CVE-2021-22991

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Summary

CVECVE-2021-22991
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-03-31 18:15:00 UTC
Updated2023-08-08 14:21:00 UTC
DescriptionOn BIG-IP 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, and 12.1.x before 12.1.5.3, undisclosed requests to a virtual server may be incorrectly handled by the Traffic Management Microkernel (TMM) URI normalization, which may trigger a buffer overflow, resulting in a DoS attack. In certain situations, it may theoretically allow bypass of URL based access control or remote code execution (RCE). Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.

Risk And Classification

EPSS: 0.730950000 probability, percentile 0.987750000 (date 2026-04-02)

CISA KEV: Listed on 2022-01-18; due 2022-02-01; ransomware use Unknown

Problem Types: CWE-119

CISA Known Exploited Vulnerability

VendorF5
ProductBIG-IP Traffic Management Microkernel
NameF5 BIG-IP Traffic Management Microkernel Buffer Overflow
Required ActionApply updates per vendor instructions.
Noteshttps://nvd.nist.gov/vuln/detail/CVE-2021-22991

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application F5 Big-ip Access Policy Manager All All All All
Application F5 Big-ip Advanced Firewall Manager All All All All
Application F5 Big-ip Advanced Web Application Firewall All All All All
Application F5 Big-ip Analytics All All All All
Application F5 Big-ip Application Acceleration Manager All All All All
Application F5 Big-ip Application Security Manager All All All All
Application F5 Big-ip Ddos Hybrid Defender All All All All
Application F5 Big-ip Domain Name System All All All All
Application F5 Big-ip Fraud Protection Service All All All All
Application F5 Big-ip Global Traffic Manager All All All All
Application F5 Big-ip Link Controller All All All All
Application F5 Big-ip Local Traffic Manager All All All All
Application F5 Big-ip Policy Enforcement Manager All All All All
Application F5 Ssl Orchestrator All All All All

References

ReferenceSourceLinkTags
support.f5.com/csp/article/K56715231 MISC support.f5.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
CISA Known Exploited Vulnerabilities catalog CISA www.cisa.gov kev

Legacy QID Mappings

  • 375749 F5 BIG-IP ASM,LTM,APM BIG-IP Traffic Management Microkernel (TMM) Buffer Overflow Vulnerability (K56715231)
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