Bjoern A. Zeeb

**Name of the Vulnerable Software and Affected Versions** FreeBSD versions 6.3 through 7.1 NetBSD versions 3.0 through 4.0 **Description** The issue is related to the improper checking of the proposed new MTU in an ICMPv6 Packet Too Big Message. This allows remote attackers to cause a denial of service, resulting in a system panic, via a crafted Packet Too Big Message. **Recommendations** For FreeBSD versions 6.3 through 7.1, update to a version that properly checks the proposed new MTU in an ICMPv6 Packet Too Big Message. For NetBSD versions 3.0 through 4.0, update to a version that properly checks the proposed new MTU in an ICMPv6 Packet Too Big Message.