Debian Security Advisory
DLA-2926-1 zsh -- LTS security update
- Date Reported:
- 18 Feb 2022
- Affected Packages:
- Security database references:
- In Mitre's CVE dictionary: CVE-2021-45444.
- More information:
It was discovered that zsh, a powerful shell and scripting language, did not prevent recursive prompt expansion. This would allow an attacker to execute arbitrary commands into a user's shell, for instance by tricking a vcs_info user into checking out a git branch with a specially crafted name.
For Debian 9 stretch, this problem has been fixed in version 5.3.1-4+deb9u5.
We recommend that you upgrade your zsh packages.
For the detailed security status of zsh please refer to its security tracker page at: https://security-tracker.debian.org/tracker/zsh
Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS