RHBA-2013:0885 - Bug Fix Advisory

Topic

Updated glibc packages that fix three bugs are now available for Red Hat
Enterprise Linux 5.

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, a Linux system cannot function correctly.

This update fixes the following bugs:

• A bug in the nscd daemon caused it to cache results for DNS entries with a TTL

value of zero. Consequently, DNS lookups returned stale results. The nscd daemon
has been fixed to correctly respect DNS TTL entries of zero. Now, nscd no longer
caches DNS entries with a TTL of zero and lookups for those entries return
correct and current results. (BZ#962903)

• Previously, a library-security mechanism failed to correctly run the

initialization functions of dynamically loaded character-conversion routines.
This could lead to an unexpected termination with a segmentation fault when
trying to use such a routine. With this update, the library-security mechanism
has been fixed to correctly run the initialization functions and the
character-conversion routines no longer cause crashes. (BZ#963812)

• Due to a bug in the library-localization routines, applications could

terminate unexpectedly in low-memory conditions. The affected routines have been
fixed to correctly detect and report errors in the event of a low-memory
condition preventing their correct operation. As a result, applications running
under low-memory conditions no longer crash while calling localization routines.
(BZ#963813)

Users of glibc are advised to upgrade to these updated packages, which fix these
bugs.

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

• Red Hat Enterprise Linux Server 5 x86_64
• Red Hat Enterprise Linux Server 5 ia64
• Red Hat Enterprise Linux Server 5 i386
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 5.9 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 5.9 ia64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 5.9 i386
• Red Hat Enterprise Linux Server - AUS 5.9 ia64
• Red Hat Enterprise Linux Workstation 5 x86_64
• Red Hat Enterprise Linux Workstation 5 i386
• Red Hat Enterprise Linux Desktop 5 x86_64
• Red Hat Enterprise Linux Desktop 5 i386
• Red Hat Enterprise Linux for IBM z Systems 5 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 5.9 s390x
• Red Hat Enterprise Linux for Power, big endian 5 ppc
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 5.9 ppc
• Red Hat Enterprise Linux Server from RHUI 5 x86_64
• Red Hat Enterprise Linux Server from RHUI 5 i386
• Red Hat Enterprise Linux Server - AUS 5.9 x86_64
• Red Hat Enterprise Linux Server - AUS 5.9 i386
• Red Hat Enterprise Linux Server - Extended Update Support from RHUI 5.9 x86_64
• Red Hat Enterprise Linux Server - Extended Update Support from RHUI 5.9 i386

Fixes

• BZ - 963813 - glibc: a bug in the patch for RHBZ#951493

CVEs

(none)

References

(none)