SGI Security Advisory 20030901-01-P – It has been reported that under certain conditions a NFS client can avoid read-only restrictions on filesystems exported via NFS from a server running IRIX 6.5.21 and mount them in read/write mode.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/31672/20030901-01-P
Source: https://packetstormsecurity.com/files/31672/HexView-Security-Advisory-2003-09-01.01.html