IPv6 UDP Fragmentation Offload (UFO) Vulnerability

CVE-2013-4563 · HIGH Severity

AV:N/AC:M/AU:N/C:N/I:N/A:C

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.

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