CVE-2021-45444 Information

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

Reference

https://zsh.sourceforge.io/releases.html https://vuln.ryotak.me/advisories/63 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2P3LPMGENEHKDWFO4MWMZSZL6G7Y4CV7/ https://www.debian.org/security/2022/dsa-5078 https://lists.debian.org/debian-lts-announce/2022/02/msg00020.html https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BWF3EXNBX5SVFDBL4ZFOD4GJBWFUKWN4/ https://support.apple.com/kb/HT213255 https://support.apple.com/kb/HT213256 https://support.apple.com/kb/HT213257 http://seclists.org/fulldisclosure/2022/May/33 http://seclists.org/fulldisclosure/2022/May/35 http://seclists.org/fulldisclosure/2022/May/38

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8