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[slackware-security]  zsh (SSA:2025-109-01)

New zsh packages are available for Slackware 15.0 to fix a security issue.


Here are the details from the Slackware 15.0 ChangeLog:
+--------------------------+
patches/packages/zsh-5.9-i586-1_slack15.0.txz:  Upgraded.
  This release fixes a security issue in zsh-5.8:
  Some prompt expansion sequences, such as %F, support 'arguments'
 which are
  themselves expanded in case they contain colour values, etc. This additional
  expansion would trigger PROMPT_SUBST evaluation, if enabled. This could be
  abused to execute code the user didn't expect. e.g., given a certain
 prompt
  configuration, an attacker could trick a user into executing arbitrary code
  by having them check out a Git branch with a specially crafted name.
  This is fixed in the shell itself by no longer performing PROMPT_SUBST
  evaluation on these prompt-expansion arguments.
  Note that this is a potential incompatibilty if you are relying
  on the previous behavior of PROMPT_SUBST.
  Thanks to pblsxw for the heads-up on this.
  For more information, see:
    https://www.cve.org/CVERecord?id=CVE-2021-45444
  (* Security fix *)
+--------------------------+


Where to find the new packages:
+-----------------------------+

Thanks to the friendly folks at the OSU Open Source Lab
(http://osuosl.org) for donating FTP and rsync hosting
to the Slackware project!  :-)

Also see the "Get Slack" section on http://slackware.com for
additional mirror sites near you.

Updated package for Slackware 15.0:
zsh-5.9-i586-1_slack15.0.txz

Updated package for Slackware x86_64 15.0:
zsh-5.9-x86_64-1_slack15.0.txz


MD5 signatures:
+-------------+

Slackware 15.0 package:
061804a8d52ec3c1492bda4f05748fea  zsh-5.9-i586-1_slack15.0.txz

Slackware x86_64 15.0 package:
3d0b84ddbbeedf0d346ef1819bb29e32  zsh-5.9-x86_64-1_slack15.0.txz


Installation instructions:
+------------------------+

Upgrade the package as root:
# upgradepkg zsh-5.9-i586-1_slack15.0.txz


+-----+

Slackware Linux Security Team
http://slackware.com/gpg-key
security@slackware.com

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