CVE-2023-20233
Description
A vulnerability in the Connectivity Fault Management (CFM) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to incorrect processing of invalid continuity check messages (CCMs). An attacker could exploit this vulnerability by sending crafted CCMs to an affected device. A successful exploit could allow the attacker to cause the CFM service to crash when a user displays information about maintenance end points (MEPs) for peer MEPs on an affected device.
How to fix
- cisco ios_xr7.5.4, 7.6.3, 7.7.21, 7.8.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| cisco ios_xr | v < 7.5.4, 7.6 ≤ v < 7.6.3, 7.7 ≤ v < 7.7.21, 7.8 ≤ v < 7.8.2, 7.9.0 | 7.5.4, 7.6.3, 7.7.21, 7.8.2 |
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.