High severity · published Feb 14, 2022
CVE-2021-45444
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
7.8
CVSS
2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.0% · higher than 80% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MA
macOS · Apple
11.0 before 11.6.6; 12.0.0 before 12.4 · source: NVD
DL
Debian Linux · Debian
9.0; 10.0; 11.0 · source: NVD
FE
Fedora · Fedoraproject
34; 35 · source: NVD
MO
Mac OS X · Apple
10.15 before 10.15.7; 10.15.7; 10.15.7; 10.15.7; 10.15.7; 10.15.7; +8 more · source: NVD
ZS
Zsh · Zsh
before 5.8.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-45444
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-45444
Mailing List
http://seclists.org/fulldisclosure/2022/May/33
Mailing List
http://seclists.org/fulldisclosure/2022/May/35
Mailing List
http://seclists.org/fulldisclosure/2022/May/38
Mailing List
https://lists.debian.org/debian-lts-announce/2022/02/msg00020.html
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2P3LPMGENEHKDWFO4MWMZSZL6G7Y4CV7/
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BWF3EXNBX5SVFDBL4ZFOD4GJBWFUKWN4/
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