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USN-6467-1 fixed a vulnerability in Kerberos. This update provides the
corresponding update for Ubuntu 20.04 LTS, Ubuntu 22.04 LTS and Ubuntu
23.04.

Original advisory details:

Robert Morris discovered that Kerberos did not properly handle memory
access when processing RPC data through kadmind, which could lead to the
freeing of uninitialized memory. An authenticated remote attacker could
possibly use this issue to cause kadmind to crash, resulting in a denial
of service.

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