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Gentoo: GLSA-202407-01 Normal Severity: Zsh Prompt Expansion Risk

gentoo
Calendar Grey July 1, 2024
Dist Gentoo Esm H88
Gentoo Linux Security Advisory GLSA 202407-02 highlights a vulnerability in OpenSSH that could allow an unauthorized access breach.
A vulnerability has been discovered in Zsh, which can lead to execution of arbitrary code.

Summary

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

Topics%20covered

Topics Covered

security advisory Gentoo code execution vulnerability normal severity Zsh promptexpansion

Resolution

All Zsh users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=app-shells/zsh-5.8.1"

References

[ 1 ] CVE-2021-45444 https://nvd.nist.gov/vuln/detail/CVE-2021-45444

Availability

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

Severity: Normal
Title: Zsh: Prompt Expansion Vulnerability
Date: July 01, 2024
Bugs: #833252
ID: 202407-01

Topics%20covered

Topics Covered

security advisory Gentoo code execution vulnerability normal severity Zsh promptexpansion

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.

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Affected Packages

Package Vulnerable Unaffected -------------- ------------ ------------ app-shells/zsh < 5.8.1 >= 5.8.1

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.

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