CVE-2018-15319 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 31 Oct 2018 Updated 5 Aug 2024

Malicious HTTP requests can crash the Traffic Management Microkernel, causing a denial of service on F5 BIG-IP devices with specific non-default configurations.

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-2018-15319?

CVE-2018-15319 is a high-severity denial of service vulnerability in F5 Big-Ip Access Policy Manager, published on 31 Oct 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

On BIG-IP 14.0.0-14.0.0.2, 13.0.0-13.1.1.1, or 12.1.0-12.1.3.6, malicious requests made to virtual servers with an HTTP profile can cause the TMM to restart. The issue is exposed with the non-default "normalize URI" configuration options used in iRules and/or BIG-IP LTM policies.

Weakness: CWE-20

Which versions are affected by CVE-2018-15319?

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 Domain Name System, F5 Big-Ip Edge Gateway and 7 more.

How do I fix CVE-2018-15319?

No fix has been published for CVE-2018-15319 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-2018-15319 being exploited?

There is no known exploitation of CVE-2018-15319 in the wild and no public exploit code.

All F5 Big-Ip Access Policy Manager vulnerabilities

Sources

Also known as GHSA-prgq-gfv9-v386.