CVE-2022-20623: cisco cisco nx-os software Resource Management Errors
Vulnerability summary
CVE-2022-20623 is a high (CVSS 8.6) Resource Management Errors vulnerability in cisco cisco nx-os software. EPSS estimates a 11.86% chance of exploitation in the next 30 days, higher than 96% of scored vulnerabilities.
Timeline
- 23-02-2022PublishedVulnerability first disclosed.
- 06-11-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
3 scores · 2 sources · 2 versions- NVDNIST7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HDiffers
EPSS trend
Probability
11.86%
Chance of exploitation in the next 30 days
Percentile
96%
Versus all other CVEs
30-day change
0.00 pp
From 11.86% on 18-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Cisco2 products
- cisco nx-os softwaren/a
- nx-os≥ 7.0\(3\)i6\(2\), ≤ 7.0\(3\)i7\(3\) | ≥ 7.0\(3\)i6\(2\), ≤ 9.3\(8\) | ≥ 10.1\(1\), ≤ 10.2\(1\)
1 vendor · 2 products
References
1 links- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-bfd-dos-wGQXrzxnVendor AdvisoryX Refsource CISCO