Bug 434408 (CVE-2012-4412) – <sys-libs/glibc-2.19-r1: strcoll() integer overflow leading to buffer overflow (CVE-2012-{4412,4424})

• Product: Gentoo Security
• Status: RESOLVED FIXED

[Description Agostino Sarubbo 2012-09-09 09:06:33 UTC]

An integer overflow, leading to buffer overflow flaw was found in the way the implementation of strcoll() routine, used to compare two strings based on the current locale, of glibc, the GNU libc libraries, performed calculation of memory requirements / allocation, needed for storage of the strings. If an application linked against glibc was missing an application-level sanity checks for validity of strcoll() arguments and accepted untrusted input, an attacker could use this flaw to cause the particular application to crash or, potentially, execute arbitrary code with the privileges of the user running the application.

Upstream bug report (including reproducer):
[1] http://sourceware.org/bugzilla/show_bug.cgi?id=14547

[Comment 1 GLSAMaker/CVETool Bot 2013-10-15 03:15:26 UTC]

CVE-2012-4412 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-4412):
  Integer overflow in string/strcoll_l.c in the GNU C Library (aka glibc or
  libc6) 2.17 and earlier allows context-dependent attackers to cause a denial
  of service (crash) or possibly execute arbitrary code via a long string,
  which triggers a heap-based buffer overflow.

[Comment 2 Chris Reffett (RETIRED) 2013-10-15 03:21:06 UTC]

Fixed in master, see [1]. Any chance on getting a backport of the fixes?

[1] http://sourceware.org/bugzilla/show_bug.cgi?id=14547#c7

[Comment 3 GLSAMaker/CVETool Bot 2013-10-15 03:22:09 UTC]

CVE-2012-4424 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-4424):
  Stack-based buffer overflow in string/strcoll_l.c in the GNU C Library (aka
  glibc or libc6) 2.17 and earlier allows context-dependent attackers to cause
  a denial of service (crash) or possibly execute arbitrary code via a long
  string that triggers a malloc failure and use of the alloca function.

[Comment 4 Yury German 2015-03-03 03:19:08 UTC]

Maintainer(s), please drop the vulnerable version(s).

Added to an existing GLSA Request.

[Comment 5 GLSAMaker/CVETool Bot 2015-03-08 14:53:33 UTC]

This issue was resolved and addressed in
 GLSA 201503-04 at http://security.gentoo.org/glsa/glsa-201503-04.xml
by GLSA coordinator Kristian Fiskerstrand (K_F).