Vulnerability CVE-2013-4125
Published: 2013-07-15   Modified: 2013-07-16

Description:
The fib6_add_rt2node function in net/ipv6/ip6_fib.c in the IPv6 stack in the Linux kernel through 3.10.1 does not properly handle Router Advertisement (RA) messages in certain circumstances involving three routes that initially qualified for membership in an ECMP route set until a change occurred for one of the first two routes, which allows remote attackers to cause a denial of service (system crash) via a crafted sequence of messages.

See advisories in our WLB2 database:
Topic
Author
Date
Med.
Linux kernel ipv6 BUG_ON in fib6_add_rt2node()
Hannes Frederic ...
15.07.2013

Type:

CWE-399

 (Resource Management Errors)

CVSS2 => (AV:N/AC:H/Au:N/C:N/I:N/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5.4/10
6.9/10
4.9/10
Exploit range
Attack complexity
Authentication
Remote
High
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Complete
Affected software
Linux -> Linux kernel 

 References:
https://github.com/torvalds/linux/commit/307f2fb95e9b96b3577916e73d92e104f8f26494
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=307f2fb95e9b96b3577916e73d92e104f8f26494
https://bugzilla.redhat.com/show_bug.cgi?id=984664
http://www.openwall.com/lists/oss-security/2013/07/15/4
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