The (1) CreateAccount, (2) OpenAccount, (3) AddAccountRights, and (4) RemoveAccountRights LSA RPC procedures in smbd in Samba 3.4.x before 3.4.17, 3.5.x before 3.5.15, and 3.6.x before 3.6.5 do not properly restrict modifications to the privileges database, which allows remote authenticated users to obtain the "take ownership" privilege via an LSA connection.
http://www.ubuntu.com/usn/USN-1434-1
http://www.securitytracker.com/id?1026988
http://www.samba.org/samba/security/CVE-2012-2111
http://www.mandriva.com/security/advisories?name=MDVSA-2012:067
http://www.debian.org/security/2012/dsa-2463
http://www.collax.com/produkte/AllinOne-server-for-small-businesses#id2565578
http://secunia.com/advisories/49030
http://secunia.com/advisories/49017
http://secunia.com/advisories/48999
http://secunia.com/advisories/48996
http://secunia.com/advisories/48984
http://secunia.com/advisories/48976
http://rhn.redhat.com/errata/RHSA-2012-0533.html
http://marc.info/?l=bugtraq&m=134323086902585&w=2
http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00003.html
http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00001.html
http://lists.opensuse.org/opensuse-security-announce/2012-04/msg00023.html
http://lists.fedoraproject.org/pipermail/package-announce/2012-May/079677.html
http://lists.fedoraproject.org/pipermail/package-announce/2012-May/079670.html
http://lists.fedoraproject.org/pipermail/package-announce/2012-May/079662.html