USN-999-1: Kerberos vulnerability

Ubuntu Security Notice USN-999-1

5th October, 2010

krb5 vulnerability

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

  • Ubuntu 10.10
  • Ubuntu 10.04 LTS

Summary

Remote authenticated users could crash the KDC.

Software description

  • krb5 - MIT Kerberos

Details

Mike Roszkowski discovered that the Kerberos KDC did not correctly
validate the contents of certain messages. If an authenticated remote
attacker sent specially crafted TGS requests, the KDC service would crash,
leading to a denial of service.

Update instructions

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

Ubuntu 10.10:
krb5-kdc 1.8.1+dfsg-5ubuntu0.1
Ubuntu 10.04 LTS:
krb5-kdc 1.8.1+dfsg-2ubuntu0.3

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References

CVE-2010-1322