CVE-2016-6876: F5 BIG-IP Access Policy Manager

High severity, CVSS 7.5. EPSS: 1.6% chance of exploitation in the next 30 days.

The RESOLV::lookup iRule command in F5 BIG-IP LTM, APM, ASM, and Link Controller 10.2.1 through 10.2.4, 11.2.1, 11.4.x, 11.5.x before 11.5.4 HF2, 11.6.x before 11.6.1, and 12.0.0 before HF3; BIG-IP AAM, AFM, and PEM 11.4.x, 11.5.x before 11.5.4 HF2, 11.6.x before 11.6.1, and 12.0.0 before HF3; BIG-IP Analytics 11.2.1, 11.4.x, 11.5.x before 11.5.4 HF2, 11.6.x before 11.6.1, and 12.0.0 before HF3; BIG-IP DNS 12.0.0 before HF3; BIG-IP Edge Gateway, WebAccelerator, and WOM 10.2.1 through 10.2.4 and 11.2.1; BIG-IP GTM 10.2.1 through 10.2.4, 11.2.1, 11.4.x, 11.5.x before 11.5.4 HF2, and 11.6.x before 11.6.1; and BIG-IP PSM 10.2.1 through 10.2.4 and 11.4.0 through 11.4.1 allows remote DNS servers to cause a denial of service (CPU consumption or Traffic Management Microkernel crash) via a crafted PTR response.

Affected products

  • F5 BIG-IP Access Policy Manager: version 10.2.1 only; version 10.2.2 only; version 10.2.3 only; version 10.2.4 only; version 11.2.1 only; version 11.4.0 only; …
  • F5 BIG-IP Advanced Firewall Manager: version 11.4.0 only; version 11.4.1 only; version 11.5.0 only; version 11.5.1 only; version 11.5.2 only; version 11.5.3 only; …
  • F5 BIG-IP Analytics: version 11.2.1 only; version 11.4.0 only; version 11.4.1 only; version 11.5.0 only; version 11.5.1 only; version 11.5.2 only; …
  • F5 BIG-IP Application Acceleration Manager: version 11.4.0 only; version 11.4.1 only; version 11.5.0 only; version 11.5.1 only; version 11.5.2 only; version 11.5.3 only; …
  • F5 BIG-IP Application Security Manager: version 10.2.1 only; version 10.2.2 only; version 10.2.3 only; version 10.2.4 only; version 11.2.1 only; version 11.4.0 only; …
  • F5 BIG-IP Domain Name System: version 12.0.0 only
  • F5 BIG-IP Edge Gateway: version 10.2.1 only; version 10.2.2 only; version 10.2.3 only; version 10.2.4 only; version 11.2.1 only
  • F5 BIG-IP Global Traffic Manager: version 10.2.1 only; version 10.2.2 only; version 10.2.3 only; version 10.2.4 only; version 11.2.1 only; version 11.4.0 only; …
  • F5 BIG-IP Link Controller: version 10.2.1 only; version 10.2.2 only; version 10.2.3 only; version 10.2.4 only; version 11.2.1 only; version 11.4.0 only; …
  • F5 BIG-IP Local Traffic Manager: version 10.2.1 only; version 10.2.2 only; version 10.2.3 only; version 10.2.4 only; version 11.2.1 only; version 11.4.0 only; …
  • F5 BIG-IP Policy Enforcement Manager: version 11.4.0 only; version 11.4.1 only; version 11.5.0 only; version 11.5.1 only; version 11.5.2 only; version 11.5.3 only; …
  • F5 BIG-IP Protocol Security Module: version 10.2.1 only; version 10.2.2 only; version 10.2.3 only; version 10.2.4 only; version 11.4.0 only; version 11.4.1 only
  • F5 BIG-IP WAN Optimization Manager: version 10.2.1 only; version 10.2.2 only; version 10.2.3 only; version 10.2.4 only; version 11.2.1 only
  • F5 BIG-IP Webaccelerator: version 10.2.1 only; version 10.2.2 only; version 10.2.3 only; version 10.2.4 only; version 11.2.1 only

Published 2016-09-07. Last modified 2026-06-17.