USN-3353-1: Heimdal vulnerability

14 July 2017

Heimdal could allow unintended access to network services.

Releases

Packages

  • heimdal - Heimdal Kerberos Network Authentication Protocol

Details

Jeffrey Altman, Viktor Dukhovni, and Nicolas Williams discovered
that Heimdal clients incorrectly trusted unauthenticated portions
of Kerberos tickets. A remote attacker could use this to impersonate
trusted network services or perform other attacks.

Update instructions

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

Ubuntu 17.04
Ubuntu 16.10
Ubuntu 16.04
Ubuntu 14.04

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

References

Related notices