SB2013112011 - Input validation error in Linux kernel
Published: November 20, 2013 Updated: August 10, 2020
Security Bulletin ID
SB2013112011
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Input validation error (CVE-ID: CVE-2013-4563)
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.
Remediation
Install update from vendor's website.
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