USN-587-1: Kerberos vulnerabilities

Releases

• Ubuntu 7.10
• Ubuntu 7.04
• Ubuntu 6.10
• Ubuntu 6.06

Packages

• 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 versions:

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

• libkrb53 - 1.4.3-5ubuntu0.7
• libkadm55 - 1.4.3-5ubuntu0.7

In general, a standard system upgrade is sufficient to effect the
necessary changes.

References

• CVE-2008-0062
• CVE-2008-0063
• CVE-2008-0947