Ubuntu Security Notice 460-2 – USN-460-1 fixed several vulnerabilities in Samba. The upstream changes for CVE-2007-2444 had an unexpected side-effect in Feisty. Shares configured with the “force group” option no longer behaved correctly.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/56919/USN-460-2.txt
Source: https://packetstormsecurity.com/files/56919/Ubuntu-Security-Notice-460-2.html