CVE-2016-9247 Denial of service in F5 BIG-IP LTM, AAM, AFM, Analytics, APM, ASM, DNS, Link Controller, PEM, WebSafe

Medium 5.9 Published 10 Jan 2017 Updated 6 Aug 2024

A specific packet sequence can cause the Traffic Management Microkernel to restart, leading to a denial of service on F5 BIG-IP systems.

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-2016-9247?

CVE-2016-9247 is a medium-severity denial of service vulnerability in F5 Big-Ip Access Policy Manager, published on 10 Jan 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Under certain conditions for BIG-IP systems using a virtual server with an associated FastL4 profile and TCP analytics profile, a specific sequence of packets may cause the Traffic Management Microkernel (TMM) to restart.

Weakness: CWE-20

Which versions are affected by CVE-2016-9247?

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-2016-9247?

No fix has been published for CVE-2016-9247 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-2016-9247 being exploited?

There is no known exploitation of CVE-2016-9247 in the wild and no public exploit code.

All F5 Big-Ip Access Policy Manager vulnerabilities

Sources

Also known as GHSA-9xc5-rhr8-8cxf.