[slackware-security] zsh

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://vulners.com/cve/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:
ftp://ftp.slackware.com/pub/slackware/slackware-15.0/patches/packages/zsh-5.9-i586-1_slack15.0.txz

Updated package for Slackware x86_64 15.0:
ftp://ftp.slackware.com/pub/slackware/slackware64-15.0/patches/packages/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