CVE-2017-6141 Denial of service in F5 BIG-IP LTM, AAM, AFM, APM, ASM, Link Controller, PEM, WebSafe

Medium 5.9 Published 20 Oct 2017 Updated 16 Sep 2024

Attackers can cause a denial of service in F5 BIG-IP devices by sending crafted TLS handshake packets when the optional Session Ticket feature 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-2017-6141?

CVE-2017-6141 is a medium-severity denial of service vulnerability in F5 Big-Ip Access Policy Manager, published on 20 Oct 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, APM, ASM, Link Controller, PEM, and WebSafe 12.1.0 through 12.1.2, certain values in a TLS abbreviated handshake when using a client SSL profile with the Session Ticket option enabled may cause disruption of service to the Traffic Management Microkernel (TMM). The Session Ticket option is disabled by default.

Weakness: CWE-20

Which versions are affected by CVE-2017-6141?

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-2017-6141?

No fix has been published for CVE-2017-6141 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-2017-6141 being exploited?

There is no known exploitation of CVE-2017-6141 in the wild and no public exploit code.

All F5 Big-Ip Access Policy Manager vulnerabilities

Sources

Also known as GHSA-rrff-4pjq-q3cc.