Issued:
2013-04-24
Updated:
2013-04-24

RHSA-2013:0769 - Low: glibc security and bug fix update

Synopsis

Low: glibc security and bug fix update

Type/Severity

Security Advisory Low

Topic

Updated glibc packages that fix two security issues and two bugs are now available for Red Hat Enterprise Linux 5.

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 provide the standard C libraries (libc), POSIX thread libraries (libpthread), standard math libraries (libm), and the Name Server Caching Daemon (nscd) used by multiple programs on the system. Without these libraries, the Linux system cannot function correctly.

It was found that getaddrinfo() did not limit the amount of stack memory used during name resolution. An attacker able to make an application resolve an attacker-controlled hostname or IP address could possibly cause the application to exhaust all stack memory and crash. (CVE-2013-1914)

A flaw was found in the regular expression matching routines that process multibyte character input. If an application utilized the glibc regular expression matching mechanism, an attacker could provide specially-crafted input that, when processed, would cause the application to crash. (CVE-2013-0242)

This update also fixes the following bugs:

  • The improvements RHSA-2012:1207 made to the accuracy of floating point functions in the math library caused performance regressions for those functions. The performance regressions were analyzed and a fix was applied that retains the current accuracy but reduces the performance penalty to acceptable levels. Refer to Red Hat Knowledge solution 229993, linked to in the References, for further information. (BZ#950535)

  • It was possible that a memory location freed by the localization code could be accessed immediately after, resulting in a crash. The fix ensures that the application does not crash by avoiding the invalid memory access. (BZ#951493)

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

ProductVersionArch
Red Hat Enterprise Linux for x86_64 - Extended Update Support5.9x86_64
Red Hat Enterprise Linux for x86_64 - Extended Update Support5.9ia64
Red Hat Enterprise Linux for x86_64 - Extended Update Support5.9i386
Red Hat Enterprise Linux for Power, big endian5ppc
Red Hat Enterprise Linux for Power, big endian - Extended Update Support5.9ppc
Red Hat Enterprise Linux for IBM z Systems5s390x
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support5.9s390x
Red Hat Enterprise Linux Workstation5x86_64
Red Hat Enterprise Linux Workstation5i386
Red Hat Enterprise Linux Server5x86_64
Red Hat Enterprise Linux Server5ia64
Red Hat Enterprise Linux Server5i386
Red Hat Enterprise Linux Server from RHUI5x86_64
Red Hat Enterprise Linux Server from RHUI5i386
Red Hat Enterprise Linux Server - Extended Update Support from RHUI5.9x86_64
Red Hat Enterprise Linux Server - Extended Update Support from RHUI5.9i386
Red Hat Enterprise Linux Server - AUS5.9x86_64
Red Hat Enterprise Linux Server - AUS5.9ia64
Red Hat Enterprise Linux Server - AUS5.9i386
Red Hat Enterprise Linux Desktop5x86_64
Red Hat Enterprise Linux Desktop5i386

Updated Packages

  • glibc-devel-2.5-107.el5_9.4.s390x.rpm
  • nscd-2.5-107.el5_9.4.s390x.rpm
  • glibc-utils-2.5-107.el5_9.4.ppc.rpm
  • glibc-debuginfo-2.5-107.el5_9.4.s390x.rpm
  • glibc-headers-2.5-107.el5_9.4.s390x.rpm
  • glibc-debuginfo-2.5-107.el5_9.4.x86_64.rpm
  • glibc-2.5-107.el5_9.4.ia64.rpm
  • glibc-common-2.5-107.el5_9.4.ia64.rpm
  • glibc-2.5-107.el5_9.4.s390.rpm
  • glibc-utils-2.5-107.el5_9.4.i386.rpm
  • glibc-headers-2.5-107.el5_9.4.ia64.rpm
  • glibc-devel-2.5-107.el5_9.4.ia64.rpm
  • glibc-debuginfo-common-2.5-107.el5_9.4.i386.rpm
  • glibc-common-2.5-107.el5_9.4.ppc.rpm
  • glibc-2.5-107.el5_9.4.s390x.rpm
  • glibc-debuginfo-2.5-107.el5_9.4.i386.rpm
  • glibc-headers-2.5-107.el5_9.4.x86_64.rpm
  • glibc-common-2.5-107.el5_9.4.i386.rpm
  • glibc-common-2.5-107.el5_9.4.s390x.rpm
  • glibc-utils-2.5-107.el5_9.4.s390x.rpm
  • glibc-common-2.5-107.el5_9.4.x86_64.rpm
  • glibc-debuginfo-2.5-107.el5_9.4.i686.rpm
  • glibc-debuginfo-2.5-107.el5_9.4.ppc.rpm
  • glibc-devel-2.5-107.el5_9.4.ppc.rpm
  • glibc-2.5-107.el5_9.4.ppc64.rpm
  • nscd-2.5-107.el5_9.4.ia64.rpm
  • glibc-utils-2.5-107.el5_9.4.x86_64.rpm
  • glibc-devel-2.5-107.el5_9.4.i386.rpm
  • glibc-utils-2.5-107.el5_9.4.ia64.rpm
  • glibc-debuginfo-2.5-107.el5_9.4.ia64.rpm
  • glibc-devel-2.5-107.el5_9.4.s390.rpm
  • glibc-devel-2.5-107.el5_9.4.ppc64.rpm
  • glibc-2.5-107.el5_9.4.src.rpm
  • glibc-2.5-107.el5_9.4.i386.rpm
  • nscd-2.5-107.el5_9.4.x86_64.rpm
  • nscd-2.5-107.el5_9.4.ppc.rpm
  • nscd-2.5-107.el5_9.4.i386.rpm
  • glibc-2.5-107.el5_9.4.i686.rpm
  • glibc-debuginfo-2.5-107.el5_9.4.s390.rpm
  • glibc-debuginfo-2.5-107.el5_9.4.ppc64.rpm
  • glibc-2.5-107.el5_9.4.x86_64.rpm
  • glibc-headers-2.5-107.el5_9.4.i386.rpm
  • glibc-2.5-107.el5_9.4.ppc.rpm
  • glibc-headers-2.5-107.el5_9.4.ppc.rpm
  • glibc-devel-2.5-107.el5_9.4.x86_64.rpm

Fixes

CVEs

References

Additional information