1. Ubuntu Security Notices
  2. USN-881-1

USN-881-1: Kerberos vulnerability

Publication date

12 January 2010

Overview

Kerberos vulnerability

Releases

Packages

Details

It was discovered that Kerberos did not correctly handle invalid AES
blocks. An unauthenticated remote attacker could send specially crafted
traffic that would crash the KDC service, leading to a denial of service,
or possibly execute arbitrary code with root privileges.

It was discovered that Kerberos did not correctly handle invalid AES
blocks. An unauthenticated remote attacker could send specially crafted
traffic that would crash the KDC service, leading to a denial of service,
or possibly execute arbitrary code with root privileges.

Update instructions

In general, a standard system upgrade is sufficient to effect 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
9.10 karmic libk5crypto3 –  1.7dfsg~beta3-1ubuntu0.3
9.04 jaunty libkrb53 –  1.6.dfsg.4~beta1-5ubuntu2.2
8.10 intrepid libkrb53 –  1.6.dfsg.4~beta1-3ubuntu0.3
8.04 hardy libkrb53 –  1.6.dfsg.3~beta1-2ubuntu1.3
6.06 dapper libkrb53 –  1.4.3-5ubuntu0.10

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References

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