CVE-2013-4563

HIGH

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.

References

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

Details

Source: MITRE

Published: 2013-11-20

Updated: 2014-03-06

Type: CWE-189

Risk Information

CVSS v2.0

Base Score: 7.1

Vector: (AV:N/AC:M/Au:N/C:N/I:N/A:C)

Impact Score: 6.9

Exploitability Score: 8.6

Severity: HIGH