Multiple F5 BIG-IP Products TMM HTTP Request Denial of Service Vulnerability [CVE-2017-6133]

A vulnerability in the Traffic Management Microkernel (TMM) URI parser library of multiple F5 BIG-IP products could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on a targeted system.

The vulnerability is due to improper processing of HTTP requests by an affected system. An attacker could exploit this vulnerability by sending a crafted HTTP request to the targeted system. An exploit could cause the TMM component of the system to generate a core file and restart, resulting in a DoS condition.

F5 has confirmed the vulnerability and released software updates.

CVE Number


To exploit this vulnerability, an attacker must send a crafted HTTP request to the targeted system, making exploitation more difficult in environments that restrict network access from untrusted sources.
Administrators are advised to apply the appropriate updates.

Administrators are advised to allow only trusted users to have network access.

Administrators can help protect affected systems from external attacks by using a solid firewall strategy.

Administrators are advised to monitor affected systems.

Vendor Announcements
F5 has released a security advisory and details of the patches at the following link: K25033460
Fixed Software
F5 has released software updates for this vulnerability. Customers are advised to follow the “Security Advisory Recommended Actions” section in the security advisory listed in the “Vendor Announcements” section of this alert.


Duncan Newell

Duncan is a technology professional with over 20 years experience of working in various IT roles. He has a interest in cyber security, and has a wide range of other skills in radio, electronics and telecommunications.

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