CVE-2024-21771 F5 AFM Signature Matching Vulnerability
Attackers can cause traffic disruption and TMM restarts in F5 BIG-IP AFM by triggering excessive signature matching time.
- 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-2024-21771?
CVE-2024-21771 is a high-severity denial of service vulnerability in F5 Big-Ip Advanced Firewall Manager, published on 14 Feb 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
For unspecified traffic patterns, BIG-IP AFM IPS engine may spend an excessive amount of time matching the traffic against signatures, resulting in Traffic Management Microkernel (TMM) restarting and traffic disruption. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated
Weakness: CWE-770
Which versions are affected by CVE-2024-21771?
It affects 1 product.
Products include F5 Big-Ip Advanced Firewall Manager.
How do I fix CVE-2024-21771?
No fix has been published for CVE-2024-21771 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-2024-21771 being exploited?
There is no known exploitation of CVE-2024-21771 in the wild and no public exploit code.
Other vulnerabilities in F5 Big-Ip Advanced Firewall Manager
Sources
Also known as GHSA-8gwr-pghr-44v9.