1. Ubuntu Security Notices
  2. USN-5849-1

USN-5849-1: Heimdal vulnerabilities

Publication date

8 February 2023

Overview

Heimdal could be made to crash if it received specially crafted input.

Releases

Packages

  • heimdal - Heimdal Kerberos Network Authentication Protocol

Details

Helmut Grohne discovered that Heimdal GSSAPI incorrectly handled logical
conditions that are related to memory management operations.
An attacker could possibly use this issue to cause a denial of service.

Helmut Grohne discovered that Heimdal GSSAPI incorrectly handled logical
conditions that are related to memory management operations.
An attacker could possibly use this issue to cause a denial of service.

Update instructions

After a standard system update you need to restart any application using Heimdal libraries to 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
20.04 focal libgssapi3-heimdal –  7.7.0+dfsg-1ubuntu1.4
18.04 bionic libgssapi3-heimdal –  7.5.0+dfsg-1ubuntu0.4
16.04 xenial libgssapi3-heimdal –  1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm4  
14.04 trusty libgssapi3-heimdal –  1.6~git20131207+dfsg-1ubuntu1.2+esm4  

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References

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