Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| F5 | Big-Ip Advanced Web Application Firewall | >= 12.1.0, <= 12.1.5 |
| F5 | Big-Ip Application Security Manager | >= 12.1.0, <= 12.1.5 |
References
- https://support.f5.com/csp/article/K88230177Vendor Advisory
- https://support.f5.com/csp/article/K88230177Vendor Advisory
FAQ
What is CVE-2021-22976?
CVE-2021-22976 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 WebSo...
How severe is CVE-2021-22976?
CVE-2021-22976 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-22976?
Check the references section above for vendor advisories and patch information. Affected products include: F5 Big-Ip Advanced Web Application Firewall, F5 Big-Ip Application Security Manager.