CVE-2022-20623
Last modified
CVE-2022-20623 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 12.35% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Nx-Os | >= 7.0\(3\)i6\(2\), <= 7.0\(3\)i7\(3\) |
| Cisco | Nx-Os | >= 7.0\(3\)i6\(2\), <= 9.3\(8\) |
| Cisco | Nx-Os | >= 10.1\(1\), <= 10.2\(1\) |
References
Timeline
- Published
- Last Modified
- Status
- Modified
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