diff -Nru perl-5.36.0/debian/changelog perl-5.36.0/debian/changelog --- perl-5.36.0/debian/changelog 2023-05-23 17:19:09.000000000 +0000 +++ perl-5.36.0/debian/changelog 2023-11-23 14:55:20.000000000 +0000 @@ -1,3 +1,12 @@ +perl (5.36.0-7ubuntu0.23.04.2) lunar-security; urgency=medium + + * SECURITY UPDATE: heap overflow via regular expression + - debian/patches/CVE-2023-47038.patch: fix read/write past buffer end + in regcomp.c, t/re/pat_advanced.t. + - CVE-2023-47038 + + -- Marc Deslauriers Thu, 23 Nov 2023 09:55:20 -0500 + perl (5.36.0-7ubuntu0.23.04.1) lunar-security; urgency=medium * SECURITY UPDATE: insecure default TLS configuration in HTTP::Tiny module diff -Nru perl-5.36.0/debian/patches/CVE-2023-47038.patch perl-5.36.0/debian/patches/CVE-2023-47038.patch --- perl-5.36.0/debian/patches/CVE-2023-47038.patch 1970-01-01 00:00:00.000000000 +0000 +++ perl-5.36.0/debian/patches/CVE-2023-47038.patch 2023-11-23 14:55:05.000000000 +0000 @@ -0,0 +1,120 @@ +From 7047915eef37fccd93e7cd985c29fe6be54650b6 Mon Sep 17 00:00:00 2001 +From: Karl Williamson +Date: Sat, 9 Sep 2023 11:59:09 -0600 +Subject: [PATCH 1/2] Fix read/write past buffer end: perl-security#140 + +A package name may be specified in a \p{...} regular expression +construct. If unspecified, "utf8::" is assumed, which is the package +all official Unicode properties are in. By specifying a different +package, one can create a user-defined property with the same +unqualified name as a Unicode one. Such a property is defined by a sub +whose name begins with "Is" or "In", and if the sub wishes to refer to +an official Unicode property, it must explicitly specify the "utf8::". +S_parse_uniprop_string() is used to parse the interior of both \p{} and +the user-defined sub lines. + +In S_parse_uniprop_string(), it parses the input "name" parameter, +creating a modified copy, "lookup_name", malloc'ed with the same size as +"name". The modifications are essentially to create a canonicalized +version of the input, with such things as extraneous white-space +stripped off. I found it convenient to strip off the package specifier +"utf8::". To to so, the code simply pretends "lookup_name" begins just +after the "utf8::", and adjusts various other values to compensate. +However, it missed the adjustment of one required one. + +This is only a problem when the property name begins with "perl" and +isn't "perlspace" nor "perlword". All such ones are undocumented +internal properties. + +What happens in this case is that the input is reparsed with slightly +different rules in effect as to what is legal versus illegal. The +problem is that "lookup_name" no longer is pointing to its initial +value, but "name" is. Thus the space allocated for filling "lookup_name" +is now shorter than "name", and as this shortened "lookup_name" is +filled by copying suitable portions of "name", the write can be to +unallocated space. + +The solution is to skip the "utf8::" when reparsing "name". Then both +"lookup_name" and "name" are effectively shortened by the same amount, +and there is no going off the end. + +This commit also does white-space adjustment so that things align +vertically for readability. + +This can be easily backported to earlier Perl releases. +--- + regcomp.c | 17 +++++++++++------ + t/re/pat_advanced.t | 8 ++++++++ + 2 files changed, 19 insertions(+), 6 deletions(-) + +diff --git a/regcomp.c b/regcomp.c +index 4051333c9d..9c0338cec3 100644 +--- a/regcomp.c ++++ b/regcomp.c +@@ -24178,7 +24178,7 @@ S_parse_uniprop_string(pTHX_ + * compile perl to know about them) */ + bool is_nv_type = FALSE; + +- unsigned int i, j = 0; ++ unsigned int i = 0, i_zero = 0, j = 0; + int equals_pos = -1; /* Where the '=' is found, or negative if none */ + int slash_pos = -1; /* Where the '/' is found, or negative if none */ + int table_index = 0; /* The entry number for this property in the table +@@ -24312,9 +24312,13 @@ S_parse_uniprop_string(pTHX_ + * all of them are considered to be for that package. For the purposes of + * parsing the rest of the property, strip it off */ + if (non_pkg_begin == STRLENs("utf8::") && memBEGINPs(name, name_len, "utf8::")) { +- lookup_name += STRLENs("utf8::"); +- j -= STRLENs("utf8::"); +- equals_pos -= STRLENs("utf8::"); ++ lookup_name += STRLENs("utf8::"); ++ j -= STRLENs("utf8::"); ++ equals_pos -= STRLENs("utf8::"); ++ i_zero = STRLENs("utf8::"); /* When resetting 'i' to reparse ++ from the beginning, it has to be ++ set past what we're stripping ++ off */ + stripped_utf8_pkg = TRUE; + } + +@@ -24728,7 +24732,8 @@ S_parse_uniprop_string(pTHX_ + + /* We set the inputs back to 0 and the code below will reparse, + * using strict */ +- i = j = 0; ++ i = i_zero; ++ j = 0; + } + } + +@@ -24749,7 +24754,7 @@ S_parse_uniprop_string(pTHX_ + * separates two digits */ + if (cur == '_') { + if ( stricter +- && ( i == 0 || (int) i == equals_pos || i == name_len- 1 ++ && ( i == i_zero || (int) i == equals_pos || i == name_len- 1 + || ! isDIGIT_A(name[i-1]) || ! isDIGIT_A(name[i+1]))) + { + lookup_name[j++] = '_'; +diff --git a/t/re/pat_advanced.t b/t/re/pat_advanced.t +index 2a2541142e..088efedb38 100644 +--- a/t/re/pat_advanced.t ++++ b/t/re/pat_advanced.t +@@ -2688,6 +2688,14 @@ EOF_DEBUG_OUT + {}, "Related to Github Issue #19350, forward \\g{x} pattern segv under use re Debug => 'PARSE'"); + } + ++ { # perl-security#140, read/write past buffer end ++ fresh_perl_like('qr/\p{utf8::perl x}/', ++ qr/Illegal user-defined property name "utf8::perl x" in regex/, ++ {}, "perl-security#140"); ++ fresh_perl_is('qr/\p{utf8::_perl_surrogate}/', "", ++ {}, "perl-security#140"); ++ } ++ + + # !!! NOTE that tests that aren't at all likely to crash perl should go + # a ways above, above these last ones. There's a comment there that, like +-- +2.34.1 + diff -Nru perl-5.36.0/debian/patches/series perl-5.36.0/debian/patches/series --- perl-5.36.0/debian/patches/series 2023-05-23 17:05:49.000000000 +0000 +++ perl-5.36.0/debian/patches/series 2023-11-23 14:55:05.000000000 +0000 @@ -51,3 +51,4 @@ fixes/readline-stream-errors-test.diff fixes/lto-test-fix.diff CVE-2023-31484.patch +CVE-2023-47038.patch