Cyber Resilience

CVE-2021-23000

High

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 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0065 71.2th percentile
Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-23000 is a high-severity an unspecified weakness vulnerability in F5 Big-Ip Access Policy Manager. Its CVSS base score is 7.5 (High).

Operationally, ranked in the top 28.8% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

On BIG-IP versions 13.1.3.4-13.1.3.6 and 12.1.5.2, if the tmm.http.rfc.enforcement BigDB key is enabled in a BIG-IP system, or the Bad host header value is checked in the AFM HTTP security profile associated with a virtual server, in rare instances, a…

more

specific sequence of malicious requests may cause TMM to restart. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.

CWE(s)
NVD-CWE-noinfo

Related Threats

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

Affected Assets

f5
big-ip access policy manager
12.1.5.2 · 13.1.3.4 — 13.1.3.6
f5
big-ip advanced firewall manager
12.1.5.2 · 13.1.3.4 — 13.1.3.6
f5
big-ip advanced web application firewall
12.1.5.2 · 13.1.3.4 — 13.1.3.6
f5
big-ip analytics
12.1.5.2 · 13.1.3.4 — 13.1.3.6
f5
big-ip application acceleration manager
12.1.5.2 · 13.1.3.4 — 13.1.3.6
f5
big-ip application security manager
12.1.5.2 · 13.1.3.4 — 13.1.3.6
f5
big-ip ddos hybrid defender
12.1.5.2 · 13.1.3.4 — 13.1.3.6
f5
big-ip domain name system
12.1.5.2 · 13.1.3.4 — 13.1.3.6
f5
big-ip fraud protection service
12.1.5.2 · 13.1.3.4 — 13.1.3.6
f5
big-ip global traffic manager
12.1.5.2 · 13.1.3.4 — 13.1.3.6
+4 more product configuration(s) — see NVD for full list

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References