CVE-2021-1268
Description
A vulnerability in the IPv6 protocol handling of the management interfaces of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause an IPv6 flood on the management interface network of an affected device. The vulnerability exists because the software incorrectly forwards IPv6 packets that have an IPv6 node-local multicast group address destination and are received on the management interfaces. An attacker could exploit this vulnerability by connecting to the same network as the management interfaces and injecting IPv6 packets that have an IPv6 node-local multicast group address destination. A successful exploit could allow the attacker to cause an IPv6 flood on the corresponding network. Depending on the number of Cisco IOS XR Software nodes on that network segment, exploitation could cause excessive network traffic, resulting in network degradation or a denial of service (DoS) condition.
How to fix
- cisco ios_xr6.7.3, 7.1.3, 7.2.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| cisco ios_xr | v < 6.7.3, 7.1.0 ≤ v < 7.1.3, 7.2.0 ≤ v < 7.2.2, 7.3.0 | 6.7.3, 7.1.3, 7.2.2 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.