cpe:/o:freebsd:freebsd:4.5:release cpe:/o:freebsd:freebsd:4.5:stable CVE-2002-0518 2002-08-12T00:00:00.000-04:00 2008-09-05T16:28:14.257-04:00 5.0 NETWORK LOW NONE NONE NONE PARTIAL http://nvd.nist.gov 2004-01-01T00:00:00.000-05:00 BID 4524 OSVDB 6046 FREEBSD FreeBSD-SA-02:20 XF bsd-syncache-inpcb-dos(8875) XF bsd-syncookie-pointer-dos(8873) The SYN cache (syncache) and SYN cookie (syncookie) mechanism in FreeBSD 4.5 and earlier allows remote attackers to cause a denial of service (crash) (1) via a SYN packet that is accepted using syncookies that causes a null pointer to be referenced for the socket's TCP options, or (2) by killing and restarting a process that listens on the same socket, which does not properly clear the old inpcb pointer on restart.