CVE-2017-6147 Denial of service in F5 BIG-IP

Medium 5.9 Published 18 Sep 2017 Updated 17 Sep 2024

Attackers can cause a service interruption in F5 BIG-IP devices by triggering a TMM restart when SSL Forward Proxy is 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-2017-6147?

CVE-2017-6147 is a medium-severity denial of service vulnerability in F5 Big-Ip Access Policy Manager, published on 18 Sep 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In F5 BIG-IP LTM, AAM, AFM, Analytics, APM, ASM, DNS, Link Controller, PEM, and WebSafe 12.1.2-HF1 and 13.0.0, an undisclosed type of responses may cause TMM to restart, causing an interruption of service when "SSL Forward Proxy" setting is enabled in both the Client and Server SSL profiles assigned to a BIG-IP Virtual Server.

Which versions are affected by CVE-2017-6147?

It affects 10 products.

Products include F5 Big-Ip Access Policy Manager, F5 Big-Ip Advanced Firewall Manager, F5 Big-Ip Analytics, F5 Big-Ip Application Acceleration Manager, F5 Big-Ip Application Security Manager, F5 Big-Ip Domain Name System and 4 more.

How do I fix CVE-2017-6147?

No fix has been published for CVE-2017-6147 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-2017-6147 being exploited?

There is no known exploitation of CVE-2017-6147 in the wild and no public exploit code.

All F5 Big-Ip Access Policy Manager vulnerabilities

Sources

Also known as GHSA-gp2j-jj5j-9v8x.