CVE-2017-6156: F5 BIG-IP Access Policy Manager

Medium severity, CVSS 6.4. EPSS: 0.9% chance of exploitation in the next 30 days.

When the F5 BIG-IP 12.1.0-12.1.1, 11.6.0-11.6.1, 11.5.1-11.5.5, or 11.2.1 system is configured with a wildcard IPSec tunnel endpoint, it may allow a remote attacker to disrupt or impersonate the tunnels that have completed phase 1 IPSec negotiations. The attacker must possess the necessary credentials to negotiate the phase 1 of the IPSec exchange to exploit this vulnerability; in many environment this limits the attack surface to other endpoints under the same administration.

Affected products

  • F5 BIG-IP Access Policy Manager: from 11.5.1, up to and including 11.5.5; from 12.1.0, up to and including 12.1.1; version 11.2.1 only; version 11.6.1 only
  • F5 BIG-IP Advanced Firewall Manager: from 11.5.1, up to and including 11.5.5; from 12.1.0, up to and including 12.1.1; version 11.2.1 only; version 11.6.1 only
  • F5 BIG-IP Analytics: from 11.5.1, up to and including 11.5.5; from 12.1.0, up to and including 12.1.1; version 11.2.1 only; version 11.6.1 only
  • F5 BIG-IP Application Acceleration Manager: from 11.5.1, up to and including 11.5.5; from 12.1.0, up to and including 12.1.1; version 11.2.1 only; version 11.6.1 only
  • F5 BIG-IP Application Security Manager: from 11.5.1, up to and including 11.5.5; from 12.1.0, up to and including 12.1.1; version 11.2.1 only; version 11.6.1 only
  • F5 BIG-IP Domain Name System: from 11.5.1, up to and including 11.5.5; from 12.1.0, up to and including 12.1.1; version 11.2.1 only; version 11.6.1 only
  • F5 BIG-IP Edge Gateway: from 11.5.1, up to and including 11.5.5; from 12.1.0, up to and including 12.1.1; version 11.2.1 only; version 11.6.1 only
  • F5 BIG-IP Global Traffic Manager: from 11.5.1, up to and including 11.5.5; from 12.1.0, up to and including 12.1.1; version 11.2.1 only; version 11.6.1 only
  • F5 BIG-IP Link Controller: from 11.5.1, up to and including 11.5.5; from 12.1.0, up to and including 12.1.1; version 11.2.1 only; version 11.6.1 only
  • F5 BIG-IP Local Traffic Manager: from 11.5.1, up to and including 11.5.5; from 12.1.0, up to and including 12.1.1; version 11.2.1 only; version 11.6.1 only
  • F5 BIG-IP Policy Enforcement Manager: from 11.5.1, up to and including 11.5.5; from 12.1.0, up to and including 12.1.1; version 11.2.1 only; version 11.6.1 only
  • F5 BIG-IP Webaccelerator: from 11.5.1, up to and including 11.5.5; from 12.1.0, up to and including 12.1.1; version 11.2.1 only; version 11.6.1 only
  • F5 BIG-IP Websafe: from 11.5.1, up to and including 11.5.5; from 12.1.0, up to and including 12.1.1; version 11.2.1 only; version 11.6.1 only

Published 2018-04-13. Last modified 2026-06-17.