USN-3353-3: Heimdal vulnerability

24 July 2017

Heimdal could allow unintended access to network services.

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Releases

Packages

  • heimdal - Heimdal Kerberos Network Authentication Protocol

Details

USN-3353-1 fixed a vulnerability in Heimdal. This update provides
the corresponding updade for Ubuntu 12.04 ESM.

Original advisory 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.

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Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

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Update instructions

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

Ubuntu 12.04

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

References

Related notices

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