CVE-2000-0461
The undocumented semconfig system call in BSD freezes the state of semaphores, which allows local users to cause a denial of service of the semaphore system by using the semconfig call.
Date published : 2000-07-12
http://www.securityfocus.com/bid/1270
ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-00:19.semconfig.asc