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FreeBSD Security Advisory (FreeBSD-SA-06:04.ipfw.asc)
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
The remote host is missing an update to the system as announced in the referenced advisory FreeBSD-SA-06:04.ipfw.asc
Insight
Insight
ipfw(8) is a system facility which provides IP packet filtering, accounting, and redirection. Among the many features, while discarding packets it can perform actions defined by the user, such as sending back TCP reset or ICMP unreachable packets. These operations can be performed by using the reset, reject or uncreach actions. The firewall maintains a pointer to layer 4 header information in the event that it needs to send a TCP reset or ICMP error message to discard packets. Due to incorrect handling of IP fragments, this pointer fails to get initialized.
Solution
Solution
Upgrade your system to the appropriate stable release or security branch dated after the correction date https://secure1.securityspace.com/smysecure/catid.html?in=FreeBSD-SA-06:04.ipfw.asc