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critical9.8Known exploited

CVE-2021-22991

F5 BIG-IP Traffic Management Microkernel Buffer Overflow

Exploited in the wild

This vulnerability is on a Known Exploited Vulnerabilities catalogue, added 2022-01-18. Federal due date: 2022-02-01.

Apply updates per vendor instructions.

Impact

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.

Affected products

VendorProductAffected versions
F5Big-Ip Access Policy Manager
from 12.1.0 before 12.1.5.3
from 13.1.0 before 13.1.3.6
from 14.1.0 before 14.1.4
from 15.1.0 before 15.1.2.1
from 16.0.0 before 16.0.1.1
F5Big-Ip Advanced Firewall Manager
from 12.1.0 before 12.1.5.3
from 13.1.0 before 13.1.3.6
from 14.1.0 before 14.1.4
from 15.1.0 before 15.1.2.1
from 16.0.0 before 16.0.1.1
F5Big-Ip Advanced Web Application Firewall
from 12.1.0 before 12.1.5.3
from 13.1.0 before 13.1.3.6
from 14.1.0 before 14.1.4
from 15.1.0 before 15.1.2.1
from 16.0.0 before 16.0.1.1
F5Big-Ip Analytics
from 12.1.0 before 12.1.5.3
from 13.1.0 before 13.1.3.6
from 14.1.0 before 14.1.4
from 15.1.0 before 15.1.2.1
from 16.0.0 before 16.0.1.1
F5Big-Ip Application Acceleration Manager
from 12.1.0 before 12.1.5.3
from 13.1.0 before 13.1.3.6
from 14.1.0 before 14.1.4
from 15.1.0 before 15.1.2.1
from 16.0.0 before 16.0.1.1
F5Big-Ip Application Security Manager
from 12.1.0 before 12.1.5.3
from 13.1.0 before 13.1.3.6
from 14.1.0 before 14.1.4
from 15.1.0 before 15.1.2.1
from 16.0.0 before 16.0.1.1
F5Big-Ip Ddos Hybrid Defender
from 12.1.0 before 12.1.5.3
from 13.1.0 before 13.1.3.6
from 14.1.0 before 14.1.4
from 15.1.0 before 15.1.2.1
from 16.0.0 before 16.0.1.1
F5Big-Ip Domain Name System
from 12.1.0 before 12.1.5.3
from 13.1.0 before 13.1.3.6
from 14.1.0 before 14.1.4
from 15.1.0 before 15.1.2.1
from 16.0.0 before 16.0.1.1
F5Big-Ip Fraud Protection Service
from 12.1.0 before 12.1.5.3
from 13.1.0 before 13.1.3.6
from 14.1.0 before 14.1.4
from 15.1.0 before 15.1.2.1
from 16.0.0 before 16.0.1.1
F5Big-Ip Global Traffic Manager
from 12.1.0 before 12.1.5.3
from 13.1.0 before 13.1.3.6
from 14.1.0 before 14.1.4
from 15.1.0 before 15.1.2.1
from 16.0.0 before 16.0.1.1
F5Big-Ip Link Controller
from 12.1.0 before 12.1.5.3
from 13.1.0 before 13.1.3.6
from 14.1.0 before 14.1.4
from 15.1.0 before 15.1.2.1
from 16.0.0 before 16.0.1.1
F5Big-Ip Local Traffic Manager
from 12.1.0 before 12.1.5.3
from 13.1.0 before 13.1.3.6
from 14.1.0 before 14.1.4
from 15.1.0 before 15.1.2.1
from 16.0.0 before 16.0.1.1

Weakness classification

CWE-119

References