1. Ubuntu Security Notices
  2. USN-5325-1

USN-5325-1: Zsh vulnerabilities

Publication date

14 March 2022

Overview

Several security issues were fixed in Zsh.

Releases

Packages

  • zsh - shell with lots of features

Details

Sam Foxman discovered that Zsh incorrectly handled certain inputs.
An attacker could possibly use this issue to regain dropped privileges.
(CVE-2019-20044)

It was discovered that Zsh incorrectly handled certain inputs.
An attacker could possibly use this issue to execute arbitrary code.
(CVE-2021-45444)

Sam Foxman discovered that Zsh incorrectly handled certain inputs.
An attacker could possibly use this issue to regain dropped privileges.
(CVE-2019-20044)

It was discovered that Zsh incorrectly handled certain inputs.
An attacker could possibly use this issue to execute arbitrary code.
(CVE-2021-45444)

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
21.10 impish zsh-static –  5.8-6ubuntu0.1
zsh –  5.8-6ubuntu0.1
20.04 focal zsh-static –  5.8-3ubuntu1.1
zsh –  5.8-3ubuntu1.1
18.04 bionic zsh-static –  5.4.2-3ubuntu3.2
zsh –  5.4.2-3ubuntu3.2
16.04 xenial zsh-static –  5.1.1-1ubuntu2.3+esm1  
zsh –  5.1.1-1ubuntu2.3+esm1  

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References

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