Ubuntu Update for krb5, librpcsecgss vulnerability USN-511-1

Summary
Ubuntu Update for Linux kernel vulnerabilities USN-511-1
Solution
Please Install the Updated Packages.
Insight
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.
Affected
krb5, librpcsecgss vulnerability on Ubuntu 6.06 LTS , Ubuntu 6.10 , Ubuntu 7.04