GLSA 202407-01: Zsh: Prompt Expansion Vulnerability

http://security.gentoo.org/

Severity:	normal
Title:	Zsh: Prompt Expansion Vulnerability
Date:	07/01/2024
Bugs:	#833252
ID:	202407-01

Synopsis

A vulnerability has been discovered in Zsh, which can lead to execution of arbitrary code.

Background

A shell designed for interactive use, although it is also a powerful scripting language.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
app-shells/zsh	< 5.8.1	>= 5.8.1	All supported architectures

Description

Multiple vulnerabilities have been discovered in Zsh. Please review the CVE identifiers referenced below for details.

Impact

A vulnerability in prompt expansion could be exploited through e.g. VCS_Info to execute arbitrary shell commands without a user's knowledge.

Workaround

There is no known workaround at this time.

Resolution

All Zsh users should upgrade to the latest version:

          # emerge --sync
          # emerge --ask --oneshot --verbose ">=app-shells/zsh-5.8.1"

References

CVE-2021-45444

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-202407-01.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.