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Amazon Linux AMI 2: CVE-2021-45444: Security patch for zsh (ALAS-2022-1757)

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Amazon Linux AMI 2: CVE-2021-45444: Security patch for zsh (ALAS-2022-1757)

Severity
5
CVSS
(AV:N/AC:H/Au:N/C:P/I:P/A:P)
Published
02/14/2022
Created
07/16/2022
Added
07/04/2022
Modified
07/14/2022

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.

Solution(s)

  • amazon-linux-ami-2-upgrade-zsh
  • amazon-linux-ami-2-upgrade-zsh-debuginfo
  • amazon-linux-ami-2-upgrade-zsh-html

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