Issued:

2012-07-18

Updated:

2012-07-18

RHSA-2012:1098 - Moderate: glibc security and bug fix update

Synopsis

Moderate: glibc security and bug fix update

Type/Severity

Security Advisory Moderate

Topic

Updated glibc packages that fix three security issues and one bug are now available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

Description

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. (BZ#837026)

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

Solution

Before applying this update, make sure all previously-released errata relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/knowledge/articles/11258

Affected Products

Updated Packages

• glibc-2.12-1.80.el6_3.3.x86_64.rpm
• nscd-2.12-1.80.el6_3.3.ppc64.rpm
• glibc-debuginfo-common-2.12-1.80.el6_3.3.x86_64.rpm
• glibc-debuginfo-common-2.12-1.80.el6_3.3.s390x.rpm
• glibc-static-2.12-1.80.el6_3.3.s390.rpm
• glibc-2.12-1.80.el6_3.3.s390.rpm
• glibc-common-2.12-1.80.el6_3.3.x86_64.rpm
• glibc-debuginfo-2.12-1.80.el6_3.3.x86_64.rpm
• glibc-headers-2.12-1.80.el6_3.3.ppc64.rpm
• glibc-devel-2.12-1.80.el6_3.3.ppc64.rpm
• glibc-debuginfo-2.12-1.80.el6_3.3.i686.rpm
• glibc-static-2.12-1.80.el6_3.3.x86_64.rpm
• glibc-2.12-1.80.el6_3.3.ppc.rpm
• glibc-utils-2.12-1.80.el6_3.3.ppc64.rpm
• glibc-common-2.12-1.80.el6_3.3.ppc64.rpm
• glibc-static-2.12-1.80.el6_3.3.ppc.rpm
• glibc-static-2.12-1.80.el6_3.3.ppc64.rpm
• glibc-common-2.12-1.80.el6_3.3.s390x.rpm
• glibc-debuginfo-common-2.12-1.80.el6_3.3.i686.rpm
• glibc-debuginfo-2.12-1.80.el6_3.3.s390.rpm
• glibc-headers-2.12-1.80.el6_3.3.i686.rpm
• glibc-2.12-1.80.el6_3.3.i686.rpm
• nscd-2.12-1.80.el6_3.3.x86_64.rpm
• glibc-static-2.12-1.80.el6_3.3.s390x.rpm
• glibc-devel-2.12-1.80.el6_3.3.s390x.rpm
• glibc-utils-2.12-1.80.el6_3.3.x86_64.rpm
• glibc-devel-2.12-1.80.el6_3.3.ppc.rpm
• nscd-2.12-1.80.el6_3.3.i686.rpm
• glibc-common-2.12-1.80.el6_3.3.i686.rpm
• glibc-headers-2.12-1.80.el6_3.3.s390x.rpm
• glibc-debuginfo-2.12-1.80.el6_3.3.ppc.rpm
• glibc-devel-2.12-1.80.el6_3.3.x86_64.rpm
• glibc-devel-2.12-1.80.el6_3.3.s390.rpm
• glibc-2.12-1.80.el6_3.3.s390x.rpm
• glibc-2.12-1.80.el6_3.3.src.rpm
• glibc-debuginfo-common-2.12-1.80.el6_3.3.s390.rpm
• glibc-utils-2.12-1.80.el6_3.3.s390x.rpm
• glibc-debuginfo-2.12-1.80.el6_3.3.s390x.rpm
• glibc-utils-2.12-1.80.el6_3.3.i686.rpm
• glibc-static-2.12-1.80.el6_3.3.i686.rpm
• glibc-debuginfo-common-2.12-1.80.el6_3.3.ppc64.rpm
• glibc-debuginfo-common-2.12-1.80.el6_3.3.ppc.rpm
• glibc-devel-2.12-1.80.el6_3.3.i686.rpm
• glibc-headers-2.12-1.80.el6_3.3.x86_64.rpm
• glibc-debuginfo-2.12-1.80.el6_3.3.ppc64.rpm
• glibc-2.12-1.80.el6_3.3.ppc64.rpm
• nscd-2.12-1.80.el6_3.3.s390x.rpm

Fixes

• This content is not included.BZ - 826943
• This content is not included.BZ - 833703
• This content is not included.BZ - 833704
• This content is not included.BZ - 837026

CVEs

• CVE-2012-3406
• CVE-2012-3405
• CVE-2012-3404

References

• https://access.redhat.com/security/updates/classification/#moderate

Additional information

• The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
• Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.