CVE-2018-5535 Denial of service in BIG-IP (LTM, AAM, AFM, Analytics, APM, ASM, DNS, Edge Gateway, FPS, GTM, Link Controller, PEM, WebAccelerator)

High 7.5 Published 19 Jul 2018 Updated 16 Sep 2024

Crafted HTTP responses processed by a Virtual Server with an enabled QoE Video profile can cause TMM to restart, resulting in a Denial of Service.

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-2018-5535?

CVE-2018-5535 is a high-severity denial of service vulnerability in F5 Big-Ip Access Policy Manager, published on 19 Jul 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

On F5 BIG-IP 14.0.0, 13.0.0-13.1.0, 12.1.0-12.1.3, or 11.5.1-11.6.3 specifically crafted HTTP responses, when processed by a Virtual Server with an associated QoE profile that has Video enabled, may cause TMM to incorrectly buffer response data causing the TMM to restart resulting in a Denial of Service.

Weakness: CWE-20

Which versions are affected by CVE-2018-5535?

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-2018-5535?

No fix has been published for CVE-2018-5535 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-2018-5535 being exploited?

There is no known exploitation of CVE-2018-5535 in the wild and no public exploit code.

All F5 Big-Ip Access Policy Manager vulnerabilities

Sources

Also known as GHSA-cjxr-pc5w-w8vm.