The installation process for NFS/ONCplus B.11.31_08 and earlier on HP HP-UX B.11.31 changes the NFS_SERVER setting in the nfsconf file, which might allow remote attackers to obtain filesystem access via NFS requests.
HP Security Bulletin - A potential security vulnerability has been identified with NFS/ONCplus running on HP-UX. The vulnerability could result in the inadvertent enabling of NFS.