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.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2013-4125 from the MITRE CVE dictionary dictionary and NIST NVD.
Not vulnerable.
This issue did not affect the kernel packages as shipped with Red Hat Enterprise Linux 5, 6 and Red Hat Enterprise MRG 2.
NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.
| Base Score | 7.1 |
|---|---|
| Base Metrics | AV:N/AC:M/Au:N/C:N/I:N/A:C |
| Access Vector | Network |
| Access Complexity | Medium |
| Authentication | None |
| Confidentiality Impact | None |
| Integrity Impact | None |
| Availability Impact | Complete |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise MRG 2 | realtime-kernel | Affected |
| Red Hat Enterprise Linux 7 | kernel | Affected |
| Red Hat Enterprise Linux 6 | kernel | Not affected |
| Red Hat Enterprise Linux 5 | kernel | Not affected |
Vulmon