1. Ubuntu Security Notices
  2. USN-5766-1

USN-5766-1: Heimdal vulnerability

Publication date

7 December 2022

Overview

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

Releases

Packages

  • heimdal - Heimdal Kerberos Network Authentication Protocol

Details

It was discovered that Heimdal did not properly manage memory when
normalizing Unicode. An attacker could possibly use this issue to
cause a denial of service.

It was discovered that Heimdal did not properly manage memory when
normalizing Unicode. 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 libwind0-heimdal –  7.7.0+dfsg-1ubuntu1.2
18.04 bionic libwind0-heimdal –  7.5.0+dfsg-1ubuntu0.2
16.04 xenial libwind0-heimdal –  1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm2  
14.04 trusty libwind0-heimdal –  1.6~git20131207+dfsg-1ubuntu1.2+esm2  

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References

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