CVE-2021-45444

Published: 14 February 2022

In zsh before 5.8.1, an attacker can achieve code execution if they control a command output inside the prompt, as demonstrated by a %F argument. This occurs because of recursive PROMPT_SUBST expansion.

Priority

Low

CVSS 3 base score: 7.8

Status

Notes

The commits fdb8b0ce and bdc4d70a are related to a partial
commit that can be used in case an user can't update to a
patched version that contains c187154f commit.

References

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-45444
• https://sourceforge.net/p/zsh/code/ci/c187154f47697cdbf822c2f9d714d570ed4a0fd1/
• https://sourceforge.net/p/zsh/code/ci/fdb8b0ce6244ff26bf55e0fd825310a58d0d3156/
• https://sourceforge.net/p/zsh/code/ci/bdc4d70a7e033b754e68a8659a037ea0fc5f38de/
• https://ubuntu.com/security/notices/USN-5325-1
• NVD
• Launchpad
• Debian

Bugs