The SYN cache (syncache) and SYN cookie (syncookie) mechanism in FreeBSD 4.5 and previous versions allows remote malicious users 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.
| Vulnerable Product | Search on Vulmon | Subscribe to Product |
|---|---|---|
freebsd freebsd 4.5 |
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