Ubuntu Update for pam vulnerability USN-959-1

Summary
Ubuntu Update for Linux kernel vulnerabilities USN-959-1
Solution
Please Install the Updated Packages.
Insight
Denis Excoffier discovered that the PAM MOTD module in Ubuntu did not correctly handle path permissions when creating user file stamps. A local attacker could exploit this to gain root privilieges.
Affected
pam vulnerability on Ubuntu 9.10 , Ubuntu 10.04 LTS