Cyber Resilience

CVE-2021-23031

CriticalRCE

Published: 14 September 2021

Published
14 September 2021
Modified
21 November 2024
KEV Added
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Patch
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CVSS Score v3.1 9.9 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS Score 0.0050 66.4th percentile
Risk Priority 20 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-23031 is a critical-severity OS Command Injection (CWE-78) vulnerability in F5 Big-Ip Advanced Web Application Firewall. Its CVSS base score is 9.9 (Critical).

Operationally, ranked in the top 33.6% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

On version 16.0.x before 16.0.1.2, 15.1.x before 15.1.3, 14.1.x before 14.1.4.1, 13.1.x before 13.1.4, 12.1.x before 12.1.6, and 11.6.x before 11.6.5.3, an authenticated user may perform a privilege escalation on the BIG-IP Advanced WAF and ASM Configuration utility. Note: Software…

more

versions which have reached End of Technical Support (EoTS) are not evaluated.

CWE(s)
CWE-78

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

f5
big-ip advanced web application firewall
11.6.1 — 11.6.5.2 · 12.1.0 — 12.1.5 · 13.1.0 — 13.1.3
f5
big-ip application security manager
11.6.1 — 11.6.5.2 · 12.1.0 — 12.1.5 · 13.1.0 — 13.1.3

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SC-27 Platform-independent Applications
addresses: CWE-78

Platform-independent apps typically execute inside a managed runtime or sandbox that restricts direct OS command execution, reducing the ability to exploit OS command injection.

SI-10 Information Input Validation
addresses: CWE-78

Validates inputs to block special elements that would alter OS command execution.

References