules are shared libraries, so this
would result in code execution on the system running the ssh-agent if
the attacker has control of the forwarded agent-socket (on the host
running the sshd server) and the ability to write to the filesystem of
the host running ssh-agent (usually the host running the ssh client)
(closes: #848714).
- CVE-2016-10010: sshd(8): When privilege separation is disabled,
forwarded Unix-domain sockets would be created by sshd(8) with the
privileges of 'root' instead of the authenticated user. This release
refuses Unix-domain socket forwarding when privilege separation is
disabled (Privilege separation has been enabled by default for 14
years) (closes: #848715).
- CVE-2016-10011: sshd(8): Avoid theoretical leak of host private key
material to privilege-separated child processes via realloc() when
reading keys. No such leak was observed in practice for normal-sized
keys, nor does a leak to the child processes directly expose key
material to unprivileged users (closes: #848716).
- CVE-2016-10012: sshd(8): The shared memory manager used by
pre-authentication compression support had a bounds checks that could
be elided by some optimising compilers. Additionally, this memory
manager was incorrectly accessible when pre-authentication compression
was disabled. This could potentially allow attacks against the
privileged monitor process from the sandboxed privilege-separation
process (a compromise of the latter would be required first). This
release removes support for pre-authentication compression from
sshd(8) (closes: #848717).
- SECURITY: sshd(8): Validate address ranges for AllowUser and DenyUsers
directives at configuration load time and refuse to accept invalid
ones. It was previously possible to specify invalid CIDR address
ranges (e.g. user@127.1.2.3/55) and these would always match, possibly
resulting in granting access where it was not intended.
- ssh(1): Add a proxy multiplexing mode to ssh(1) inspired by the
version in PuTTY by Simon Tatham. This allows a multiplexing client
to communicate with the master process using a subset of the SSH
packet and channels protocol over a Unix-domain socket, with the main
process acting as a proxy that translates channel IDs, etc. This
allows multiplexing mode to run on systems that lack file-descriptor
passing (used by current multiplexing code) and potentially, in
conjunction with Unix-domain socket forwarding, with the client and
multiplexing master process on different machines. Multiplexing proxy
mode may be invoked using "ssh -O proxy ...".
- sshd(8): Add a sshd_config DisableForwarding option that disables X11,
agent, TCP, tunnel and Unix domain socket forwarding, as well as
anything else we might implement in the future. Like the 'restrict'
authorized_keys flag, this is intended to be a simple and future-proof
way of restricting an account.
- sshd(8), ssh(1): Support the "curve25519-sha256" key exchange method.
This is identical to the currently-supported method named
"<email address hidden>".
- sshd(8): Improve handling of SIGHUP by checking to see if sshd is
already daemonised at startup and skipping the call to daemon(3) if it
is. This ensures that a SIGHUP restart of sshd(8) will retain the
same process-ID as the initial execution. sshd(8) will also now
unlink the PidFile prior to SIGHUP restart and re-create it after a
successful restart, rather than leaving a stale file in the case of a
configuration error.
- sshd(8): Allow ClientAliveInterval and ClientAliveCountMax directives
to appear in sshd_config Match blocks.
- sshd(8): Add %-escapes to AuthorizedPrincipalsCommand to match those
supported by AuthorizedKeysCommand (key, key type, fingerprint, etc.)
and a few more to provide access to the contents of the certificate
being offered.
- ssh(1): Allow IdentityFile to successfully load and use certificates
that have no corresponding bare public key.
- ssh(1): Fix public key authentication when multiple authentication is
in use and publickey is not just the first method attempted.
- ssh(1): Improve reporting when attempting to load keys from PKCS#11
tokens with fewer useless log messages and more detail in debug
messages.
- ssh(1): When tearing down ControlMaster connections, don't pollute
stderr when LogLevel=quiet.
- sftp(1): On ^Z wait for underlying ssh(1) to suspend before suspending
sftp(1) to ensure that ssh(1) restores the terminal mode correctly if
suspended during a password prompt.
- ssh(1): Avoid busy-wait when ssh(1) is suspended during a password
prompt (LP: #1646813).
- ssh(1), sshd(8): Correctly report errors during sending of ext-info
messages.
- sshd(8): Fix NULL-deref crash if sshd(8) received an out-of-sequence
NEWKEYS message.
- sshd(8): Correct list of supported signature algorithms sent in the
server-sig-algs extension.
- sshd(8): Fix sending ext_info message if privsep is disabled.
- sshd(8): More strictly enforce the expected ordering of privilege
separation monitor calls used for authentication and allow them only
when their respective authentication methods are enabled in the
configuration.
- sshd_config(5): Use 2001:db8::/32, the official IPv6 subnet for
configuration examples.
- On environments configured with Turkish locales, fall back to the
C/POSIX locale to avoid errors in configuration parsing caused by that
locale's unique handling of the letters 'i' and 'I' (LP: #1638338).
- contrib: Add a gnome-ssh-askpass3 with GTK+3 support.
- sshd(8): Improve PRNG reseeding across privilege separation and force
libcrypto to obtain a high-quality seed before chroot or sandboxing.
* Apply "wrap-and-sort -at -f debian/control -f debian/tests/control".
* Remove entries related to protocol 1 from the default sshd_config
generated on new installations.
* Remove some advice related to protocol 1 from README.Debian.
* Start handling /etc/ssh/sshd_config using ucf. The immediate motivation
for this is to deal with deprecations of options related to protocol 1,
but something like this has been needed for a long time (closes:
#419574, #848089):
- sshd_config is now a slightly-patched version of upstream's, and only
contains non-default settings (closes: #147201).
- I've included as many historical md5sums of default versions of
sshd_config as I could reconstruct from version control, but I'm sure
I've missed some.
- Explicitly synchronise the debconf database with the current
configuration file state in openssh-server.config, to ensure that the
PermitRootLogin setting is properly preserved.
- UsePrivilegeSeparation now defaults to the stronger "sandbox" rather
than "yes", per upstream.
* Remove redundant "GSSAPIDelegateCredentials no" from ssh_config (already
the upstream default), and document that setting ServerAliveInterval to
300 by default if BatchMode is set is Debian-specific (closes: #765630).
* Build gnome-ssh-askpass with GTK+ 3 (LP: #801187).
* When running regression tests under autopkgtest, use a non-root user
with passwordless sudo.
-- Colin Watson <email address hidden> Tue, 27 Dec 2016 18:01:46 +0000
Available diffs
- diff from 1:7.3p1-5 to 1:7.4p1-1 (582.2 KiB)
openssh (1:7.3p1-5) unstable; urgency=medium
* debian/tests/control: Add dependency on openssl, required by the PuTTY
interoperability tests.
-- Colin Watson <email address hidden> Sat, 03 Dec 2016 03:43:21 +0000
Available diffs
- diff from 1:7.3p1-4 to 1:7.3p1-5 (530 bytes)
openssh (1:7.3p1-4) unstable; urgency=medium
* Adjust Build-Depends further to avoid considering libssl-dev >= 1.1.0~
as sufficient.
* Move build directories under debian/.
* Remove the non-upstream .gitignore file and add the relevant entries to
debian/.gitignore, in order to make the source tree more
dgit-compatible.
* Build all upstream regression test binaries using the new
"regress-binaries" target.
* Fix and enable PuTTY interoperability tests under autopkgtest.
-- Colin Watson <email address hidden> Fri, 02 Dec 2016 20:49:30 +0000
Available diffs
openssh (1:7.3p1-3) unstable; urgency=medium * Avoid building with OpenSSL 1.1 for now (see #828475). * Add a missing License line to debian/copyright. * Policy version 3.9.8: no changes required. -- Colin Watson <email address hidden> Sat, 05 Nov 2016 15:37:15 +0000
Available diffs
- diff from 1:7.3p1-2 to 1:7.3p1-3 (969 bytes)
openssh (1:7.3p1-2) unstable; urgency=high
* Rewrite debian/copyright using copyright-format 1.0.
* CVE-2016-8858: Unregister the KEXINIT handler after message has been
received (closes: #841884).
-- Colin Watson <email address hidden> Mon, 24 Oct 2016 11:18:00 +0100
openssh (1:6.7p1-5+deb8u3) jessie-security; urgency=high
* Non-maintainer upload by the Security Team.
* CVE-2016-6210: User enumeration via covert timing channel
(closes: #831902).
-- Laszlo Boszormenyi (GCS) <email address hidden> Thu, 21 Jul 2016 15:51:59 +0000
openssh (1:7.3p1-1) unstable; urgency=medium
* New upstream release (http://www.openssh.com/txt/release-7.3):
- SECURITY: sshd(8): Mitigate a potential denial-of-service attack
against the system's crypt(3) function via sshd(8). An attacker could
send very long passwords that would cause excessive CPU use in
crypt(3). sshd(8) now refuses to accept password authentication
requests of length greater than 1024 characters.
- SECURITY: ssh(1), sshd(8): Fix observable timing weakness in the CBC
padding oracle countermeasures. Note that CBC ciphers are disabled by
default and only included for legacy compatibility.
- SECURITY: ssh(1), sshd(8): Improve operation ordering of MAC
verification for Encrypt-then-MAC (EtM) mode transport MAC algorithms
to verify the MAC before decrypting any ciphertext. This removes the
possibility of timing differences leaking facts about the plaintext,
though no such leakage has been observed.
- ssh(1): Add a ProxyJump option and corresponding -J command-line flag
to allow simplified indirection through a one or more SSH bastions or
"jump hosts".
- ssh(1): Add an IdentityAgent option to allow specifying specific agent
sockets instead of accepting one from the environment.
- ssh(1): Allow ExitOnForwardFailure and ClearAllForwardings to be
optionally overridden when using ssh -W.
- ssh(1), sshd(8): Implement support for the IUTF8 terminal mode as per
draft-sgtatham-secsh-iutf8-00 (closes: #337041, LP: #394570).
- ssh(1), sshd(8): Add support for additional fixed Diffie-Hellman 2K,
4K and 8K groups from draft-ietf-curdle-ssh-kex-sha2-03.
- ssh-keygen(1), ssh(1), sshd(8): Support SHA256 and SHA512 RSA
signatures in certificates.
- ssh(1): Add an Include directive for ssh_config(5) files (closes:
#536031).
- ssh(1): Permit UTF-8 characters in pre-authentication banners sent
from the server.
- ssh(1), sshd(8): Reduce the syslog level of some relatively common
protocol events from LOG_CRIT.
- sshd(8): Refuse AuthenticationMethods="" in configurations and accept
AuthenticationMethods=any for the default behaviour of not requiring
multiple authentication.
- sshd(8): Remove obsolete and misleading "POSSIBLE BREAK-IN ATTEMPT!"
message when forward and reverse DNS don't match.
- ssh(1): Deduplicate LocalForward and RemoteForward entries to fix
failures when both ExitOnForwardFailure and hostname canonicalisation
are enabled.
- sshd(8): Remove fallback from moduli to obsolete "primes" file that
was deprecated in 2001 (LP: #1528251).
- sshd_config(5): Correct description of UseDNS: it affects ssh hostname
processing for authorized_keys, not known_hosts.
- sshd(8): Send ClientAliveInterval pings when a time-based RekeyLimit
is set; previously keepalive packets were not being sent.
- sshd(8): Whitelist more architectures to enable the seccomp-bpf
sandbox.
- scp(1): Respect the local user's LC_CTYPE locale (closes: #396295).
- Take character display widths into account for the progressmeter
(closes: #407088).
-- Colin Watson <email address hidden> Sun, 07 Aug 2016 22:45:26 +0100
Available diffs
- diff from 1:7.2p2-8 to 1:7.3p1-1 (327.0 KiB)
openssh (1:7.2p2-8) unstable; urgency=medium
[ Colin Watson ]
* Stop enabling ssh-session-cleanup.service by default; instead, ship it
as an example and add a section to README.Debian. libpam-systemd >= 230
and "UsePAM yes" should take care of the original problem for most
systemd users (thanks, Michael Biebl; closes: #832155).
[ Martin Pitt ]
* Add debian/agent-launch: Helper script for conditionally starting the SSH
agent in the user session. Use it in ssh-agent.user-session.upstart.
* Add systemd user unit for graphical sessions that use systemd. Override
the corresponding upstart job in that case (closes: #832445).
* debian/openssh-server.if-up: Don't block on a finished reload of
openssh.service, to avoid deadlocking with restarting networking.
(closes: #832557, LP: #1584393)
-- Colin Watson <email address hidden> Fri, 29 Jul 2016 02:51:32 +0100
Available diffs
- diff from 1:7.2p2-7 to 1:7.2p2-8 (2.8 KiB)
openssh (1:7.2p2-7) unstable; urgency=medium
* Don't stop the ssh-session-cleanup service on upgrade (closes: #832155).
This may cause SSH sessions to be killed on upgrade to *this* version if
you had previously installed 1:7.2p2-6. Sorry! If your session is
killed, you can recover using "dpkg --unpack" on this openssh-server
.deb, followed by "dpkg --configure -a".
* Recommend libpam-systemd from openssh-server. It's a much better
solution than the above for systemd users, but I'm wary of depending on
it in case I cause an assortment of exciting dependency problems on
upgrade for non-systemd users.
-- Colin Watson <email address hidden> Sat, 23 Jul 2016 11:46:33 +0100
Available diffs
- diff from 1:7.2p2-5 to 1:7.2p2-7 (7.4 KiB)
- diff from 1:7.2p2-6 to 1:7.2p2-7 (1.0 KiB)
openssh (1:7.2p2-6) unstable; urgency=medium
* debian/watch: Switch to HTTP (thanks, Nicholas Luedtke; closes:
#822997).
* Copy summary of supported SFTP protocol versions from upstream's
PROTOCOL file into the openssh-sftp-server package description (closes:
#766887).
* Set SSH_PROGRAM=/usr/bin/ssh1 when building openssh-client-ssh1 so that
scp1 works (reported by Olivier MATZ).
* Retroactively add a NEWS.Debian entry for the UseDNS change in 6.9 (see
LP #1588457).
* CVE-2016-6210: Mitigate user enumeration via covert timing channel
(closes: #831902).
* Backport upstream patch to close ControlPersist background process
stderr when not in debug mode or when logging to a file or syslog
(closes: #714526).
* Add a session cleanup script and a systemd unit file to trigger it,
which serves to terminate SSH sessions cleanly if systemd doesn't do
that itself, often because libpam-systemd is not installed (thanks,
Vivek Das Mohapatra, Tom Hutter, and others; closes: #751636).
* Stop generating DSA host keys by default (thanks, Santiago Vila; closes:
#823827).
-- Colin Watson <email address hidden> Fri, 22 Jul 2016 17:06:19 +0100
Available diffs
- diff from 1:7.2p2-5 to 1:7.2p2-6 (6.9 KiB)
| Published in wheezy-release |
openssh (1:6.0p1-4+deb7u4) wheezy-security; urgency=high * Non-maintainer upload by the Security Team. * CVE-2015-8325: Ignore PAM environment vars when UseLogin=yes -- Salvatore Bonaccorso <email address hidden> Thu, 14 Apr 2016 09:39:14 +0200
openssh (1:6.7p1-5+deb8u2) jessie-security; urgency=high * Non-maintainer upload by the Security Team. * CVE-2015-8325: Ignore PAM environment vars when UseLogin=yes -- Salvatore Bonaccorso <email address hidden> Thu, 14 Apr 2016 09:21:40 +0200
openssh (1:7.2p2-5) unstable; urgency=medium
* Backport upstream patch to unbreak authentication using lone certificate
keys in ssh-agent: when attempting pubkey auth with a certificate, if no
separate private key is found among the keys then try with the
certificate key itself (thanks, Paul Querna; LP: #1575961).
-- Colin Watson <email address hidden> Thu, 28 Apr 2016 01:52:01 +0100
Available diffs
- diff from 1:7.2p2-4 to 1:7.2p2-5 (1.5 KiB)
openssh (1:7.2p2-4) unstable; urgency=medium * Drop dependency on libnss-files-udeb (closes: #819686). * Policy version 3.9.7: no changes required. -- Colin Watson <email address hidden> Fri, 15 Apr 2016 16:40:07 +0100
Available diffs
- diff from 1:7.2p2-3 to 1:7.2p2-4 (933 bytes)
openssh (1:7.2p2-3) unstable; urgency=high * Change all openssh.org references to openssh.com (closes: #819213). * CVE-2015-8325: Ignore PAM environment vars when UseLogin=yes. -- Colin Watson <email address hidden> Wed, 13 Apr 2016 16:42:28 +0100
Available diffs
- diff from 1:7.2p2-2 to 1:7.2p2-3 (4.5 KiB)
| Superseded in wheezy-release |
openssh (1:6.0p1-4+deb7u3) wheezy-security; urgency=high
* Non-maintainer upload by the Security Team.
* Disable roaming in openssh client: roaming code is vulnerable to an
information leak (CVE-2016-0777) and heap-based buffer overflow
(CVE-2016-0778).
-- Yves-Alexis Perez <email address hidden> Wed, 13 Jan 2016 22:35:39 +0100
openssh (1:7.2p2-2) unstable; urgency=medium
* Fix kexgss_server to cope with DH_GRP_MIN/DH_GRP_MAX being stricter on
the server end than the client (thanks, Damien Miller; closes: #817870,
LP: #1558576).
-- Colin Watson <email address hidden> Mon, 21 Mar 2016 12:08:55 +0000
Available diffs
- diff from 1:7.2p2-1 to 1:7.2p2-2 (4.7 KiB)
openssh (1:7.2p2-1) unstable; urgency=high
* New upstream release (http://www.openssh.com/txt/release-7.2p2):
- SECURITY: sshd(8): Sanitise X11 authentication credentials to avoid
xauth command injection when X11Forwarding is enabled
(http://www.openssh.com/txt/x11fwd.adv).
-- Colin Watson <email address hidden> Thu, 10 Mar 2016 13:04:29 +0000
Available diffs
- diff from 1:7.2p1-1 to 1:7.2p2-1 (6.6 KiB)
openssh (1:7.2p1-1) unstable; urgency=medium
* New upstream release (http://www.openssh.com/txt/release-7.2):
- This release disables a number of legacy cryptographic algorithms by
default in ssh:
+ Several ciphers blowfish-cbc, cast128-cbc, all arcfour variants and
the rijndael-cbc aliases for AES.
+ MD5-based and truncated HMAC algorithms.
These algorithms are already disabled by default in sshd.
- ssh(1), sshd(8): Remove unfinished and unused roaming code (was
already forcibly disabled in OpenSSH 7.1p2).
- ssh(1): Eliminate fallback from untrusted X11 forwarding to trusted
forwarding when the X server disables the SECURITY extension.
- ssh(1), sshd(8): Increase the minimum modulus size supported for
diffie-hellman-group-exchange to 2048 bits.
- sshd(8): Pre-auth sandboxing is now enabled by default (previous
releases enabled it for new installations via sshd_config).
- all: Add support for RSA signatures using SHA-256/512 hash algorithms
based on draft-rsa-dsa-sha2-256-03.txt and draft-ssh-ext-info-04.txt.
- ssh(1): Add an AddKeysToAgent client option which can be set to 'yes',
'no', 'ask', or 'confirm', and defaults to 'no'. When enabled, a
private key that is used during authentication will be added to
ssh-agent if it is running (with confirmation enabled if set to
'confirm').
- sshd(8): Add a new authorized_keys option "restrict" that includes all
current and future key restrictions (no-*-forwarding, etc.). Also add
permissive versions of the existing restrictions, e.g. "no-pty" ->
"pty". This simplifies the task of setting up restricted keys and
ensures they are maximally-restricted, regardless of any permissions
we might implement in the future.
- ssh(1): Add ssh_config CertificateFile option to explicitly list
certificates.
- ssh-keygen(1): Allow ssh-keygen to change the key comment for all
supported formats (closes: #811125).
- ssh-keygen(1): Allow fingerprinting from standard input, e.g.
"ssh-keygen -lf -" (closes: #509058).
- ssh-keygen(1): Allow fingerprinting multiple public keys in a file,
e.g. "ssh-keygen -lf ~/.ssh/authorized_keys".
- sshd(8): Support "none" as an argument for sshd_config Foreground and
ChrootDirectory. Useful inside Match blocks to override a global
default.
- ssh-keygen(1): Support multiple certificates (one per line) and
reading from standard input (using "-f -") for "ssh-keygen -L"
- ssh-keyscan(1): Add "ssh-keyscan -c ..." flag to allow fetching
certificates instead of plain keys.
- ssh(1): Better handle anchored FQDNs (e.g. 'cvs.openbsd.org.') in
hostname canonicalisation - treat them as already canonical and remove
the trailing '.' before matching ssh_config.
- sftp(1): Existing destination directories should not terminate
recursive uploads (regression in OpenSSH 6.8; LP: #1553378).
* Use HTTPS for Vcs-* URLs, and link to cgit rather than gitweb.
* Restore slogin symlinks for compatibility, although they were removed
upstream.
-- Colin Watson <email address hidden> Tue, 08 Mar 2016 11:47:20 +0000
Available diffs
- diff from 1:7.1p2-2 to 1:7.2p1-1 (301.7 KiB)
openssh (1:6.7p1-5+deb8u1) jessie-security; urgency=high
* Non-maintainer upload by the Security Team.
* Disable roaming in openssh client: roaming code is vulnerable to an
information leak (CVE-2016-0777) and heap-based buffer overflow
(CVE-2016-0778).
-- Yves-Alexis Perez <email address hidden> Wed, 13 Jan 2016 22:08:52 +0100
openssh (1:7.1p2-2) unstable; urgency=medium
* Remove protocol 1 host key generation from openssh-server.postinst
(closes: #811265).
-- Colin Watson <email address hidden> Sun, 17 Jan 2016 14:10:19 +0000
Available diffs
- diff from 1:7.1p2-1 to 1:7.1p2-2 (741 bytes)
openssh (1:7.1p2-1) unstable; urgency=high
* New upstream release (http://www.openssh.com/txt/release-7.1p2):
- CVE-2016-0777, CVE-2016-0778: Disable experimental client-side support
for roaming, which could be tricked by a malicious server into leaking
client memory to the server, including private client user keys; this
information leak is restricted to connections to malicious or
compromised servers (closes: #810984).
- SECURITY: Fix an out of-bound read access in the packet handling code.
Reported by Ben Hawkes.
- Further use of explicit_bzero has been added in various buffer
handling code paths to guard against compilers aggressively doing
dead-store removal.
-- Colin Watson <email address hidden> Thu, 14 Jan 2016 15:28:03 +0000
Available diffs
- diff from 1:7.1p1-6 to 1:7.1p2-1 (28.3 KiB)
openssh (1:7.1p1-6) unstable; urgency=medium
[ Colin Watson ]
* Remove explicit "XS-Testsuite: autopkgtest" from debian/control;
dpkg-source now figures that out automatically based on the existence of
debian/tests/control.
* Allow authenticating as root using gssapi-keyex even with
"PermitRootLogin prohibit-password" (closes: #809695).
* Shuffle PROPOSAL_KEX_ALGS mangling for GSSAPI key exchange a little
later in ssh_kex2 so that it's actually effective (closes: #809696).
[ Michael Biebl ]
* Don't call sd_notify when sshd is re-execed (closes: #809035).
-- Colin Watson <email address hidden> Mon, 04 Jan 2016 15:09:10 +0000
Available diffs
- diff from 1:7.1p1-4 to 1:7.1p1-6 (8.4 KiB)
- diff from 1:7.1p1-5 to 1:7.1p1-6 (7.6 KiB)
openssh (1:7.1p1-5) unstable; urgency=medium [ Michael Biebl ] * Add systemd readiness notification support (closes: #778913). -- Colin Watson <email address hidden> Mon, 21 Dec 2015 22:10:07 +0000
Available diffs
- diff from 1:7.1p1-4 to 1:7.1p1-5 (2.6 KiB)
openssh (1:7.1p1-4) unstable; urgency=medium
* Backport upstream patch to unbreak connections with peers that set
first_kex_follows (LP: #1526357).
-- Colin Watson <email address hidden> Tue, 15 Dec 2015 15:40:18 +0000
Available diffs
- diff from 1:7.1p1-3 to 1:7.1p1-4 (1.2 KiB)
openssh (1:7.1p1-3) unstable; urgency=medium
* Drop priority of openssh-client-ssh1 to extra (closes: #807518).
* Redirect regression test input from /dev/zero, since otherwise conch
will immediately send EOF.
-- Colin Watson <email address hidden> Thu, 10 Dec 2015 15:12:10 +0000
Available diffs
- diff from 1:7.1p1-1 to 1:7.1p1-3 (8.4 KiB)
- diff from 1:7.1p1-2 to 1:7.1p1-3 (657 bytes)
openssh (1:7.1p1-2) unstable; urgency=medium
* Really enable conch interoperability tests under autopkgtest.
* Drop SSH1 keepalive patch. Now that SSH1 is disabled at compile-time,
it's been rejected upstream and there isn't much point carrying it any
more.
* Add NEWS.Debian documenting cryptographic changes in OpenSSH 7.0
(closes: #806962).
* Add an openssh-client-ssh1 binary package for people who need to connect
to outdated SSH1-only servers (closes: #807107).
* Update "Subsystem sftp" path in example sshd_config (closes: #691004,
LP: #1437005).
-- Colin Watson <email address hidden> Tue, 08 Dec 2015 15:33:08 +0000
Available diffs
- diff from 1:7.1p1-1 to 1:7.1p1-2 (8.3 KiB)
openssh (1:7.1p1-1) unstable; urgency=medium
* New upstream release (http://www.openssh.com/txt/release-7.0, closes:
#785190):
- Support for the legacy SSH version 1 protocol is disabled by default
at compile time.
- Support for the 1024-bit diffie-hellman-group1-sha1 key exchange is
disabled by default at run-time. It may be re-enabled using the
instructions at http://www.openssh.com/legacy.html
- Support for ssh-dss, ssh-dss-cert-* host and user keys is disabled by
default at run-time. These may be re-enabled using the instructions
at http://www.openssh.com/legacy.html
- Support for the legacy v00 cert format has been removed.
- The default for the sshd_config(5) PermitRootLogin option has changed
from "yes" to "prohibit-password".
- PermitRootLogin=without-password/prohibit-password now bans all
interactive authentication methods, allowing only public-key,
hostbased and GSSAPI authentication (previously it permitted
keyboard-interactive and password-less authentication if those were
enabled).
- ssh_config(5): Add PubkeyAcceptedKeyTypes option to control which
public key types are available for user authentication.
- sshd_config(5): Add HostKeyAlgorithms option to control which public
key types are offered for host authentications.
- ssh(1), sshd(8): Extend Ciphers, MACs, KexAlgorithms,
HostKeyAlgorithms, PubkeyAcceptedKeyTypes and HostbasedKeyTypes
options to allow appending to the default set of algorithms instead of
replacing it. Options may now be prefixed with a '+' to append to the
default, e.g. "HostKeyAlgorithms=+ssh-dss".
- sshd_config(5): PermitRootLogin now accepts an argument of
'prohibit-password' as a less-ambiguous synonym of 'without-
password'.
- ssh(1), sshd(8): Add compatability workarounds for Cisco and more
PuTTY versions.
- Fix some omissions and errors in the PROTOCOL and PROTOCOL.mux
documentation relating to Unix domain socket forwarding.
- ssh(1): Improve the ssh(1) manual page to include a better description
of Unix domain socket forwarding (closes: #779068).
- ssh(1), ssh-agent(1): Skip uninitialised PKCS#11 slots, fixing
failures to load keys when they are present.
- ssh(1), ssh-agent(1): Do not ignore PKCS#11 hosted keys that wth empty
CKA_ID.
- sshd(8): Clarify documentation for UseDNS option.
- Check realpath(3) behaviour matches what sftp-server requires and use
a replacement if necessary.
* New upstream release (http://www.openssh.com/txt/release-7.1):
- sshd(8): OpenSSH 7.0 contained a logic error in PermitRootLogin=
prohibit-password/without-password that could, depending on
compile-time configuration, permit password authentication to root
while preventing other forms of authentication. This problem was
reported by Mantas Mikulenas.
- ssh(1), sshd(8): Add compatibility workarounds for FuTTY.
- ssh(1), sshd(8): Refine compatibility workarounds for WinSCP.
- Fix a number of memory faults (double-free, free of uninitialised
memory, etc) in ssh(1) and ssh-keygen(1). Reported by Mateusz
Kocielski.
* Change "PermitRootLogin without-password" to the new preferred spelling
of "PermitRootLogin prohibit-password" in sshd_config, and update
documentation to reflect the new upstream default.
* Enable conch interoperability tests under autopkgtest.
-- Colin Watson <email address hidden> Wed, 02 Dec 2015 20:18:35 +0000
Available diffs
- diff from 1:6.9p1-3 to 1:7.1p1-1 (125.2 KiB)
openssh (1:6.9p1-3) unstable; urgency=medium
* ssh_config(5): Fix markup errors in description of GSSAPITrustDns
(closes: #799271).
* Fix dh_install and dh_fixperms overrides to work properly with an
architecture-independent-only build (closes: #806090).
* Do much less work in architecture-independent-only builds.
* Drop ConsoleKit session registration patch; it was only ever enabled for
Ubuntu, which no longer needs it (LP: #1334916, #1502045).
-- Colin Watson <email address hidden> Tue, 24 Nov 2015 22:48:53 +0000
Available diffs
- diff from 1:6.9p1-2 to 1:6.9p1-3 (13.8 KiB)
openssh (1:6.9p1-2) unstable; urgency=medium
[ Colin Watson ]
* mention-ssh-keygen-on-keychange.patch: Move example ssh-keygen
invocation onto a separate line to make it easier to copy and paste
(LP: #1491532).
[ Tyler Hicks ]
* Build with audit support on Linux (closes: #797727, LP: #1478087).
-- Colin Watson <email address hidden> Thu, 10 Sep 2015 12:26:11 +0100
Available diffs
- diff from 1:6.9p1-1 to 1:6.9p1-2 (4.3 KiB)
openssh (1:6.9p1-1) unstable; urgency=medium
* New upstream release (http://www.openssh.com/txt/release-6.8):
- sshd(8): UseDNS now defaults to 'no'. Configurations that match
against the client host name (via sshd_config or authorized_keys) may
need to re-enable it or convert to matching against addresses.
- Add FingerprintHash option to ssh(1) and sshd(8), and equivalent
command-line flags to the other tools to control algorithm used for
key fingerprints. The default changes from MD5 to SHA256 and format
from hex to base64.
Fingerprints now have the hash algorithm prepended. An example of the
new format: SHA256:mVPwvezndPv/ARoIadVY98vAC0g+P/5633yTC4d/wXE
Please note that visual host keys will also be different.
- ssh(1), sshd(8): Experimental host key rotation support. Add a
protocol extension for a server to inform a client of all its
available host keys after authentication has completed. The client
may record the keys in known_hosts, allowing it to upgrade to better
host key algorithms and a server to gracefully rotate its keys.
The client side of this is controlled by a UpdateHostkeys config
option (default off).
- ssh(1): Add a ssh_config HostbasedKeyType option to control which host
public key types are tried during host-based authentication.
- ssh(1), sshd(8): Fix connection-killing host key mismatch errors when
sshd offers multiple ECDSA keys of different lengths.
- ssh(1): When host name canonicalisation is enabled, try to parse host
names as addresses before looking them up for canonicalisation. Fixes
bz#2074 and avoids needless DNS lookups in some cases.
- ssh(1), ssh-keysign(8): Make ed25519 keys work for host based
authentication.
- sshd(8): SSH protocol v.1 workaround for the Meyer, et al,
Bleichenbacher Side Channel Attack. Fake up a bignum key before RSA
decryption.
- sshd(8): Remember which public keys have been used for authentication
and refuse to accept previously-used keys. This allows
AuthenticationMethods=publickey,publickey to require that users
authenticate using two _different_ public keys.
- sshd(8): add sshd_config HostbasedAcceptedKeyTypes and
PubkeyAcceptedKeyTypes options to allow sshd to control what public
key types will be accepted (closes: #481133). Currently defaults to
all.
- sshd(8): Don't count partial authentication success as a failure
against MaxAuthTries.
- ssh(1): Add RevokedHostKeys option for the client to allow text-file
or KRL-based revocation of host keys.
- ssh-keygen(1), sshd(8): Permit KRLs that revoke certificates by serial
number or key ID without scoping to a particular CA.
- ssh(1): Add a "Match canonical" criteria that allows ssh_config Match
blocks to trigger only in the second config pass.
- ssh(1): Add a -G option to ssh that causes it to parse its
configuration and dump the result to stdout, similar to "sshd -T".
- ssh(1): Allow Match criteria to be negated. E.g. "Match !host".
- ssh-keyscan(1): ssh-keyscan has been made much more robust against
servers that hang or violate the SSH protocol (closes: #241119).
- ssh(1), ssh-keygen(1): Fix regression bz#2306: Key path names were
being lost as comment fields (closes: #787776).
- ssh(1): Allow ssh_config Port options set in the second config parse
phase to be applied (they were being ignored; closes: #774369).
- ssh(1): Tweak config re-parsing with host canonicalisation - make the
second pass through the config files always run when host name
canonicalisation is enabled (and not whenever the host name changes)
- ssh(1): Fix passing of wildcard forward bind addresses when connection
multiplexing is in use.
- ssh-keygen(1): Fix broken private key conversion from non-OpenSSH
formats.
- ssh-keygen(1): Fix KRL generation bug when multiple CAs are in use.
* New upstream release (http://www.openssh.com/txt/release-6.9):
- CVE-2015-5352: ssh(1): When forwarding X11 connections with
ForwardX11Trusted=no, connections made after ForwardX11Timeout expired
could be permitted and no longer subject to XSECURITY restrictions
because of an ineffective timeout check in ssh(1) coupled with "fail
open" behaviour in the X11 server when clients attempted connections
with expired credentials (closes: #790798). This problem was reported
by Jann Horn.
- SECURITY: ssh-agent(1): Fix weakness of agent locking (ssh-add -x) to
password guessing by implementing an increasing failure delay, storing
a salted hash of the password rather than the password itself and
using a timing-safe comparison function for verifying unlock attempts.
This problem was reported by Ryan Castellucci.
- sshd(8): Support admin-specified arguments to AuthorizedKeysCommand
(closes: #740494).
- sshd(8): Add AuthorizedPrincipalsCommand that allows retrieving
authorized principals information from a subprocess rather than a
file.
- ssh(1), ssh-add(1): Support PKCS#11 devices with external PIN entry
devices.
- ssh-keygen(1): Support "ssh-keygen -lF hostname" to search known_hosts
and print key hashes rather than full keys.
- ssh-agent(1): Add -D flag to leave ssh-agent in foreground without
enabling debug mode.
- ssh(1), sshd(8): Deprecate legacy SSH2_MSG_KEX_DH_GEX_REQUEST_OLD
message and do not try to use it against some 3rd-party SSH
implementations that use it (older PuTTY, WinSCP).
- ssh(1), sshd(8): Cap DH-GEX group size at 4Kbits for Cisco
implementations as some would fail when attempting to use group sizes
>4K (closes: #740307, LP: #1287222).
- ssh(1): Fix out-of-bound read in EscapeChar configuration option
parsing.
- sshd(8): Fix application of PermitTunnel, LoginGraceTime,
AuthenticationMethods and StreamLocalBindMask options in Match blocks.
- ssh(1), sshd(8): Improve disconnection message on TCP reset.
- ssh(1): Remove failed remote forwards established by multiplexing from
the list of active forwards.
- sshd(8): Make parsing of authorized_keys "environment=" options
independent of PermitUserEnv being enabled.
- sshd(8): Fix post-auth crash with permitopen=none (closes: #778807).
- ssh(1), ssh-add(1), ssh-keygen(1): Allow new-format private keys to be
encrypted with AEAD ciphers.
- ssh(1): Allow ListenAddress, Port and AddressFamily configuration
options to appear in any order.
- sshd(8): Check for and reject missing arguments for VersionAddendum
and ForceCommand.
- ssh(1), sshd(8): Don't treat unknown certificate extensions as fatal.
- ssh-keygen(1): Make stdout and stderr output consistent.
- ssh(1): Mention missing DISPLAY environment in debug log when X11
forwarding requested.
- sshd(8): Correctly record login when UseLogin is set.
- sshd(8): Add some missing options to sshd -T output and fix output of
VersionAddendum and HostCertificate.
- Document and improve consistency of options that accept a "none"
argument: TrustedUserCAKeys, RevokedKeys, AuthorizedPrincipalsFile.
- ssh(1): Include remote username in debug output.
- sshd(8): Avoid compatibility problem with some versions of Tera Term,
which would crash when they received the hostkeys notification message
(<email address hidden>).
- sshd(8): Mention ssh-keygen -E as useful when comparing legacy MD5
host key fingerprints.
- ssh(1): Clarify pseudo-terminal request behaviour and make manual
language consistent.
- ssh(1): Document that the TERM environment variable is not subject to
SendEnv and AcceptEnv; bz#2386
- sshd(8): Format UsePAM setting when using sshd -T (closes: #767648).
- moduli(5): Update DH-GEX moduli (closes: #787037).
* There are some things I want to fix before upgrading to 7.0p1, though I
intend to do that soon. In the meantime, backport some patches, mainly
to fix security issues:
- SECURITY: sshd(8): OpenSSH 6.8 and 6.9 incorrectly set TTYs to be
world-writable. Local attackers may be able to write arbitrary
messages to logged-in users, including terminal escape sequences.
Reported by Nikolay Edigaryev.
- SECURITY: sshd(8): Fixed a privilege separation weakness related to
PAM support. Attackers who could successfully compromise the
pre-authentication process for remote code execution and who had valid
credentials on the host could impersonate other users. Reported by
Moritz Jodeit.
- SECURITY: sshd(8): Fixed a use-after-free bug related to PAM support
that was reachable by attackers who could compromise the
pre-authentication process for remote code execution (closes:
#795711). Also reported by Moritz Jodeit.
- CVE-2015-5600: sshd(8): Fix circumvention of MaxAuthTries using
keyboard-interactive authentication (closes: #793616). By specifying
a long, repeating keyboard-interactive "devices" string, an attacker
could request the same authentication method be tried thousands of
times in a single pass. The LoginGraceTime timeout in sshd(8) and any
authentication failure delays implemented by the authentication
mechanism itself were still applied. Found by Kingcope.
- Let principals-command.sh work for noexec /var/run.
* Thanks to Jakub Jelen of Red Hat for Fedora's rebased version of the
GSSAPI key exchange patch.
* Document the Debian-specific change to the default value of
ForwardX11Trusted in ssh(1) (closes: #781469).
-- Colin Watson <email address hidden> Thu, 20 Aug 2015 10:38:58 +0100
Available diffs
openssh (1:6.7p1-6) unstable; urgency=medium
[ Martin Pitt ]
* openssh-server.postinst: Quiesce "Unable to connect to Upstart" error
message from initctl if upstart is installed, but not the current init
system. (LP: #1440070)
* openssh-server.postinst: Fix version comparisons of upgrade adjustments
to not apply to fresh installs.
-- Colin Watson <email address hidden> Sun, 19 Apr 2015 14:32:43 +0100
Available diffs
openssh (1:6.7p1-5) unstable; urgency=medium
* Revert change from previous upload, which causes far more trouble than
it is worth (closes: #780797):
- Send/accept only specific known LC_* variables, rather than using a
wildcard.
* Add a NEWS.Debian entry documenting this reversion, as it is too
difficult to undo the sshd_config change automatically without
compounding the problem of (arguably) overwriting user configuration.
-- Colin Watson <email address hidden> Sun, 22 Mar 2015 23:20:56 +0000
Available diffs
- diff from 1:6.7p1-4 to 1:6.7p1-5 (2.7 KiB)
openssh (1:6.7p1-4) unstable; urgency=medium
* Send/accept only specific known LC_* variables, rather than using a
wildcard (closes: #765633).
* Document interactions between ListenAddress/Port and ssh.socket in
README.Debian (closes: #764842).
* Debconf translations:
- Brazilian Portuguese (thanks, José de Figueiredo; closes: #771859).
-- Colin Watson <email address hidden> Wed, 18 Mar 2015 15:34:13 +0000
Available diffs
- diff from 1:6.7p1-3 to 1:6.7p1-4 (3.7 KiB)
openssh (1:6.7p1-3) unstable; urgency=medium
* Debconf translations:
- Dutch (thanks, Frans Spiesschaert; closes: #765851).
* Assume that dpkg-statoverride exists and drop the test for an obsolete
compatibility path.
-- Colin Watson <email address hidden> Mon, 03 Nov 2014 20:29:52 +0000
Available diffs
- diff from 1:6.7p1-2 to 1:6.7p1-3 (1.9 KiB)
openssh (1:6.7p1-2) unstable; urgency=medium
* debian/tests/control: Drop isolation-container, since the tests run on a
high port. They're still not guaranteed to run correctly in an schroot,
but may manage to work, so this lets the tests at least try to run on
ci.debian.net.
-- Colin Watson <email address hidden> Fri, 10 Oct 2014 10:47:19 +0100
Available diffs
- diff from 1:6.6p1-8 to 1:6.7p1-2 (270.2 KiB)
openssh (1:6.7p1-1) unstable; urgency=medium
* New upstream release (http://www.openssh.com/txt/release-6.7):
- sshd(8): The default set of ciphers and MACs has been altered to
remove unsafe algorithms. In particular, CBC ciphers and arcfour* are
disabled by default. The full set of algorithms remains available if
configured explicitly via the Ciphers and MACs sshd_config options.
- ssh(1), sshd(8): Add support for Unix domain socket forwarding. A
remote TCP port may be forwarded to a local Unix domain socket and
vice versa or both ends may be a Unix domain socket (closes: #236718).
- ssh(1), ssh-keygen(1): Add support for SSHFP DNS records for ED25519
key types.
- sftp(1): Allow resumption of interrupted uploads.
- ssh(1): When rekeying, skip file/DNS lookups of the hostkey if it is
the same as the one sent during initial key exchange.
- sshd(8): Allow explicit ::1 and 127.0.0.1 forwarding bind addresses
when GatewayPorts=no; allows client to choose address family.
- sshd(8): Add a sshd_config PermitUserRC option to control whether
~/.ssh/rc is executed, mirroring the no-user-rc authorized_keys
option.
- ssh(1): Add a %C escape sequence for LocalCommand and ControlPath that
expands to a unique identifer based on a hash of the tuple of (local
host, remote user, hostname, port). Helps avoid exceeding miserly
pathname limits for Unix domain sockets in multiplexing control paths.
- sshd(8): Make the "Too many authentication failures" message include
the user, source address, port and protocol in a format similar to the
authentication success / failure messages.
- Use CLOCK_BOOTTIME in preference to CLOCK_MONOTONIC when it is
available. It considers time spent suspended, thereby ensuring
timeouts (e.g. for expiring agent keys) fire correctly (closes:
#734553).
- Use prctl() to prevent sftp-server from accessing
/proc/self/{mem,maps}.
* Restore TCP wrappers support, removed upstream in 6.7. It is true that
dropping this reduces preauth attack surface in sshd. On the other
hand, this support seems to be quite widely used, and abruptly dropping
it (from the perspective of users who don't read openssh-unix-dev) could
easily cause more serious problems in practice. It's not entirely clear
what the right long-term answer for Debian is, but it at least probably
doesn't involve dropping this feature shortly before a freeze.
* Replace patch to disable OpenSSL version check with an updated version
of Kurt Roeckx's patch from #732940 to just avoid checking the status
field.
* Build-depend on a new enough dpkg-dev for dpkg-buildflags, rather than
simply a new enough dpkg.
* Simplify debian/rules using /usr/share/dpkg/buildflags.mk.
* Use Package-Type rather than XC-Package-Type, now that it is an official
field.
* Run a subset of the upstream regression test suite at package build
time, and the rest of it under autopkgtest.
-- Colin Watson <email address hidden> Thu, 09 Oct 2014 14:05:56 +0100
openssh (1:6.6p1-8) unstable; urgency=medium
* Make the if-up hook use "reload" rather than "restart" if the system was
booted using systemd (closes: #756547).
* Show fingerprints of new keys after creating them in the postinst
(closes: #762128).
* Policy version 3.9.6: no changes required.
* Don't link /usr/share/doc/ssh to openssh-client, as this is not safe
between Architecture: all and Architecture: any binary packages (closes:
#763375).
-- Colin Watson <email address hidden> Fri, 03 Oct 2014 12:23:57 +0100
Available diffs
- diff from 1:6.6p1-7 to 1:6.6p1-8 (1.6 KiB)
openssh (1:6.6p1-7) unstable; urgency=medium
* Make sure that DEB_HOST_ARCH is set, even when invoking debian/rules
directly.
* Use dh-exec to simplify override_dh_install target.
* Remove several unnecessary entries in debian/*.dirs.
* Pass noupdate to the second call to pam_motd, not the first (thanks, Ken
T Takusagawa; closes: #757059).
* Debconf translations:
- Turkish (thanks, Mert Dirik; closes: #756757).
-- Colin Watson <email address hidden> Tue, 05 Aug 2014 09:10:04 +0100
Available diffs
- diff from 1:6.6p1-6 to 1:6.6p1-7 (3.4 KiB)
| Published in squeeze-release |
openssh (1:5.5p1-6+squeeze5) oldstable-security; urgency=high
* CVE-2014-2532: Disallow invalid characters in environment variable names
to prevent bypassing AcceptEnv wildcard restrictions.
* CVE-2014-2653: Attempt SSHFP lookup even if server presents a
certificate (closes: #742513).
-- Colin Watson <email address hidden> Thu, 03 Apr 2014 01:05:27 +0100
openssh (1:6.0p1-4+deb7u2) stable; urgency=medium * Restore patch to disable OpenSSL version check (closes: #749472). -- Colin Watson <email address hidden> Sat, 28 Jun 2014 14:27:46 +0100
openssh (1:6.6p1-6) unstable; urgency=medium
* Upgrade to debhelper v9.
* Only use pam_keyinit on Linux architectures (closes: #747245).
* Make get_config_option more robust against trailing whitespace (thanks,
LaMont Jones).
* Debconf translations:
- Czech (thanks, Michal Šimůnek; closes: #751419).
-- Colin Watson <email address hidden> Sat, 28 Jun 2014 14:50:04 +0100
Available diffs
openssh (1:6.6p1-5) unstable; urgency=medium
* Force ssh-agent Upstart job to use sh syntax regardless of the user's
shell (thanks, Steffen Stempel; LP: #1312928).
-- Colin Watson <email address hidden> Thu, 01 May 2014 16:27:53 +0100
Available diffs
- diff from 1:6.6p1-4 to 1:6.6p1-5 (579 bytes)
openssh (1:6.0p1-4+deb7u1) stable-security; urgency=high
* CVE-2014-2532: Disallow invalid characters in environment variable names
to prevent bypassing AcceptEnv wildcard restrictions.
* CVE-2014-2653: Attempt SSHFP lookup even if server presents a
certificate (closes: #742513).
-- Colin Watson <email address hidden> Thu, 03 Apr 2014 00:05:17 +0100
openssh (1:6.6p1-4) unstable; urgency=medium
* Debconf translations:
- Spanish (thanks, Matías Bellone; closes: #744867).
* Apply upstream-recommended patch to fix bignum encoding for
<email address hidden>, fixing occasional key exchange failures.
-- Colin Watson <email address hidden> Mon, 21 Apr 2014 21:29:53 +0100
Available diffs
openssh (1:6.6p1-3) unstable; urgency=medium
* Debconf translations:
- French (thanks, Étienne Gilli; closes: #743242).
* Never signal the service supervisor with SIGSTOP more than once, to
prevent a hang on re-exec (thanks, Robie Basak; LP: #1306877).
-- Colin Watson <email address hidden> Mon, 14 Apr 2014 12:11:50 +0100
openssh (1:6.6p1-2) unstable; urgency=medium
* If no root password is set, then switch to "PermitRootLogin
without-password" without asking (LP: #1300127).
-- Colin Watson <email address hidden> Mon, 31 Mar 2014 12:20:46 +0100
Available diffs
- diff from 1:6.6p1-1 to 1:6.6p1-2 (566 bytes)
openssh (1:6.6p1-1) unstable; urgency=medium
[ Colin Watson ]
* Apply various warning-suppression and regression-test fixes to
gssapi.patch from Damien Miller.
* New upstream release (http://www.openssh.com/txt/release-6.6,
LP: #1298280):
- CVE-2014-2532: sshd(8): when using environment passing with an
sshd_config(5) AcceptEnv pattern with a wildcard, OpenSSH prior to 6.6
could be tricked into accepting any environment variable that contains
the characters before the wildcard character.
* Re-enable btmp logging, as its permissions were fixed a long time ago in
response to #370050 (closes: #341883).
* Change to "PermitRootLogin without-password" for new installations, and
ask a debconf question when upgrading systems with "PermitRootLogin yes"
from previous versions (closes: #298138).
* Debconf translations:
- Danish (thanks, Joe Hansen).
- Portuguese (thanks, Américo Monteiro).
- Russian (thanks, Yuri Kozlov; closes: #742308).
- Swedish (thanks, Andreas Rönnquist).
- Japanese (thanks, victory).
- German (thanks, Stephan Beck; closes: #742541).
- Italian (thanks, Beatrice Torracca).
* Don't start ssh-agent from the Upstart user session job if something
like Xsession has already done so (based on work by Bruno Vasselle;
LP: #1244736).
[ Matthew Vernon ]
* CVE-2014-2653: Fix failure to check SSHFP records if server presents a
certificate (bug reported by me, patch by upstream's Damien Miller;
thanks also to Mark Wooding for his help in fixing this) (Closes:
#742513)
-- Colin Watson <email address hidden> Fri, 28 Mar 2014 18:04:41 +0000
Available diffs
- diff from 1:6.5p1-6 to 1:6.6p1-1 (95.1 KiB)
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