Sun Solaris 10 with the 120011-04 and 120012-04 patches, and later 120011-* and 120012-* patches, allows remote attackers to bypass certain netgroup restrictions and obtain root access to a filesystem via NFS requests from a client root user.
http://secunia.com/advisories/28096
http://sunsolve.sun.com/search/document.do?assetkey=1-26-103162-1
http://sunsolve.sun.com/search/document.do?assetkey=1-66-201317-1
http://www.securityfocus.com/bid/26872
http://www.securitytracker.com/id?1019102