F5 BIG-IP ASM WAF Policy & WebSocket Config Causes TMM Crash
CVE-2024-21849 Published on February 14, 2024
BIG-IP Websockets vulnerability
When an Advanced WAF/ASM security policy and a Websockets profile are configured on a virtual server, undisclosed traffic can cause the Traffic Management Microkernel (TMM) process to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Vulnerability Analysis
CVE-2024-21849 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
Return of Pointer Value Outside of Expected Range
A function can return a pointer to memory that is outside of the buffer that the pointer is expected to reference.
Products Associated with CVE-2024-21849
stack.watch emails you whenever new vulnerabilities are published in F5 Networks Big Ip Application Security Manager or F5 Networks Big Ip Advanced Web Application Firewall. Just hit a watch button to start following.
Affected Versions
F5 BIG-IP:- Version 17.1.0 and below * is unaffected.
- Version 16.1.0 and below 16.1.4 is affected.
- Version 15.1.0 and below * is unaffected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.