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Ubuntu 18.04 LTS USN-3764-1 Critical Zsh Code Execution Risk

ubuntu
Calendar Grey September 11, 2018
Dist Ubuntu Esm H88
Exploits in Zsh may lead to unauthorized code execution. Ensure your Ubuntu installations are updated immediately to safeguard against these threats.
Zsh could be made to execute arbitrary code if it received a specially crafted script.

Summary

Zsh could be made to execute arbitrary code if it received

a specially crafted script.

Software Description:

- zsh: shell with lots of features

Details:

It was discovered that Zsh incorrectly handled certain scripts.

An attacker could possibly use this issue to execute arbitrary code.

(CVE-2018-0502, CVE-2018-13259)

Richard Maciel Costa discovered that Zsh incorrectly handled certain

scripts. An attacker could possibly use this issue to execute arbitrary

code. (CVE-2018-1100)

Topics%20covered

Topics Covered

security advisory critical code execution Ubuntu arbitrary code script issue Zsh

Update Instructions

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

Ubuntu 18.04 LTS:
  zsh                             5.4.2-3ubuntu3.1

Ubuntu 16.04 LTS:
  zsh                             5.1.1-1ubuntu2.3

Ubuntu 14.04 LTS:
  zsh                             5.0.2-3ubuntu6.3

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

References

  https://ubuntu.com/security/notices/USN-3764-1

  CVE-2018-0502, CVE-2018-1100, CVE-2018-13259

Severity
critical
Lowest
Low
Medium
High
Critical

September 11, 2018

Topics%20covered

Topics Covered

security advisory critical code execution Ubuntu arbitrary code script issue Zsh

Package Information

  https://launchpad.net/ubuntu/+source/zsh/5.4.2-3ubuntu3.1
  https://launchpad.net/ubuntu/+source/zsh/5.1.1-1ubuntu2.3
  https://launchpad.net/ubuntu/+source/zsh/5.0.2-3ubuntu6.3

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