nfs.ext in IBM AIX 5.3.x through 5.3.9 and 6.1.0 through 6.1.2 does not properly use the nfs_portmon setting, which allows remote attackers to bypass intended access restrictions for NFSv4 shares via unspecified vectors.
aix.software.ibm.com/aix/efixes/security/nfs4_advisory.asc
www-01.ibm.com/support/docview.wss?uid=isg1IZ49024
www-01.ibm.com/support/docview.wss?uid=isg1IZ49096
www-01.ibm.com/support/docview.wss?uid=isg1IZ49278
www-01.ibm.com/support/docview.wss?uid=isg1IZ50399
www-01.ibm.com/support/docview.wss?uid=isg1IZ50444
www-01.ibm.com/support/docview.wss?uid=isg1IZ50496
www.securityfocus.com/bid/36544
www.vupen.com/english/advisories/2009/2788
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6366