USN-3608-1: Zsh vulnerabilities

27 March 2018

zsh vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 17.10
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS

Summary

Several security issues were fixed in Zsh.

Software Description

  • zsh - shell with lots of features

Details

Richard Maciel Costa discovered that Zsh incorrectly handled certain inputs. An attacker could possibly use this to cause a denial of service. (CVE-2018-1071)

It was discovered that Zsh incorrectly handled certain files. An attacker could possibly use this to execute arbitrary code. (CVE-2018-1083)

Update instructions

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

Ubuntu 17.10
zsh - 5.2-5ubuntu1.2
Ubuntu 16.04 LTS
zsh - 5.1.1-1ubuntu2.2
Ubuntu 14.04 LTS
zsh - 5.0.2-3ubuntu6.2

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

After a standard system update you need to restart Zsh to make all the necessary changes

References