CVE-2022-20623

Common vulnerabilities & exposures (CVE)

CVE database CVE database blogpost Release & EoL database

Published at: - 23-02-2022 07:15

Last modified: - 02-03-2022 04:37

Total changes: - 3

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Low

Attack complexity

Network

Attack vector

High

Availability

None

Confidentiality

None

Integrity

None

Privileges required

Unchanged

Scope

None

User interaction

7.5

Base score

3.9

3.6

Exploitability score

Impact score

Verification logic

AND

vendor=cisco AND product=nx-os AND versionEndIncluding=7.0\(3\)i7\(3\) AND versionStartIncluding=7.0\(3\)i6\(2\)

vendor=cisco AND product=n9k-c92160yc-x AND version=-

vendor=cisco AND product=n9k-c92300yc AND version=-

vendor=cisco AND product=n9k-c92304qc AND version=-

vendor=cisco AND product=n9k-c9232c AND version=-

vendor=cisco AND product=n9k-c92348gc-x AND version=-

vendor=cisco AND product=n9k-c9236c AND version=-

vendor=cisco AND product=n9k-c9272q AND version=-

vendor=cisco AND product=n9k-c93108tc-ex AND version=-

vendor=cisco AND product=n9k-c93108tc-fx AND version=-

vendor=cisco AND product=n9k-c9316d-gx AND version=-

vendor=cisco AND product=n9k-c93180lc-ex AND version=-

vendor=cisco AND product=n9k-c93180yc-ex AND version=-

vendor=cisco AND product=n9k-c93180yc-fx AND version=-

vendor=cisco AND product=n9k-c93180yc2-fx AND version=-

vendor=cisco AND product=n9k-c93216tc-fx2 AND version=-

vendor=cisco AND product=n9k-c93240yc-fx2 AND version=-

vendor=cisco AND product=n9k-c9332c AND version=-

vendor=cisco AND product=n9k-c93360yc-fx2 AND version=-

vendor=cisco AND product=n9k-c9336c-fx2 AND version=-

vendor=cisco AND product=n9k-c9348gc-fxp AND version=-

vendor=cisco AND product=n9k-c93600cd-gx AND version=-

vendor=cisco AND product=n9k-c9364c AND version=-

vendor=cisco AND product=n9k-c9364c-gx AND version=-

AND

vendor=cisco AND product=nx-os AND versionEndIncluding=9.3\(8\) AND versionStartIncluding=7.0\(3\)i6\(2\)

vendor=cisco AND product=nx-os AND versionEndIncluding=10.2\(1\) AND versionStartIncluding=10.1\(1\)

vendor=cisco AND product=n9k-x97160yc-ex AND version=-

vendor=cisco AND product=n9k-x97284yc-fx AND version=-

vendor=cisco AND product=n9k-x9732c-ex AND version=-

vendor=cisco AND product=n9k-x9732c-fx AND version=-

vendor=cisco AND product=n9k-x9736c-ex AND version=-

vendor=cisco AND product=n9k-x9736c-fx AND version=-

vendor=cisco AND product=n9k-x9788tc-fx AND version=-

Reference

20220223 Cisco Nexus 9000 Series Switches Bidirectional Forwarding Detection Denial of Service Vulnerability-Vendor Advisory

Keywords

CVE-2022-20623

Common vulnerabilities & exposures (CVE)

Description

Common Vulnerability Scoring System (CVSS)

Verification logic

Reference

NVD

CVE-2022-20623

CVE

Common vulnerabilities & exposures

CVSS

Common vulnerability scoring system

Security

Vulnerabilities

Exposures