CVE-2013-4125

Published: 15 July 2013

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.

From the Ubuntu security team

Hannes Frederic Sowa discovered that the Linux kernel's IPv6 stack does not correctly handle Router Advertisement (RA) message in some cases. A remote attacker could exploit this flaw to cause a denial of service (system crash).

Status

References

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-4125
• 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
• https://ubuntu.com/security/notices/USN-1935-1
• https://ubuntu.com/security/notices/USN-1936-1
• NVD
• Launchpad
• Debian

Bugs

• https://launchpad.net/bugs/1202990