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Ubuntu 20.04 USN-5766-1: heimdal Denial Of Service Threat

ubuntu
Calendar Grey December 7, 2022
Dist Ubuntu Esm H88
The Heimdal flaw impacts various Debian releases. Ensure updates are applied quickly to avoid system failures triggered by specific network requests.
Heimdal could be made to crash if it received specially crafted network traffic.

Summary

Heimdal could be made to crash if it received specially crafted

network traffic.

Software Description:

- 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.

Topics%20covered

Topics Covered

security advisory denial of service update instructions network traffic ubuntu heimdal service crash

Update Instructions

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

Ubuntu 20.04 LTS:
   libwind0-heimdal                7.7.0+dfsg-1ubuntu1.2

Ubuntu 18.04 LTS:
   libwind0-heimdal                7.5.0+dfsg-1ubuntu0.2

Ubuntu 16.04 ESM:
   libwind0-heimdal                1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm2

Ubuntu 14.04 ESM:
   libwind0-heimdal                1.6~git20131207+dfsg-1ubuntu1.2+esm2

After a standard system update you need to restart any application
using Heimdal libraries to make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-5766-1

CVE-2022-41916

Severity
important
Lowest
Low
Medium
High
Critical

December 07, 2022

Topics%20covered

Topics Covered

security advisory denial of service update instructions network traffic ubuntu heimdal service crash

Package Information

https://launchpad.net/ubuntu/+source/heimdal/7.7.0+dfsg-1ubuntu1.2
https://launchpad.net/ubuntu/+source/heimdal/7.5.0+dfsg-1ubuntu0.2

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