Input validation error in Linux kernel - CVE-2013-4563
Published: November 20, 2013 / Updated: August 10, 2020
Vulnerability identifier: #VU42355
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2013-4563
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
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.
Affected software
Linux kernel
Ubuntu
linux (Ubuntu package)
linux-lts-saucy (Ubuntu package)
Ubuntu
linux (Ubuntu package)
linux-lts-saucy (Ubuntu package)
How to mitigate CVE-2013-4563
Install update from vendor's website.
linux (Ubuntu package) - update to 3.11.0-17.31
linux-lts-saucy (Ubuntu package) - update to 3.11.0-17.31~precise1
linux-lts-saucy (Ubuntu package) - update to 3.11.0-17.31~precise1
External 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