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.
Notes
| Author | Note |
|---|---|
| rodrigo-zaiden | 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. |
Priority
Low
CVSS 3 base score: 7.8
Status
| Package | Release | Status |
|---|---|---|
|
zsh Launchpad, Ubuntu, Debian |
bionic |
Released
(5.4.2-3ubuntu3.2)
|
| focal |
Released
(5.8-3ubuntu1.1)
|
|
| impish |
Released
(5.8-6ubuntu0.1)
|
|
| jammy |
Needs triage
|
|
| kinetic |
Not vulnerable
(5.8.1-1)
|
|
| trusty |
Ignored
(out of standard support)
|
|
| upstream |
Released
(5.8.1-1)
|
|
| xenial |
Released
(5.1.1-1ubuntu2.3+esm1)
|
|
|
Patches: upstream: https://sourceforge.net/p/zsh/code/ci/c187154f47697cdbf822c2f9d714d570ed4a0fd1/ |
||
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