Ubuntu Security Notice 544-2 – USN-544-1 fixed two vulnerabilities in Samba. Fixes for CVE-2007-5398 are unchanged, but the upstream changes for CVE-2007-4572 introduced a regression in all releases which caused Linux smbfs mounts to fail. Additionally, Dapper and Edgy included an incomplete patch which caused configurations using NetBIOS to fail. A proper fix for these regressions does not exist at this time, and so the patch addressing CVE-2007-4572 has been removed. This vulnerability is believed to be an unexploitable denial of service, but a future update will address this issue. We apologize for the inconvenience.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/61117/USN-544-2.txt
Source: https://packetstormsecurity.com/files/61117/Ubuntu-Security-Notice-544-2.html