RHBA-2014:1874 - Bug Fix Advisory

Topic

Updated ksh packages that fix two bugs are now available for Red Hat Enterprise
Linux 5.

Description

KornShell (KSH) is a Unix shell developed by AT&T Bell Laboratories, which is
backward-compatible with the Bourne shell (Bash) and includes many features of
the C shell. The most recent version is KSH-93. KornShell complies with the
POSIX.2 standard (IEEE Std 1003.2-1992).

This update fixes the following bugs:

• Due to a race condition in the job list code, the ksh shell could terminate

unexpectedly with a segmentation fault when the user had run custom scripts on
their system. The race condition has been fixed, and ksh now works as intended
when the user runs custom scripts. (BZ#1132741)

• Prior to this update, the compiler optimization dropped parts of the ksh job

locking mechanism from the binary code. As a consequence, ksh could terminate
unexpectedly with a segmentation fault after receiving the SIGCHLD signal.
This update ensures that the compiler does not drop parts of the ksh job locking
mechanism, and ksh thus works as expected. (BZ#1160749)

Users of ksh 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/site/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 Workstation 5 x86_64
• Red Hat Enterprise Linux Workstation 5 i386
• Red Hat Enterprise Linux for IBM z Systems 5 s390x
• Red Hat Enterprise Linux for Power, big endian 5 ppc
• Red Hat Enterprise Linux Server from RHUI 5 x86_64
• Red Hat Enterprise Linux Server from RHUI 5 i386

Fixes

CVEs

(none)

References

(none)