CVE-2022-20623
Description
A vulnerability in the rate limiter for Bidirectional Forwarding Detection (BFD) traffic of Cisco NX-OS Software for Cisco Nexus 9000 Series Switches could allow an unauthenticated, remote attacker to cause BFD traffic to be dropped on an affected device. This vulnerability is due to a logic error in the BFD rate limiter functionality. An attacker could exploit this vulnerability by sending a crafted stream of traffic through the device. A successful exploit could allow the attacker to cause BFD traffic to be dropped, resulting in BFD session flaps. BFD session flaps can cause route instability and dropped traffic, resulting in a denial of service (DoS) condition. This vulnerability applies to both IPv4 and IPv6 traffic.
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| cisco nx-os | 7.0\(3\)i6\(2\) ≤ v ≤ 7.0\(3\)i7\(3\), 7.0\(3\)i6\(2\) ≤ v ≤ 9.3\(8\), 10.1\(1\) ≤ v ≤ 10.2\(1\) | — |
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