Ubuntu Security Notice USN-1088-1
15th March, 2011
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 10.10
- Ubuntu 10.04 LTS
- Ubuntu 9.10
MIT Kerberos 5 Key Distribution Center (KDC) daemon denial of service vulnerability.
- krb5 - MIT Kerberos master server (kadmind)
Cameron Meadors discovered that the MIT Kerberos 5 Key Distribution
Center (KDC) daemon is vulnerable to a double-free condition if
the Public Key Cryptography for Initial Authentication (PKINIT)
capability is enabled. This could allow a remote attacker to cause
a denial of service.
The problem can be corrected by updating your system to the following package version:
- Ubuntu 10.10:
- krb5-kdc 1.8.1+dfsg-5ubuntu0.6
- Ubuntu 10.04 LTS:
- krb5-kdc 1.8.1+dfsg-2ubuntu0.8
- Ubuntu 9.10:
- krb5-kdc 1.7dfsg~beta3-1ubuntu0.12
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.