addnetpr in SGI IRIX 6.2 and earlier allows local users to modify arbitrary files and possibly gain root access via a symlink attack on a temporary file.
addnetpr in IRIX 5.3 and 6.2 allows local users to overwrite arbitrary files and possibly gain root privileges via a symlink attack on the printers temporary file.
netprint in SGI IRIX 6.4 and earlier trusts the PATH environmental variable for finding and executing the disable program, which allows local users to gain privileges.