Vulnerability in xfsdump in SGI IRIX may allow local users to obtain root privileges via the bck.log log file, possibly via a symlink attack.
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.
rdist in various UNIX systems uses popen to execute sendmail, which allows local users to gain root privileges by modifying the IFS (Internal Field Separator) variable.