RHBA-2011:1394 - Bug Fix Advisory

Topic

An updated pdksh package that fixes a bug is now available for Red Hat
Enterprise Linux 5.

Description

The pdksh package contains a public domain implementation the Korn shell
(ksh-88). The ksh shell is a command interpreter intended for both interactive
and shell script use.

This updated pdksh package fixes the following bug:

• Prior to this update, when a SIGINT or SIGTERM was sent to a pdksh process,

the signal was propagated to the entire process group. As a consequence sending
SIGTERM to a process killed other processes even if the first process was not
the parent. With this update the SIGINT and SIGTERM signals are correctly
propagated and unexpected termination of processes no longer occurs. (BZ634666#)

All users of pdksh are advised to upgrade to this updated package, which fixes
this bug.

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/kb/docs/DOC-11259

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 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 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

• BZ - 634666 - sending SIGTERM to a process kills unrelated process

CVEs

(none)

References

(none)