Home/CVE/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 befo
CVE

CVE-2021-22976

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 befo

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.

HIGH · CVSS 7.5 EPSS 0.00647
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
▤

Affected Products & Versions

10
f5 big-ip advanced web application firewall>= 12.1.0 and <= 12.1.5
f5 big-ip advanced web application firewall>= 13.1.0 and < 13.1.3.6
f5 big-ip advanced web application firewall>= 14.1.0 and < 14.1.3.1
f5 big-ip advanced web application firewall>= 15.1.0 and < 15.1.2
f5 big-ip advanced web application firewall>= 16.0.0 and < 16.0.1.1
f5 big-ip application security manager>= 12.1.0 and <= 12.1.5
f5 big-ip application security manager>= 13.1.0 and < 13.1.3.6
f5 big-ip application security manager>= 14.1.0 and < 14.1.3.1
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Scoring & Timeline

7.5
HIGH · CVSS v3.1 · f5sirt@f5.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD12 Feb 2021 · 06:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://support.f5.com/csp/article/K88230177Vendor Advisory
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