A vulnerability in the Common Open Policy Service (COPS) of Cisco IOS XE Software for Cisco cBR-8 Converged Broadband Routers could allow an unauthenticated, remote attacker to cause resource exhaustion, resulting in a denial of service (DoS) condition. This vulnerability is due to a deadlock condition in the code when processing COPS packets under certain conditions. An attacker could exploit this vulnerability by sending COPS packets with high burst rates to an affected device. A successful exploit could allow the attacker to cause the CPU to consume excessive resources, which prevents other control plane processes from obtaining resources and results in a DoS.
Weakness
The product contains multiple threads or executable segments that are waiting for each other to release a necessary lock, resulting in deadlock.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Ios_xe | Cisco | * | 16.12.1z1 (excluding) |
| Ios_xe | Cisco | 17.3.1x (including) | 17.3.1x (including) |