Junglewise Threat Intelligence

CVE-2021-22991: F5 BIG-IP Traffic Management Microkernel Buffer Overflow

CVE-2021-22991 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2022-01-18

Vendors: F5.

Executive brief

A buffer overflow vulnerability exists in the F5 BIG-IP Traffic Management Microkernel (TMM) URI normalization process when handling undisclosed requests to a virtual server. This flaw can lead to a denial-of-service (DoS) attack, bypass of URL-based access controls, or potentially remote code execution (RCE).

Affected products

  • F5 BIG-IP ASM Risk Engine 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

Timeline

  • 2021-03-31: disclosed: NVD Published Date
  • 2022-01-18: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
  • 2022-01-18: exploited: Reported as exploited in the wild in advisory metadata