Vulnerability in Freebsd

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.

EPSS: 0.025 (82.8th percentile) — read the EPSS interpretation.

Affected products

Freebsd — versions 4.5
N/a — versions n/a

References

cve@mitre.org (x_refsource_OSVDB, vdb-entry)
cve@mitre.org (vdb-entry, x_refsource_XF)
cve@mitre.org (Patch, vdb-entry, Vendor Advisory, x_refsource_XF)
cve@mitre.org (Patch, vdb-entry, x_refsource_BID, Vendor Advisory)