Issued:
2011-08-18
Updated:
2011-08-18

RHBA-2011:1179 - glibc bug fix update

Synopsis

glibc bug fix update

Type/Severity

Bug Fix Advisory

Topic

Updated glibc packages that resolve several issues are now available for Red Hat Enterprise Linux 6.

Description

The glibc packages contain the standard C and the standard math libraries. These libraries are used by multiple programs on the system, and without these libraries, the Linux system cannot function properly.

These updated glibc packages provide fixes for the following bugs:

  • Under certain circumstances, a threaded process could have been granted incomplete group membership of the user which was running the process. This was caused by glibc using its default method for group membership determination, which led to a situation in which multiple threads interfered with each other while attempting to retrieve information simultaneously. Due to the nature of the group membership determination method used, each thread ended up with a different subset of the entire result set. With this update, the group membership determination method has been modified to precede this interference. (BZ#712125)

  • When a process corrupted its heap, the malloc() function could have entered a deadlock situation while building up an error message string. This caused the process unresponsive. With this update, the code has been modified to use the mmap() function to allocate memory for the error message. This workaround ensures that the malloc() deadlock no longer occurs when allocating memory for an error message when the corrupted process heap is detected, and such a process is now normally aborted. (BZ#712407)

  • Prior to this update, the Name Service Caching Daemon (nscd) did not clear the host cache effectively when repopulating its values. The code has been modified to schedule nscd cache pruning more accurately. (BZ#712411)

  • Previously, nscd did not take into consideration time-to-live (TTL) parameters for the DNS records it was caching. With this update, the code has been modified so that nscd now respects TTL parameters when it answers requests for DNS records. (BZ#715387)

All users of glibc are advised to upgrade to these updated packages, which resolve these issues.

Solution

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

This update is available via 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 Virtual Storage Appliance (from RHUI)6.1x86_64
Red Hat Enterprise Linux for x86_64 - Extended Update Support6.1x86_64
Red Hat Enterprise Linux for x86_64 - Extended Update Support6.1i386
Red Hat Enterprise Linux for Scientific Computing6x86_64
Red Hat Enterprise Linux for Power, big endian6ppc64
Red Hat Enterprise Linux for Power, big endian - Extended Update Support6.1ppc64
Red Hat Enterprise Linux for IBM z Systems6s390x
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support6.1s390x
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 Update Support from RHUI6.1x86_64
Red Hat Enterprise Linux Server - Extended Update Support from RHUI6.1i386
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-utils-2.12-1.25.el6_1.3.x86_64.rpm
  • glibc-2.12-1.25.el6_1.3.i686.rpm
  • glibc-2.12-1.25.el6_1.3.src.rpm
  • glibc-static-2.12-1.25.el6_1.3.x86_64.rpm
  • glibc-debuginfo-2.12-1.25.el6_1.3.i686.rpm
  • nscd-2.12-1.25.el6_1.3.ppc64.rpm
  • glibc-common-2.12-1.25.el6_1.3.s390x.rpm
  • glibc-common-2.12-1.25.el6_1.3.x86_64.rpm
  • glibc-devel-2.12-1.25.el6_1.3.ppc.rpm
  • glibc-2.12-1.25.el6_1.3.x86_64.rpm
  • nscd-2.12-1.25.el6_1.3.i686.rpm
  • glibc-debuginfo-2.12-1.25.el6_1.3.s390.rpm
  • glibc-2.12-1.25.el6_1.3.ppc64.rpm
  • glibc-devel-2.12-1.25.el6_1.3.s390.rpm
  • glibc-debuginfo-2.12-1.25.el6_1.3.ppc64.rpm
  • glibc-devel-2.12-1.25.el6_1.3.x86_64.rpm
  • glibc-debuginfo-2.12-1.25.el6_1.3.x86_64.rpm
  • nscd-2.12-1.25.el6_1.3.x86_64.rpm
  • glibc-headers-2.12-1.25.el6_1.3.i686.rpm
  • glibc-devel-2.12-1.25.el6_1.3.s390x.rpm
  • glibc-debuginfo-2.12-1.25.el6_1.3.ppc.rpm
  • glibc-static-2.12-1.25.el6_1.3.s390x.rpm
  • glibc-2.12-1.25.el6_1.3.ppc.rpm
  • glibc-debuginfo-2.12-1.25.el6_1.3.s390x.rpm
  • glibc-common-2.12-1.25.el6_1.3.i686.rpm
  • glibc-2.12-1.25.el6_1.3.s390.rpm
  • glibc-2.12-1.25.el6_1.3.s390x.rpm
  • glibc-headers-2.12-1.25.el6_1.3.s390x.rpm
  • glibc-utils-2.12-1.25.el6_1.3.ppc64.rpm
  • glibc-static-2.12-1.25.el6_1.3.i686.rpm
  • glibc-devel-2.12-1.25.el6_1.3.ppc64.rpm
  • glibc-headers-2.12-1.25.el6_1.3.ppc64.rpm
  • glibc-utils-2.12-1.25.el6_1.3.i686.rpm
  • glibc-static-2.12-1.25.el6_1.3.ppc64.rpm
  • glibc-headers-2.12-1.25.el6_1.3.x86_64.rpm
  • glibc-common-2.12-1.25.el6_1.3.ppc64.rpm
  • glibc-devel-2.12-1.25.el6_1.3.i686.rpm
  • glibc-utils-2.12-1.25.el6_1.3.s390x.rpm
  • nscd-2.12-1.25.el6_1.3.s390x.rpm

Fixes

CVEs

(none)

References

(none)

Additional information