medium
5.9
Advisory Published
Updated

CVE-2018-15311

First published: Wed Oct 10 2018(Updated: )

When F5 BIG-IP 13.0.0-13.1.0.5, 12.1.0-12.1.3.5, 11.6.0-11.6.3.2, or 11.5.1-11.5.6 is processing specially crafted TCP traffic with the Large Receive Offload (LRO) feature enabled, TMM may crash, leading to a failover event. This vulnerability is not exposed unless LRO is enabled, so most affected customers will be on 13.1.x. LRO has been available since 11.4.0 but is not enabled by default until 13.1.0.

Credit: f5sirt@f5.com

Affected SoftwareAffected VersionHow to fix
Riverbed SteelApp Traffic Manager>=11.5.1<=11.5.6
Riverbed SteelApp Traffic Manager>=11.6.0.0<=11.6.3.2
Riverbed SteelApp Traffic Manager>=12.1.0.0<=12.1.3.5
Riverbed SteelApp Traffic Manager>=13.0.0.0<=13.1.0.5
F5 BIG-IP Application Acceleration Manager>=11.5.1<=11.5.6
F5 BIG-IP Application Acceleration Manager>=11.6.0.0<=11.6.3.2
F5 BIG-IP Application Acceleration Manager>=12.1.0.0<=12.1.3.5
F5 BIG-IP Application Acceleration Manager>=13.0.0.0<=13.1.0.5
F5 BIG-IP Advanced Firewall Manager>=11.5.1<=11.5.6
F5 BIG-IP Advanced Firewall Manager>=11.6.0.0<=11.6.3.2
F5 BIG-IP Advanced Firewall Manager>=12.1.0.0<=12.1.3.5
F5 BIG-IP Advanced Firewall Manager>=13.0.0.0<=13.1.0.5
F5 BIG-IP Analytics>=11.5.1<=11.5.6
F5 BIG-IP Analytics>=11.6.0.0<=11.6.3.2
F5 BIG-IP Analytics>=12.1.0.0<=12.1.3.5
F5 BIG-IP Analytics>=13.0.0.0<=13.1.0.5
F5 Access Policy Manager>=11.5.1<=11.5.6
F5 Access Policy Manager>=11.6.0.0<=11.6.3.2
F5 Access Policy Manager>=12.1.0.0<=12.1.3.5
F5 Access Policy Manager>=13.0.0.0<=13.1.0.5
F5 Application Security Manager>=11.5.1<=11.5.6
F5 Application Security Manager>=11.6.0.0<=11.6.3.2
F5 Application Security Manager>=12.1.0.0<=12.1.3.5
F5 Application Security Manager>=13.0.0.0<=13.1.0.5
F5 BIG-IP>=11.5.1<=11.5.6
F5 BIG-IP>=11.6.0.0<=11.6.3.2
F5 BIG-IP>=12.1.0.0<=12.1.3.5
F5 BIG-IP>=13.0.0.0<=13.1.0.5
F5 BIG-IP Edge Gateway>=11.5.1<=11.5.6
F5 BIG-IP Edge Gateway>=11.6.0.0<=11.6.3.2
F5 BIG-IP Edge Gateway>=12.1.0.0<=12.1.3.5
F5 BIG-IP Edge Gateway>=13.0.0.0<=13.1.0.5
F5 BIG-IP Fraud Protection Service>=11.5.1<=11.5.6
F5 BIG-IP Fraud Protection Service>=11.6.0.0<=11.6.3.2
F5 BIG-IP Fraud Protection Service>=12.1.0.0<=12.1.3.5
F5 BIG-IP Fraud Protection Service>=13.0.0.0<=13.1.0.5
Riverbed SteelApp Traffic Manager>=11.5.1<=11.5.6
Riverbed SteelApp Traffic Manager>=11.6.0.0<=11.6.3.2
Riverbed SteelApp Traffic Manager>=12.1.0.0<=12.1.3.5
Riverbed SteelApp Traffic Manager>=13.0.0.0<=13.1.0.5
F5 BIG-IP Link Controller>=11.5.1<=11.5.6
F5 BIG-IP Link Controller>=11.6.0.0<=11.6.3.2
F5 BIG-IP Link Controller>=12.1.0.0<=12.1.3.5
F5 BIG-IP Link Controller>=13.0.0.0<=13.1.0.5
F5 BIG-IP Policy Enforcement Manager>=11.5.1<=11.5.6
F5 BIG-IP Policy Enforcement Manager>=11.6.0.0<=11.6.3.2
F5 BIG-IP Policy Enforcement Manager>=12.1.0.0<=12.1.3.5
F5 BIG-IP Policy Enforcement Manager>=13.0.0.0<=13.1.0.5
F5 BIG-IP WebAccelerator>=11.5.1<=11.5.6
F5 BIG-IP WebAccelerator>=11.6.0.0<=11.6.3.2
F5 BIG-IP WebAccelerator>=12.1.0.0<=12.1.3.5
F5 BIG-IP WebAccelerator>=13.0.0.0<=13.1.0.5

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2018-15311?

    The severity of CVE-2018-15311 is high due to the potential for TMM crashes leading to service interruptions.

  • How do I fix CVE-2018-15311?

    To fix CVE-2018-15311, you should disable the Large Receive Offload (LRO) feature or apply the latest patches provided by F5.

  • What versions are affected by CVE-2018-15311?

    CVE-2018-15311 affects F5 BIG-IP versions 11.5.1 through 11.6.3.2, 12.1.0 through 12.1.3.5, and 13.0.0 through 13.1.0.5.

  • Is CVE-2018-15311 exposed to all users?

    CVE-2018-15311 is not exposed to all users, as it requires the LRO feature to be enabled to be vulnerable.

  • What systems are impacted by CVE-2018-15311?

    CVE-2018-15311 impacts systems running F5 BIG-IP Local Traffic Manager, Application Acceleration Manager, and other associated products if the specified versions are in use.

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