http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-6329
CONFIRM:http://perl5.git.perl.org/perl.git/commit/1735f6f53ca19f99c6e9e39496c486af323ba6a8
From 1735f6f53ca19f99c6e9e39496c486af323ba6a8 Mon Sep 17 00:00:00 2001
From: Brian Carlson <[email protected]>
Date: Wed, 28 Nov 2012 08:54:33 -0500
Subject: [PATCH] Fix misparsing of maketext strings.
Case 61251: This commit fixes a misparse of maketext strings that could
lead to arbitrary code execution. Basically, maketext was compiling
bracket notation into functions, but neglected to escape backslashes
inside the content or die on fully-qualified method names when
generating the code. This change escapes all such backslashes and dies
when a method name with a colon or apostrophe is specified.
--- perl-5.12.5/AUTHORS-orig 2013-03-05 22:57:22.320359148 -0600
+++ perl-5.12.5/AUTHORS 2013-03-05 22:58:13.374206098 -0600
@@ -139,6 +139,7 @@ Brent B. Powers <[email protected]>
Brent Dax <[email protected]>
Brooks D Boyd
Brian Callaghan <[email protected]>
+Brian Carlson <[email protected]>
Brian Clarke <[email protected]>
brian d foy <[email protected]>
Brian Grossman
--- perl-5.12.5/dist/Locale-Maketext/lib/Locale/Maketext/Guts.pm-orig 2013-03-05 23:00:24.953530801 -0600
+++ perl-5.12.5/dist/Locale-Maketext/lib/Locale/Maketext/Guts.pm 2013-03-05 23:01:05.801008668 -0600
@@ -140,21 +140,9 @@ sub _compile {
# 0-length method name means to just interpolate:
push @code, ' (';
}
- elsif($m =~ /^\w+(?:\:\:\w+)*$/s
- and $m !~ m/(?:^|\:)\d/s
- # exclude starting a (sub)package or symbol with a digit
+ elsif($m =~ /^\w+$/s
+ # exclude anything fancy, especially fully-qualified module names
) {
- # Yes, it even supports the demented (and undocumented?)
- # $obj->Foo::bar(...) syntax.
- $target->_die_pointing(
- $_[1], q{Can't use "SUPER::" in a bracket-group method},
- 2 + length($c[-1])
- )
- if $m =~ m/^SUPER::/s;
- # Because for SUPER:: to work, we'd have to compile this into
- # the right package, and that seems just not worth the bother,
- # unless someone convinces me otherwise.
-
push @code, ' $_[0]->' . $m . '(';
}
else {
@@ -208,7 +196,9 @@ sub _compile {
elsif(substr($1,0,1) ne '~') {
# it's stuff not containing "~" or "[" or "]"
# i.e., a literal blob
- $c[-1] .= $1;
+ my $text = $1;
+ $text =~ s/\\/\\\\/g;
+ $c[-1] .= $text;
}
elsif($1 eq '~~') { # "~~"
@@ -246,7 +236,9 @@ sub _compile {
else {
# It's a "~X" where X is not a special character.
# Consider it a literal ~ and X.
- $c[-1] .= $1;
+ my $text = $1;
+ $text =~ s/\\/\\\\/g;
+ $c[-1] .= $text;
}
}
}