fsr_efs in IRIX 6.5 allows local users to conduct unauthorized file activities via a symlink attack, possibly via the .fsrlast file.
ftp://patches.sgi.com/support/free/security/advisories/20020903-01-P
ftp://patches.sgi.com/support/free/security/advisories/20020903-02-P
ftp://patches.sgi.com/support/free/security/advisories/20021103-01-P
ftp://patches.sgi.com/support/free/security/advisories/20021103-02-P
www.ciac.org/ciac/bulletins/n-004.shtml
www.iss.net/security_center/static/10275.php
www.osvdb.org/8579
www.securityfocus.com/bid/5897