USN-511-2: Kerberos vulnerability

Releases

• Ubuntu 7.04
• Ubuntu 6.10
• Ubuntu 6.06

Packages

• krb5 -
• librpcsecgss -

Details

USN-511-1 fixed vulnerabilities in krb5 and librpcsecgss. The fixes were
incomplete, and only reduced the scope of the vulnerability, without fully
solving it. This update fixes the problem.

Original advisory details:

It was discovered that the libraries handling RPCSEC_GSS did not correctly
validate the size of certain packet structures. An unauthenticated remote
user could send a specially crafted request and execute arbitrary code
with root privileges.

Update instructions

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

Ubuntu 7.04

• librpcsecgss3 - 0.14-2ubuntu1.2
• libkadm55 - 1.4.4-5ubuntu3.3

Ubuntu 6.10

• librpcsecgss2 - 0.13-2ubuntu0.2
• libkadm55 - 1.4.3-9ubuntu1.5

Ubuntu 6.06

• librpcsecgss1 - 0.7-0ubuntu1.2
• libkadm55 - 1.4.3-5ubuntu0.6

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

References

• CVE-2007-4743