Issued:
2011-12-06
Updated:
2011-12-06

RHSA-2011:1526 - Low: glibc security, bug fix, and enhancement update

Synopsis

Low: glibc security, bug fix, and enhancement update

Type/Severity

Security Advisory Low

Topic

Updated glibc packages that fix two security issues, several bugs, and add various enhancements are now available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having low 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 contain the standard C libraries used by multiple programs on the system. These packages contain the standard C and the standard math libraries. Without these two libraries, a Linux system cannot function properly.

A flaw was found in the way the ldd utility identified dynamically linked libraries. If an attacker could trick a user into running ldd on a malicious binary, it could result in arbitrary code execution with the privileges of the user running ldd. (CVE-2009-5064)

It was found that the glibc addmntent() function, used by various mount helper utilities, did not handle certain errors correctly when updating the mtab (mounted file systems table) file. If such utilities had the setuid bit set, a local attacker could use this flaw to corrupt the mtab file. (CVE-2011-1089)

Red Hat would like to thank Dan Rosenberg for reporting the CVE-2011-1089 issue.

This update also fixes several bugs and adds various enhancements. Documentation for these bug fixes and enhancements will be available shortly from the Technical Notes document, linked to in the References section.

Users are advised to upgrade to these updated glibc packages, which contain backported patches to resolve these issues and add these enhancements.

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 This content is not included.https://access.redhat.com/kb/docs/DOC-11259

Affected Products

ProductVersionArch
Red Hat Enterprise Linux for Scientific Computing6x86_64
Red Hat Enterprise Linux for Power, big endian6ppc64
Red Hat Enterprise Linux for IBM z Systems6s390x
Red Hat Enterprise Linux Workstation6x86_64
Red Hat Enterprise Linux Workstation6i386
Red Hat Enterprise Linux Server6x86_64
Red Hat Enterprise Linux Server6i386
Red Hat Enterprise Linux Server from RHUI6x86_64
Red Hat Enterprise Linux Server from RHUI6i386
Red Hat Enterprise Linux Server - Retired Extended Life Cycle Support6x86_64
Red Hat Enterprise Linux Server - Extended Life Cycle Support6x86_64
Red Hat Enterprise Linux Server - Extended Life Cycle Support6i386
Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension6x86_64
Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension6i386
Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension (for IBM z Systems)6s390x
Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems)6s390x
Red Hat Enterprise Linux Desktop6x86_64
Red Hat Enterprise Linux Desktop6i386

Updated Packages

  • glibc-debuginfo-2.12-1.47.el6.x86_64.rpm
  • glibc-common-2.12-1.47.el6.ppc64.rpm
  • glibc-2.12-1.47.el6.x86_64.rpm
  • glibc-headers-2.12-1.47.el6.i686.rpm
  • glibc-2.12-1.47.el6.src.rpm
  • glibc-devel-2.12-1.47.el6.ppc.rpm
  • glibc-devel-2.12-1.47.el6.ppc64.rpm
  • glibc-debuginfo-2.12-1.47.el6.s390.rpm
  • glibc-2.12-1.47.el6.s390x.rpm
  • glibc-debuginfo-2.12-1.47.el6.s390x.rpm
  • glibc-headers-2.12-1.47.el6.s390x.rpm
  • nscd-2.12-1.47.el6.x86_64.rpm
  • glibc-static-2.12-1.47.el6.s390.rpm
  • glibc-2.12-1.47.el6.s390.rpm
  • glibc-devel-2.12-1.47.el6.s390.rpm
  • glibc-static-2.12-1.47.el6.ppc64.rpm
  • glibc-static-2.12-1.47.el6.x86_64.rpm
  • glibc-debuginfo-common-2.12-1.47.el6.x86_64.rpm
  • glibc-static-2.12-1.47.el6.ppc.rpm
  • glibc-debuginfo-common-2.12-1.47.el6.s390.rpm
  • glibc-headers-2.12-1.47.el6.ppc64.rpm
  • glibc-devel-2.12-1.47.el6.i686.rpm
  • glibc-utils-2.12-1.47.el6.i686.rpm
  • nscd-2.12-1.47.el6.ppc64.rpm
  • glibc-debuginfo-common-2.12-1.47.el6.s390x.rpm
  • glibc-debuginfo-2.12-1.47.el6.i686.rpm
  • glibc-common-2.12-1.47.el6.i686.rpm
  • glibc-2.12-1.47.el6.ppc64.rpm
  • glibc-devel-2.12-1.47.el6.s390x.rpm
  • glibc-debuginfo-common-2.12-1.47.el6.i686.rpm
  • glibc-utils-2.12-1.47.el6.s390x.rpm
  • glibc-common-2.12-1.47.el6.x86_64.rpm
  • nscd-2.12-1.47.el6.i686.rpm
  • glibc-debuginfo-common-2.12-1.47.el6.ppc.rpm
  • glibc-debuginfo-2.12-1.47.el6.ppc64.rpm
  • glibc-static-2.12-1.47.el6.i686.rpm
  • glibc-2.12-1.47.el6.ppc.rpm
  • glibc-common-2.12-1.47.el6.s390x.rpm
  • glibc-static-2.12-1.47.el6.s390x.rpm
  • glibc-utils-2.12-1.47.el6.ppc64.rpm
  • glibc-2.12-1.47.el6.i686.rpm
  • glibc-debuginfo-2.12-1.47.el6.ppc.rpm
  • nscd-2.12-1.47.el6.s390x.rpm
  • glibc-debuginfo-common-2.12-1.47.el6.ppc64.rpm
  • glibc-devel-2.12-1.47.el6.x86_64.rpm
  • glibc-utils-2.12-1.47.el6.x86_64.rpm
  • glibc-headers-2.12-1.47.el6.x86_64.rpm

Fixes

CVEs

References

Additional information