The Winbind nss_info extension (nsswitch/idmap_ad.c) in idmap_ad.so in Samba 3.0.25 through 3.0.25c, when the "winbind nss info" option is set to rfc2307 or sfu, grants all local users the privileges of gid 0 when the (1) RFC2307 or (2) Services for UNIX (SFU) primary group attribute is not defined.
https://www.redhat.com/archives/fedora-package-announce/2007-September/msg00201.html
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10375
https://issues.rpath.com/browse/RPL-1705
https://exchange.xforce.ibmcloud.com/vulnerabilities/36560
http://www.vupen.com/english/advisories/2007/3120
http://www.us-cert.gov/cas/techalerts/TA07-352A.html
http://www.securitytracker.com/id?1018681
http://www.securityfocus.com/bid/25636
http://www.securityfocus.com/archive/1/479078/100/0/threaded
http://www.samba.org/samba/security/CVE-2007-4138.html
http://www.redhat.com/support/errata/RHSA-2007-1017.html
http://www.redhat.com/support/errata/RHSA-2007-1016.html
http://slackware.com/security/viewer.php?l=slackware-security&y=2007&m=slackware-security.419439
http://securityreason.com/securityalert/3135
http://secunia.com/advisories/26834
http://secunia.com/advisories/26795
http://secunia.com/advisories/26776