CVE-2018-5518: F5 BIG-IP Access Policy Manager

Medium severity, CVSS 5.4. EPSS: 0.4% chance of exploitation in the next 30 days.

On F5 BIG-IP 13.0.0-13.1.0.5 or 12.0.0-12.1.3.3, malicious root users with access to a VCMP guest can cause a disruption of service on adjacent VCMP guests running on the same host. Exploiting this vulnerability causes the vCMPd process on the adjacent VCMP guest to restart and produce a core file. This issue is only exploitable on a VCMP guest which is operating in "host-only" or "bridged" mode. VCMP guests which are "isolated" are not impacted by this issue and do not provide mechanism to exploit the vulnerability. Guests which are deployed in "Appliance Mode" may be impacted however the exploit is not possible from an Appliance Mode guest. To exploit this vulnerability root access on a guest system deployed as "host-only" or "bridged" mode is required.

Affected products

  • F5 BIG-IP Access Policy Manager: from 12.0.0, up to and including 12.1.3; from 13.0.0, up to and including 13.1.0
  • F5 BIG-IP Advanced Firewall Manager: from 12.0.0, up to and including 12.1.3; from 13.0.0, up to and including 13.1.0
  • F5 BIG-IP Analytics: from 12.0.0, up to and including 12.1.3; from 13.0.0, up to and including 13.1.0
  • F5 BIG-IP Application Acceleration Manager: from 12.0.0, up to and including 12.1.3; from 13.0.0, up to and including 13.1.0
  • F5 BIG-IP Application Security Manager: from 12.0.0, up to and including 12.1.3; from 13.0.0, up to and including 13.1.0
  • F5 BIG-IP Domain Name System: from 12.0.0, up to and including 12.1.3; from 13.0.0, up to and including 13.1.0
  • F5 BIG-IP Edge Gateway: from 12.0.0, up to and including 12.1.3; from 13.0.0, up to and including 13.1.0
  • F5 BIG-IP Global Traffic Manager: from 12.0.0, up to and including 12.1.3; from 13.0.0, up to and including 13.1.0
  • F5 BIG-IP Link Controller: from 12.0.0, up to and including 12.1.3; from 13.0.0, up to and including 13.1.0
  • F5 BIG-IP Local Traffic Manager: from 12.0.0, up to and including 12.1.3; from 13.0.0, up to and including 13.1.0
  • F5 BIG-IP Policy Enforcement Manager: from 12.0.0, up to and including 12.1.3; from 13.0.0, up to and including 13.1.0
  • F5 BIG-IP Webaccelerator: from 12.0.0, up to and including 12.1.3; from 13.0.0, up to and including 13.1.0
  • F5 BIG-IP Websafe: from 12.0.0, up to and including 12.1.3; from 13.0.0, up to and including 13.1.0

Published 2018-05-02. Last modified 2026-06-17.