USN-755-1: Kerberos vulnerabilities

Releases

• Ubuntu 8.10
• Ubuntu 8.04
• Ubuntu 7.10
• Ubuntu 6.06

Packages

• krb5 -

Details

Multiple flaws were discovered in the Kerberos GSS-API and ASN.1 routines
that did not correctly handle certain requests. An unauthenticated remote
attacker could send specially crafted traffic to crash services using
the Kerberos library, leading to a denial of service.

Update instructions

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

Ubuntu 8.10

• libkrb53 - 1.6.dfsg.4~beta1-3ubuntu0.1
• libkadm55 - 1.6.dfsg.4~beta1-3ubuntu0.1

Ubuntu 8.04

• libkrb53 - 1.6.dfsg.3~beta1-2ubuntu1.1
• libkadm55 - 1.6.dfsg.3~beta1-2ubuntu1.1

Ubuntu 7.10

• libkrb53 - 1.6.dfsg.1-7ubuntu0.2
• libkadm55 - 1.6.dfsg.1-7ubuntu0.2

Ubuntu 6.06

• libkrb53 - 1.4.3-5ubuntu0.8
• libkadm55 - 1.4.3-5ubuntu0.8

After a standard system upgrade you need to restart any services using
the Kerberos libraries to effect the necessary changes.

References

• CVE-2009-0844
• CVE-2009-0845
• CVE-2009-0846
• CVE-2009-0847