CVE-2018-5513 Denial of service in BIG-IP (LTM, AAM, AFM, Analytics, APM, ASM, DNS, Edge Gateway, GTM, Link Controller, PEM, WebAccelerator, WebSafe)

High 7.5 Published 1 Jun 2018 Updated 16 Sep 2024

A malformed TLS handshake crashes the Traffic Management Microkernel, causing service disruption on F5 BIG-IP devices with Proxy SSL 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-2018-5513?

CVE-2018-5513 is a high-severity denial of service vulnerability in F5 Big-Ip Access Policy Manager, published on 1 Jun 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

On F5 BIG-IP 13.1.0-13.1.0.3, 13.0.0, 12.1.0-12.1.3.3, 11.6.1-11.6.3.1, 11.5.1-11.5.5, or 11.2.1, a malformed TLS handshake causes TMM to crash leading to a disruption of service. This issue is only exposed on the data plane when Proxy SSL configuration is enabled. The control plane is not impacted by this issue.

Weakness: CWE-20

Which versions are affected by CVE-2018-5513?

It affects 13 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 7 more.

How do I fix CVE-2018-5513?

No fix has been published for CVE-2018-5513 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-2018-5513 being exploited?

There is no known exploitation of CVE-2018-5513 in the wild and no public exploit code.

All F5 Big-Ip Access Policy Manager vulnerabilities

Sources

Also known as GHSA-qf47-p59r-xq6g.