Ubuntu
isc-dhcp package

Regression in test logic for MTU 576 in /sbin/dhclient-script

Bug #881558 reported by Stolen
10
This bug affects 2 people
Affects Status Importance Assigned to Milestone
isc-dhcp (Ubuntu)
Fix Released
Undecided
Unassigned

Bug Description

the following lines of /sbin/dhclient-script fails to detect MTU of 576:
~$ grep -A1 -n 'lt 576' /sbin/dhclient-script
177:if [ -z "$new_interface_mtu" ] || [ "$new_interface_mtu" -lt 576 ]; then
178- new_interface_mtu=''

The correct syntax is -le not -lt.
This has also been reported in debian:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=638267
But should be a simple fix and not require a new package.

The result of this error is that the MTU of an interface configured by DHCP is dropped down to 576.

$ lsb_release -rd
Description: Ubuntu 11.10
Release: 11.10

$ apt-cache policy isc-dhcp-client
isc-dhcp-client:
  Installed: 4.1.1-P1-17ubuntu10
  Candidate: 4.1.1-P1-17ubuntu10
  Version table:
 *** 4.1.1-P1-17ubuntu10 0
        500 http://ubuntu.arcticnetwork.ca/ oneiric/main amd64 Packages
        100 /var/lib/dpkg/status

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: isc-dhcp-client 4.1.1-P1-17ubuntu10
ProcVersionSignature: Ubuntu 3.0.0-12.20-server 3.0.4
Uname: Linux 3.0.0-12-server x86_64
ApportVersion: 1.23-0ubuntu3
Architecture: amd64
Date: Tue Oct 25 11:27:50 2011
ExecutablePath: /sbin/dhclient
InstallationMedia: Ubuntu-Server 11.10 "Oneiric Ocelot" - Release amd64 (20111011)
ProcAttrCurrent: /sbin/dhclient (enforce)
ProcEnviron: PATH=(custom, no user)
SourcePackage: isc-dhcp
UpgradeStatus: No upgrade log present (probably fresh install)
modified.conffile..etc.dhcp.dhclient.conf: [modified]
mtime.conffile..etc.dhcp.dhclient.conf: 2011-10-22T23:01:24.846117

Related branches

lp:ubuntu/quantal/isc-dhcp

CVE References

Revision history for this message
Stolen (colin-shaw) wrote :
Revision history for this message
Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in isc-dhcp (Ubuntu):
status: New → Confirmed
Stéphane Graber (stgraber)
Changed in isc-dhcp (Ubuntu):
status: Confirmed → Fix Committed
Revision history for this message
Launchpad Janitor (janitor) wrote :
Download full text (7.6 KiB)

This bug was fixed in the package isc-dhcp - 4.2.4-1ubuntu1

---------------
isc-dhcp (4.2.4-1ubuntu1) quantal; urgency=low

  * Merge from Debian. Remaining changes:
    (LP: #768171, LP: #841182, LP: #881558, LP: #872929, LP: #616809)
    - Use upstart jobs for isc-dhcp-server and isc-dhcp-relay.
    - Add IPv6 support to udeb dhclient-script (forwarded as Debian #635897).
    - Add an apport hook to isc-dhcp-client and isc-dhcp-server.
    - Add an apparmor profile to isc-dhcp-client and isc-dhcp-server.
    - Update default dhclient.conf to ask for IPv6 configuration.
    - Patches:
      + dhclient-fix-backoff
      + dhclient-more-debug
      + dhclient-onetry-call-clientscript
      + dhclient-safer-timeout
      + dhcpd.conf-subnet-examples
      + multi-ip-addr-per-if
      + onetry_retry_after_initial_success
      + revert-next-server
  * Set fqdn.fqdn to the result of gethostname(); (LP: #991360)
  * Replace old droppriv and deroot patches by use of --enable-paranoia
    and matching -user and -group parameters to dhcpd. (LP: #727837)
  * Allow read access to /etc/dhcp/ddns-keys/* for ddns. (LP: #341817)
    It's expected that people generate one key per zone and have it stored
    in both /etc/bind9 and /etc/dhcp/ddns-keys/ for security reason.
  * Fix apport hook to work with python3.

isc-dhcp (4.2.4-1) unstable; urgency=low

  * New upstream release
  * debian/control: reformatted Uploaders so that dch doesn't think I'm making
    NMUs
  * debian/rules: do a clean between the LDAP-enabled build and the
    non-LDAP-enabled one, so that no LDAP-related artefacts are accidently
    incorporated into the non-LDAP build
  * debian/dhclient-script.*: conditionalise the chown/chmod of the new
    resolv.conf on the existence of the old one (closes: #595400)
  * debian/dhclient-script.linux: comply with RFC 3442 and ignore
    the routers option if the rfc3442-classless-static-routes option is present
    (closes: #592735)
  * debian/dhclient-script.kfreebsd: fix subnet mask handling (closes: #677985)

isc-dhcp (4.2.2.dfsg.1-5) unstable; urgency=medium

  [ Andrew Pollock ]
  * debian/dhclient.conf: send the hostname (closes: #151820)

  [ Michael Gilbert ]
  * Fix cve-2011-4868: error in DDNS handling with IPv6 (closes: #655746)
  * Fix cve-2011-4539: error in regular expression handling
    (closes: #652259)
  * Make dependencies diff-able
  * Add myself to uploaders
  * Remove all automatically generated files in clean rule
  * Medium urgency for security updates

isc-dhcp (4.2.2.dfsg.1-4) unstable; urgency=low

  * The "Zoe woke up at 4am and I couldn't get back to sleep so I had some
    extra time to work on this" release
  * patch the Makefile for the embedded BIND libraries so that autoconf is run
    so that the modification to configure.in to fix the FTBFS on kFreeBSD
    actually does something useful (closes: #643569)

isc-dhcp (4.2.2.dfsg.1-3) unstable; urgency=low

  * debian/control: remove transitional packages
  * debian/rules: apply the intent of Pierre Chifflier's patch to enable
    hardening options (closes: #644413)
  * debian/control: also add inetutils-ping to the dependencies for
    isc-dhcp-client on hurd (...

Read more...

Changed in isc-dhcp (Ubuntu):
status: Fix Committed → Fix Released
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