CRITICAL🚩 CISA KEV⚡ EXPLOIT🇵🇱 Wersja polska

CVE-2021-22991

CVSS 9.8v3.1pub. 2021-03-31upd. 2025-10-27

On 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.

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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

F5 Big Ip Access Policy Manager
APP
F5
12.1.0 – 12.1.5.3 (excl.)13.1.0 – 13.1.3.6 (excl.)14.1.0 – 14.1.4 (excl.)15.1.0 – 15.1.2.1 (excl.)16.0.0 – 16.0.1.1 (excl.)
F5 Big Ip Advanced Firewall Manager
APP
F5
12.1.0 – 12.1.5.3 (excl.)13.1.0 – 13.1.3.6 (excl.)14.1.0 – 14.1.4 (excl.)15.1.0 – 15.1.2.1 (excl.)16.0.0 – 16.0.1.1 (excl.)
F5 Big Ip Advanced Web Application Firewall
APP
F5
12.1.0 – 12.1.5.3 (excl.)13.1.0 – 13.1.3.6 (excl.)14.1.0 – 14.1.4 (excl.)15.1.0 – 15.1.2.1 (excl.)16.0.0 – 16.0.1.1 (excl.)
F5 Big Ip Analytics
APP
F5
12.1.0 – 12.1.5.3 (excl.)13.1.0 – 13.1.3.6 (excl.)14.1.0 – 14.1.4 (excl.)15.1.0 – 15.1.2.1 (excl.)16.0.0 – 16.0.1.1 (excl.)
F5 Big Ip Application Acceleration Manager
APP
F5
12.1.0 – 12.1.5.3 (excl.)13.1.0 – 13.1.3.6 (excl.)14.1.0 – 14.1.4 (excl.)15.1.0 – 15.1.2.1 (excl.)16.0.0 – 16.0.1.1 (excl.)
F5 Big Ip Application Security Manager
APP
F5
12.1.0 – 12.1.5.3 (excl.)13.1.0 – 13.1.3.6 (excl.)14.1.0 – 14.1.4 (excl.)15.1.0 – 15.1.2.1 (excl.)16.0.0 – 16.0.1.1 (excl.)
F5 Big Ip Ddos Hybrid Defender
APP
F5
12.1.0 – 12.1.5.3 (excl.)13.1.0 – 13.1.3.6 (excl.)14.1.0 – 14.1.4 (excl.)15.1.0 – 15.1.2.1 (excl.)16.0.0 – 16.0.1.1 (excl.)
F5 Big Ip Domain Name System
APP
F5
12.1.0 – 12.1.5.3 (excl.)13.1.0 – 13.1.3.6 (excl.)14.1.0 – 14.1.4 (excl.)15.1.0 – 15.1.2.1 (excl.)16.0.0 – 16.0.1.1 (excl.)
F5 Big Ip Fraud Protection Service
APP
F5
12.1.0 – 12.1.5.3 (excl.)13.1.0 – 13.1.3.6 (excl.)14.1.0 – 14.1.4 (excl.)15.1.0 – 15.1.2.1 (excl.)16.0.0 – 16.0.1.1 (excl.)
F5 Big Ip Global Traffic Manager
APP
F5
12.1.0 – 12.1.5.3 (excl.)13.1.0 – 13.1.3.6 (excl.)14.1.0 – 14.1.4 (excl.)15.1.0 – 15.1.2.1 (excl.)16.0.0 – 16.0.1.1 (excl.)
F5 Big Ip Link Controller
APP
F5
12.1.0 – 12.1.5.3 (excl.)13.1.0 – 13.1.3.6 (excl.)14.1.0 – 14.1.4 (excl.)15.1.0 – 15.1.2.1 (excl.)16.0.0 – 16.0.1.1 (excl.)
F5 Big Ip Local Traffic Manager
APP
F5
12.1.0 – 12.1.5.3 (excl.)13.1.0 – 13.1.3.6 (excl.)14.1.0 – 14.1.4 (excl.)15.1.0 – 15.1.2.1 (excl.)16.0.0 – 16.0.1.1 (excl.)
F5 Big Ip Policy Enforcement Manager
APP
F5
12.1.0 – 12.1.5.3 (excl.)13.1.0 – 13.1.3.6 (excl.)14.1.0 – 14.1.4 (excl.)15.1.0 – 15.1.2.1 (excl.)16.0.0 – 16.0.1.1 (excl.)
F5 Ssl Orchestrator
APP
F5
12.1.0 – 12.1.5.3 (excl.)13.1.0 – 13.1.3.6 (excl.)14.1.0 – 14.1.4 (excl.)15.1.0 – 15.1.2.1 (excl.)16.0.0 – 16.0.1.1 (excl.)

CISA KEV — detailsi

Vendori: F5 ↗
Producti: BIG-IP Traffic Management Microkernel
Added to KEVi: January 18, 2022
Remediation deadline (US Federal)i: February 1, 2022(overdue)

🔧Advisory F5↗🇺🇸CISA KEV (original)↗

Required action (CISA)i

Apply updates per vendor instructions.

CISA descriptioni

The Traffic Management Microkernel of BIG-IP ASM Risk Engine has a buffer overflow vulnerability, leading to a bypassing of URL-based access controls.

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