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CVE-2021-45444

Public on 2022-02-14
Modified on 2022-10-25
Description

A vulnerability was found in zsh in the parsecolorchar() function of prompt.c file. This flaw allows an attacker to perform code execution if they control a command output inside the prompt, as stated by a %F%K argument. This occurs because of recursive PROMPT_SUBST expansion.

Severity
Medium
See what this means
CVSS v3 Base Score
7.8
See breakdown

Affected Packages

Platform Package Release Date Advisory
Amazon Linux 2 - Core zsh 2022-03-01 17:43 ALAS2-2022-1757
Amazon Linux 2023 zsh 2023-02-17 20:44 ALAS2023-2023-035

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD CVSSv2 5.1 AV:N/AC:H/Au:N/C:P/I:P/A:P
NVD CVSSv3 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

Red Hat: CVE-2021-45444 Mitre: CVE-2021-45444 FAQs regarding Amazon Linux ALAS/CVE Severity