Synopsis:    Moderate: glibc security and bug fix update
Issue Date:  2012-07-18
CVE Numbers: CVE-2012-3406
             CVE-2012-3404
             CVE-2012-3405


The glibc packages provide the standard C and standard math libraries used
by multiple programs on the system. Without these libraries, the Linux
system cannot function properly.

Multiple errors in glibc's formatted printing functionality could allow an
attacker to bypass FORTIFY_SOURCE protections and execute arbitrary code
using a format string flaw in an application, even though these protections
are expected to limit the impact of such flaws to an application abort.
(CVE-2012-3404, CVE-2012-3405, CVE-2012-3406)

This update also fixes the following bug:

* A programming error caused an internal array of nameservers to be only
partially initialized when the /etc/resolv.conf file contained IPv6
nameservers. Depending on the contents of a nearby structure, this could
cause certain applications to terminate unexpectedly with a segmentation
fault. The programming error has been fixed, which restores proper behavior
with IPv6 nameservers listed in the /etc/resolv.conf file.

All users of glibc are advised to upgrade to these updated packages, which
contain backported patches to fix these issues.

SL6:
  i386
     glibc-2.12-1.80.el6_3.3.i686.rpm
     glibc-common-2.12-1.80.el6_3.3.i686.rpm
     glibc-debuginfo-2.12-1.80.el6_3.3.i686.rpm
     glibc-debuginfo-common-2.12-1.80.el6_3.3.i686.rpm
     glibc-devel-2.12-1.80.el6_3.3.i686.rpm
     glibc-headers-2.12-1.80.el6_3.3.i686.rpm
     glibc-static-2.12-1.80.el6_3.3.i686.rpm
     glibc-utils-2.12-1.80.el6_3.3.i686.rpm
     nscd-2.12-1.80.el6_3.3.i686.rpm
  x86_64
     glibc-2.12-1.80.el6_3.3.i686.rpm
     glibc-2.12-1.80.el6_3.3.x86_64.rpm
     glibc-common-2.12-1.80.el6_3.3.x86_64.rpm
     glibc-debuginfo-2.12-1.80.el6_3.3.i686.rpm
     glibc-debuginfo-2.12-1.80.el6_3.3.x86_64.rpm
     glibc-debuginfo-common-2.12-1.80.el6_3.3.i686.rpm
     glibc-debuginfo-common-2.12-1.80.el6_3.3.x86_64.rpm
     glibc-devel-2.12-1.80.el6_3.3.i686.rpm
     glibc-devel-2.12-1.80.el6_3.3.x86_64.rpm
     glibc-headers-2.12-1.80.el6_3.3.x86_64.rpm
     glibc-static-2.12-1.80.el6_3.3.i686.rpm
     glibc-static-2.12-1.80.el6_3.3.x86_64.rpm
     glibc-utils-2.12-1.80.el6_3.3.x86_64.rpm
     nscd-2.12-1.80.el6_3.3.x86_64.rpm

- Scientific Linux Development Team