CVE-2024-21849 BIG-IP Websockets vulnerability
Attackers can crash the TMM process on BIG-IP devices with specific WAF and Websockets configurations, causing service disruption.
- 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-2024-21849?
CVE-2024-21849 is a high-severity denial of service vulnerability in F5 Big-Ip Advanced Web Application Firewall, published on 14 Feb 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-466
Which versions are affected by CVE-2024-21849?
It affects 2 products.
Products include F5 Big-Ip Advanced Web Application Firewall, F5 Big-Ip Application Security Manager.
How do I fix CVE-2024-21849?
No fix has been published for CVE-2024-21849 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-2024-21849 being exploited?
There is no known exploitation of CVE-2024-21849 in the wild and no public exploit code.
Other vulnerabilities in F5 Big-Ip Advanced Web Application Firewall
- CVE-2021-23031 Privilege escalation in BIG-IP Advanced WAF and BIG-IP ASM
- CVE-2021-23029 Server-side request forgery in BIG-IP Advanced WAF and BIG-IP ASM
- CVE-2021-23014 Missing authorization in BIG-IP ASM/Advanced WAF
- CVE-2021-22993 Cross-site scripting in BIG-IP Advanced WAF and BIG-IP ASM
- CVE-2026-40060 BIG-IP Advanced WAF and ASM vulnerability
All F5 Big-Ip Advanced Web Application Firewall vulnerabilities
Sources
Also known as GHSA-wjw6-7qc3-vghj.