CVE-2021-22976

Published: Feb 12, 2021Modified: Jun 17, 2026

7.5

Vector

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

Exploitability: 3.9 / Impact: 3.6

Source: NVD

Description

On BIG-IP Advanced WAF and ASM version 16.0.x before 16.0.1.1, 15.1.x before 15.1.2, 14.1.x before 14.1.3.1, 13.1.x before 13.1.3.6, and all 12.1.x versions, when the BIG-IP ASM system processes WebSocket requests with JSON payloads, an unusually large number of parameters can cause excessive CPU usage in the BIG-IP ASM bd process. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.

Affected (10)

Products: F5: Big Ip Advanced Web Application Firewall, Big Ip Application Security Manager

2 products

Big Ip Advanced Web Application Firewall

Big Ip Application Security Manager

Configuration A

10 vulnerable

Vulnerable Software	Affected Versions
F5 Big Ip Advanced Web Application Firewall	12.1.0 ≤ version ≤ 12.1.5
F5 Big Ip Advanced Web Application Firewall	13.1.0 ≤ version < 13.1.3.6
F5 Big Ip Advanced Web Application Firewall	14.1.0 ≤ version < 14.1.3.1
F5 Big Ip Advanced Web Application Firewall	15.1.0 ≤ version < 15.1.2
F5 Big Ip Advanced Web Application Firewall	16.0.0 ≤ version < 16.0.1.1
F5 Big Ip Application Security Manager	12.1.0 ≤ version ≤ 12.1.5
F5 Big Ip Application Security Manager	13.1.0 ≤ version < 13.1.3.6
F5 Big Ip Application Security Manager	14.1.0 ≤ version < 14.1.3.1
F5 Big Ip Application Security Manager	15.1.0 ≤ version < 15.1.2
F5 Big Ip Application Security Manager	16.0.0 ≤ version < 16.0.1.1

References (2)

https://support.f5.com/csp/article/K88230177

Source: f5sirt@f5.com

Vendor Advisory

https://support.f5.com/csp/article/K88230177

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

Timeline

No history available yet.