Ubuntu Security Notice USN-587-1
18th March, 2008
krb5 vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 7.10
- Ubuntu 7.04
- Ubuntu 6.10
- Ubuntu 6.06 LTS
Software description
- krb5
Details
It was discovered that krb5 did not correctly handle certain krb4
requests. An unauthenticated remote attacker could exploit this flaw
by sending a specially crafted traffic, which could expose sensitive
information, cause a crash, or execute arbitrary code. (CVE-2008-0062,
CVE-2008-0063)
A flaw was discovered in the kadmind service's handling of file
descriptors. An unauthenticated remote attacker could send specially
crafted requests that would cause a crash, resulting in a denial of
service. Only systems with configurations allowing large numbers of
open file descriptors were vulnerable. (CVE-2008-0947)
Update instructions
The problem can be corrected by updating your system to the following package version:
- Ubuntu 7.10:
- libkrb53 1.6.dfsg.1-7ubuntu0.1
- libkadm55 1.6.dfsg.1-7ubuntu0.1
- Ubuntu 7.04:
- libkrb53 1.4.4-5ubuntu3.4
- libkadm55 1.4.4-5ubuntu3.4
- Ubuntu 6.10:
- libkrb53 1.4.3-9ubuntu1.6
- libkadm55 1.4.3-9ubuntu1.6
- Ubuntu 6.06 LTS:
- libkrb53 1.4.3-5ubuntu0.7
- libkadm55 1.4.3-5ubuntu0.7
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system upgrade is sufficient to effect the
necessary changes.