A vulnerability has been reported in FreeBSD, which can be exploited by malicious people to cause a DoS (Denial of Service).
The vulnerability is caused due to an error in the "ipfw" module when handling IP fragments. This can be exploited to crash the firewall by sending ICMP IP fragments to the firewall that match any of the "reset", "reject" or "unreach" actions.
The vulnerability has been reported in FreeBSD 6.0-RELEASE.
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Subject: FreeBSD ipfw IP Fragment Denial of Service Vulnerability
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