The NFS daemon (aka nfsd) in Sun Solaris 10 and OpenSolaris before snv_106, when NFSv3 is used, does not properly implement combinations of security modes, which allows remote attackers to bypass intended access restrictions and read or modify files, as demonstrated by a combination of the sec=sys and sec=krb5 security modes, related to modes that "override each other."
https://exchange.xforce.ibmcloud.com/vulnerabilities/49171
http://www.vupen.com/english/advisories/2009/0814
http://www.vupen.com/english/advisories/2009/0657
http://support.avaya.com/elmodocs2/security/ASA-2009-096.htm
http://sunsolve.sun.com/search/document.do?assetkey=1-66-250306-1
http://sunsolve.sun.com/search/document.do?assetkey=1-21-139462-02-1
http://secunia.com/advisories/34435