Samba 3.2.0 uses weak permissions (0666) for the (1) group_mapping.tdb and (2) group_mapping.ldb files, which allows local users to modify the membership of Unix groups.
bugs.debian.org/cgi-bin/bugreport.cgi?bug=496073
samba.org/samba/security/CVE-2008-3789.html
secunia.com/advisories/31601
www.openwall.com/lists/oss-security/2008/08/26/2
www.securityfocus.com/bid/30837
www.securitytracker.com/id?1020770
www.vupen.com/english/advisories/2008/2440
exchange.xforce.ibmcloud.com/vulnerabilities/44678