Cyber Resilience

CVE-2021-23001

Medium

Published: 31 March 2021

Published
31 March 2021
Modified
21 November 2024
KEV Added
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Patch
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CVSS Score v3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
EPSS Score 0.0025 48.1th percentile
Risk Priority 9 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-23001 is a medium-severity Unrestricted Upload of File with Dangerous Type (CWE-434) vulnerability in F5 Big-Ip Access Policy Manager. Its CVSS base score is 4.3 (Medium).

Operationally, ranked at the 48.1th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

On versions 16.0.x before 16.0.1.1, 15.1.x before 15.1.2.1, 14.1.x before 14.1.4, 13.1.x before 13.1.3.6, 12.1.x before 12.1.5.3, and 11.6.x before 11.6.5.3, the upload functionality in BIG-IP Advanced WAF and BIG-IP ASM allows an authenticated user to upload files to the…

more

BIG-IP system using a call to an undisclosed iControl REST endpoint. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.

CWE(s)
CWE-434

Related Threats

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

Affected Assets

f5
big-ip access policy manager
11.6.1 — 11.6.5.3 · 12.1.0 — 12.1.5.3 · 13.1.0 — 13.1.3.6
f5
big-ip advanced firewall manager
11.6.1 — 11.6.5.3 · 12.1.0 — 12.1.5.3 · 13.1.0 — 13.1.3.6
f5
big-ip advanced web application firewall
11.6.1 — 11.6.5.3 · 12.1.0 — 12.1.5.3 · 13.1.0 — 13.1.3.6
f5
big-ip analytics
11.6.1 — 11.6.5.3 · 12.1.0 — 12.1.5.3 · 13.1.0 — 13.1.3.6
f5
big-ip application acceleration manager
11.6.1 — 11.6.5.3 · 12.1.0 — 12.1.5.3 · 13.1.0 — 13.1.3.6
f5
big-ip application security manager
11.6.1 — 11.6.5.3 · 12.1.0 — 12.1.5.3 · 13.1.0 — 13.1.3.6
f5
big-ip ddos hybrid defender
11.6.1 — 11.6.5.3 · 12.1.0 — 12.1.5.3 · 13.1.0 — 13.1.3.6
f5
big-ip domain name system
11.6.1 — 11.6.5.3 · 12.1.0 — 12.1.5.3 · 13.1.0 — 13.1.3.6
f5
big-ip fraud protection service
11.6.1 — 11.6.5.3 · 12.1.0 — 12.1.5.3 · 13.1.0 — 13.1.3.6
f5
big-ip global traffic manager
11.6.1 — 11.6.5.3 · 12.1.0 — 12.1.5.3 · 13.1.0 — 13.1.3.6
+4 more product configuration(s) — see NVD for full list

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.

MP-7 Media Use
addresses: CWE-434

Requiring identifiable owners for portable devices reduces the attack surface for unrestricted uploads of dangerous file types via anonymous media.

SC-44 Detonation Chambers
addresses: CWE-434

Dangerous file uploads can be detonated in the chamber to determine malice before any production write or execution occurs.

SC-51 Hardware-based Protection
addresses: CWE-434

Prevents unrestricted writing of arbitrary or malicious firmware by keeping hardware write-protect enabled except under tightly controlled manual procedures.

SI-3 Malicious Code Protection
addresses: CWE-434

Scans files from external sources on download/open/execute, blocking unrestricted uploads of dangerous file types.

References