CVE-2013-4563

Public Exploit

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.

Category

7.1
CVSS
Severity: High
CVSS 2.0 •
EPSS 1.84% Top 20%
Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory opensuse.org Vendor Advisory kernel.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.ubuntu.com/usn/USN-2113-1 third party advisory vendor advisory
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=0e033e04c2678dbbe74a46b23fffb7bb918c288e vendor advisory
http://www.ubuntu.com/usn/USN-2117-1 third party advisory vendor advisory
https://github.com/torvalds/linux/commit/0e033e04c2678dbbe74a46b23fffb7bb918c288e patch exploit
https://bugzilla.redhat.com/show_bug.cgi?id=1030015 issue tracking
http://lists.opensuse.org/opensuse-security-announce/2014-02/msg00003.html mailing list third party advisory vendor advisory
http://www.openwall.com/lists/oss-security/2013/11/13/9 mailing list patch

Frequently Asked Questions

What is the severity of CVE-2013-4563?
CVE-2013-4563 has been scored as a high severity vulnerability.
How to fix CVE-2013-4563?
To fix CVE-2013-4563, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2013-4563 being actively exploited in the wild?
It is possible that CVE-2013-4563 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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