CVE-2013-4563 Information

Description

The udp6_ufo_fragment function in net/ipv6/udp_offload.c in the Linux kernel through 3.12 when UDP Fragmentation Offload (UFO) is enabled does not properly perform a certain size comparison before inserting a fragment header which allows remote attackers to cause a denial of service (panic) via a large IPv6 UDP packet as demonstrated by use of the Token Bucket Filter (TBF) queueing discipline.

Reference

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=0e033e04c2678dbbe74a46b23fffb7bb918c288e http://lists.opensuse.org/opensuse-security-announce/2014-02/msg00003.html http://www.openwall.com/lists/oss-security/2013/11/13/9 http://www.ubuntu.com/usn/USN-2113-1 http://www.ubuntu.com/usn/USN-2117-1 https://bugzilla.redhat.com/show_bug.cgi?id=1030015 https://github.com/torvalds/linux/commit/0e033e04c2678dbbe74a46b23fffb7bb918c288e