Heap-based buffer overflow in the name services daemon (nsd) in SGI IRIX 6.5.x through 6.5.21f, and possibly earlier versions, allows attackers to gain root privileges via the AUTH_UNIX gid list.
https://exchange.xforce.ibmcloud.com/vulnerabilities/12763
http://www.securityfocus.com/bid/8304
http://www.kb.cert.org/vuls/id/682900
http://www.ciac.org/ciac/bulletins/n-130.shtml