Issued:

2012-08-27

Updated:

2012-08-27

RHSA-2012:1207 - 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 multiple security issues and one bug are now available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link 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 integer overflow flaws, leading to stack-based buffer overflows, were found in glibc's functions for converting a string to a numeric representation (strtod(), strtof(), and strtold()). If an application used such a function on attacker controlled input, it could cause the application to crash or, potentially, execute arbitrary code. (CVE-2012-3480)

This update also fixes the following bug:

• Previously, logic errors in various mathematical functions, including exp, exp2, expf, exp2f, pow, sin, tan, and rint, caused inconsistent results when the functions were used with the non-default rounding mode. This could also cause applications to crash in some cases. With this update, the functions now give correct results across the four different rounding modes. (BZ#839411)

All users of glibc are advised to upgrade to these updated packages, which contain backported patches to correct 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-2.5-81.el5_8.7.s390x.rpm
• nscd-2.5-81.el5_8.7.s390x.rpm
• glibc-common-2.5-81.el5_8.7.ia64.rpm
• glibc-devel-2.5-81.el5_8.7.ia64.rpm
• glibc-common-2.5-81.el5_8.7.s390x.rpm
• glibc-headers-2.5-81.el5_8.7.ia64.rpm
• glibc-utils-2.5-81.el5_8.7.ia64.rpm
• glibc-debuginfo-2.5-81.el5_8.7.s390x.rpm
• glibc-devel-2.5-81.el5_8.7.s390x.rpm
• glibc-debuginfo-2.5-81.el5_8.7.ia64.rpm
• glibc-2.5-81.el5_8.7.i386.rpm
• glibc-headers-2.5-81.el5_8.7.i386.rpm
• glibc-debuginfo-2.5-81.el5_8.7.i386.rpm
• glibc-common-2.5-81.el5_8.7.i386.rpm
• nscd-2.5-81.el5_8.7.x86_64.rpm
• glibc-headers-2.5-81.el5_8.7.s390x.rpm
• glibc-2.5-81.el5_8.7.src.rpm
• glibc-2.5-81.el5_8.7.ppc64.rpm
• glibc-2.5-81.el5_8.7.ia64.rpm
• glibc-headers-2.5-81.el5_8.7.x86_64.rpm
• glibc-headers-2.5-81.el5_8.7.ppc.rpm
• glibc-utils-2.5-81.el5_8.7.x86_64.rpm
• glibc-devel-2.5-81.el5_8.7.s390.rpm
• glibc-2.5-81.el5_8.7.x86_64.rpm
• glibc-devel-2.5-81.el5_8.7.ppc.rpm
• glibc-debuginfo-2.5-81.el5_8.7.s390.rpm
• glibc-2.5-81.el5_8.7.s390.rpm
• glibc-2.5-81.el5_8.7.i686.rpm
• nscd-2.5-81.el5_8.7.ia64.rpm
• glibc-devel-2.5-81.el5_8.7.ppc64.rpm
• glibc-utils-2.5-81.el5_8.7.s390x.rpm
• glibc-common-2.5-81.el5_8.7.x86_64.rpm
• glibc-debuginfo-2.5-81.el5_8.7.i686.rpm
• glibc-devel-2.5-81.el5_8.7.i386.rpm
• nscd-2.5-81.el5_8.7.i386.rpm
• glibc-devel-2.5-81.el5_8.7.x86_64.rpm
• glibc-debuginfo-common-2.5-81.el5_8.7.i386.rpm
• glibc-debuginfo-2.5-81.el5_8.7.ppc.rpm
• glibc-2.5-81.el5_8.7.ppc.rpm
• glibc-utils-2.5-81.el5_8.7.i386.rpm
• glibc-debuginfo-2.5-81.el5_8.7.ppc64.rpm
• glibc-debuginfo-2.5-81.el5_8.7.x86_64.rpm
• glibc-common-2.5-81.el5_8.7.ppc.rpm
• glibc-utils-2.5-81.el5_8.7.ppc.rpm
• nscd-2.5-81.el5_8.7.ppc.rpm

Fixes

• This content is not included.BZ - 847715

CVEs

• CVE-2012-3480

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.