CVE-2017-6159 Denial of service in BIG-IP LTM, AAM, AFM, Analytics, APM, ASM, DNS, GTM, Link Controller, PEM, Websafe

Medium 5.9 Published 27 Oct 2017 Updated 17 Sep 2024

An attacker can cause a denial of service by triggering a TMM restart when the MPTCP option is enabled on a virtual server.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2017-6159?

CVE-2017-6159 is a medium-severity denial of service vulnerability in F5 Big-Ip Access Policy Manager, published on 27 Oct 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

F5 BIG-IP LTM, AAM, AFM, Analytics, APM, ASM, DNS, GTM, Link Controller, PEM, Websafe software version 12.0.0 to 12.1.2, 11.6.0 to 11.6.1 are vulnerable to a denial of service attack when the MPTCP option is enabled on a virtual server. Data plane is vulnerable when using the MPTCP option of a TCP profile. There is no control plane exposure. An attacker may be able to disrupt services by causing TMM to restart hence temporarily failing to process traffic.

Which versions are affected by CVE-2017-6159?

It affects 8 products.

Products include F5 Big-Ip Access Policy Manager, F5 Big-Ip Advanced Firewall Manager, F5 Big-Ip Application Acceleration Manager, F5 Big-Ip Application Security Manager, F5 Big-Ip Link Controller, F5 Big-Ip Local Traffic Manager and 2 more.

How do I fix CVE-2017-6159?

No fix has been published for CVE-2017-6159 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2017-6159 being exploited?

There is no known exploitation of CVE-2017-6159 in the wild and no public exploit code.

All F5 Big-Ip Access Policy Manager vulnerabilities

Sources

Also known as GHSA-4pmg-6wm7-72gm.