USN-1290-1: Kerberos vulnerability

8 December 2011

krb5 vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 11.10


The Kerberos Key Distribution Center (KDC) could be made to crash.

Software Description

  • krb5 - MIT Kerberos Network Authentication Protocol


Simo Sorce discovered that a NULL pointer dereference existed in the Kerberos Key Distribution Center (KDC). An authenticated remote attacker could use this to cause a denial of service.

Update instructions

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

Ubuntu 11.10
krb5-kdc - 1.9.1+dfsg-1ubuntu2.2

To update your system, please follow these instructions:

In general, a standard system update will make all the necessary changes.