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Overview

Vulnerability Score 5.0 5.0
CVE Id CVE-2002-0518
Last Modified 05 Sep 2008 04:28:14
Published 12 Aug 2002 12:00:00
Confidentiality Impact NONE NONE
Integrity Impact NONE NONE
Availability Impact PARTIAL PARTIAL
Access Vector NETWORK
Access Complexity LOW
Authentication NONE

CVE-2002-0518

Summary

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.

Vulnerable Systems

Operating System

  • Freebsd 4.5


References

BID - 4524

XF - bsd-syncache-inpcb-dos(8875)

FREEBSD - FreeBSD-SA-02:20

OSVDB - 6046

XF - bsd-syncookie-pointer-dos(8873)


Last Updated: 27 May 2016 10:36:57