CVE-2017-6155 Denial of service in BIG-IP (LTM, AAM, AFM, APM, ASM, Edge Gateway, Link Controller, PEM, PSM, WebAccelerator, WebSafe)

High 7.5 Published 13 Apr 2018 Updated 17 Sep 2024

Malformed SPDY or HTTP/2 requests can cause a denial of service in F5 BIG-IP TMM when specific profiles are enabled.

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-2017-6155?

CVE-2017-6155 is a high-severity denial of service vulnerability in F5 Big-Ip Access Policy Manager, published on 13 Apr 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

On F5 BIG-IP 13.0.0, 12.0.0-12.1.3.1, 11.6.0-11.6.2, 11.4.1-11.5.5, or 11.2.1, malformed SPDY or HTTP/2 requests may result in a disruption of service to TMM. Data plane is only exposed when a SPDY or HTTP/2 profile is attached to a virtual server. There is no control plane exposure.

Which versions are affected by CVE-2017-6155?

It affects 11 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 Edge Gateway, F5 Big-Ip Link Controller and 5 more.

How do I fix CVE-2017-6155?

No fix has been published for CVE-2017-6155 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-2017-6155 being exploited?

There is no known exploitation of CVE-2017-6155 in the wild and no public exploit code.

All F5 Big-Ip Access Policy Manager vulnerabilities

Sources

Also known as GHSA-86w5-hhgc-x3mg.