Vulnerability Details CVE-2002-0518
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.011
EPSS Ranking 77.2%
CVSS Severity
CVSS v2 Score 5.0
References
- ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-02:20.syncache.asc
- http://www.iss.net/security_center/static/8873.php
- http://www.iss.net/security_center/static/8875.php
- http://www.osvdb.org/6046
- http://www.securityfocus.com/bid/4524
- ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-02:20.syncache.asc
- http://www.iss.net/security_center/static/8873.php
- http://www.iss.net/security_center/static/8875.php
- http://www.osvdb.org/6046
- http://www.securityfocus.com/bid/4524