RHBA-2012:0159 - Bug Fix Advisory

Topic

An updated ksh package that fixes multiple bugs and adds one enhancement is now
available for Red Hat Enterprise Linux 5.

Description

KSH-93 is the most recent version of the KornShell by David Korn of AT&T Bell
Laboratories. KornShell is a shell programming language which is also compatible
with sh, the original Bourne Shell.

This updated ksh package includes numerous bug fixes and one enhancement. Space
precludes documenting all of these changes in this advisory. Users are directed
to the Red Hat Enterprise Linux 5.8 Technical Notes for information on the most
significant of these changes:

https://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5/html/5.8_Technical_Notes/ksh.html#RHBA-2012-0159

All users of ksh are advised to upgrade to this updated package, which fixes
these bugs and adds this enhancement.

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 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 - 573936 - [PATCH] read in a ksh script in utf-8 locale does not restore tty settings
• BZ - 584704 - Return of a command substitution from within another command substitution causes stdin of coprocess to be closed in a ksh script
• BZ - 586923 - ksh memory leak significantly slows the execution of shell scripts
• BZ - 587127 - whence -q broken
• BZ - 615284 - wrong redirections with SIGPIPE traps
• BZ - 616853 - ksh crashes
• BZ - 640379 - pipefail option causes intermittent failure of 'ls|! grep'
• BZ - 642508 - ksh doesn't close the file including the function definition
• BZ - 644128 - problem with here-doc in function called from here-doc
• BZ - 647524 - completion after an environment variable results in a "bad substitution" error
• BZ - 650998 - The dot command may misdirect output
• BZ - 659459 - In ksh scripts, files may be created but then fail to be immediately opened.
• BZ - 683722 - ksh crashes when IFS is unset inside a function
• BZ - 691850 - misprocessing of invalid PID argument for ksh built-in kill
• BZ - 699641 - KSH default path missing 'cwd' /bin:/usr/bin missing colon at the end
• BZ - 709774 - ksh handling variable assignment with the use of multiple pipes and different variable assignment mechanisms
• BZ - 726199 - wait fails on pid of co-process
• BZ - 727891 - ksh crashes when IFS is unset inside a function - PART 2
• BZ - 743302 - ksh script never comes back
• BZ - 747249 - Dereference of uninitialized value (ksh)

CVEs

(none)

References

• https://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5/html/5.8_Technical_Notes/ksh.html#RHBA-2012-0159