CVE-2016-7476 Denial of service in BIG-IP LTM, AAM, AFM, APM, ASM, GTM, Link Controller, PEM, PSM, WebSafe

High 7.5 Published 11 May 2017 Updated 6 Aug 2024

Remote attackers can cause a denial of service in F5 BIG-IP devices by sending crafted TCP packets that trigger a memory leak in the Traffic Management Microkernel.

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-2016-7476?

CVE-2016-7476 is a high-severity denial of service vulnerability in F5 Big-Ip Access Policy Manager, published on 11 May 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The Traffic Management Microkernel (TMM) in F5 BIG-IP LTM, AAM, AFM, APM, ASM, GTM, Link Controller, PEM, PSM, and WebSafe 11.6.0 before 11.6.0 HF6, 11.5.0 before 11.5.3 HF2, and 11.3.0 before 11.4.1 HF10 may suffer from a memory leak while handling certain types of TCP traffic. Remote attackers may cause a denial of service (DoS) by way of a crafted TCP packet.

Weakness: CWE-20

Which versions are affected by CVE-2016-7476?

It affects 10 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 Global Traffic Manager, F5 Big-Ip Link Controller and 4 more.

How do I fix CVE-2016-7476?

No fix has been published for CVE-2016-7476 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-2016-7476 being exploited?

There is no known exploitation of CVE-2016-7476 in the wild and no public exploit code.

All F5 Big-Ip Access Policy Manager vulnerabilities

Sources

Also known as GHSA-j6wf-w5r4-84pv.