Excessive CPU Usage in BIG-IP Advanced WAF and ASM by F5 Networks
CVE-2021-22976

7.5HIGH

Key Information:

Vendor
F5
Status
Big-ip Advanced Waf & Big-ip Asm
Vendor
CVE Published:
12 February 2021

Summary

A resource exhaustion vulnerability exists in specific versions of the F5 BIG-IP Advanced WAF and ASM systems. When handling WebSocket requests that contain JSON payloads, an unusually high number of parameters can lead to excessive CPU consumption within the BIG-IP ASM bd process. This excessive usage could potentially result in performance degradation and impact the overall functionality of the firewall, allowing for potential denial of service scenarios.

Affected Version(s)

BIG-IP Advanced WAF & BIG-IP ASM 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

References

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

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.