CVE-2024-21771: F5 AFM Signature Matching Vulnerability
First published: Wed Feb 14 2024(Updated: )
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
Credit: f5sirt@f5.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| F5 BIG-IP (AFM + IPS) | =17.1.0 | 17.1.1 |
| F5 BIG-IP (AFM + IPS) | >=16.1.0<=16.1.3 | 16.1.4 |
| F5 BIG-IP (AFM + IPS) | >=15.1.0<=15.1.8 | 15.1.9 |
| F5 BIG-IP Advanced Firewall Manager | >=15.1.0<15.1.9 | |
| F5 BIG-IP Advanced Firewall Manager | >=16.1.0<16.1.4 | |
| F5 BIG-IP Advanced Firewall Manager | =17.1.0 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2024-21771?
CVE-2024-21771 is classified as a high severity vulnerability due to the potential for traffic disruption.
How do I fix CVE-2024-21771?
To fix CVE-2024-21771, upgrade F5 BIG-IP (AFM + IPS) to a version that includes the remedy for this vulnerability.
Which versions are affected by CVE-2024-21771?
CVE-2024-21771 affects F5 BIG-IP (AFM + IPS) versions 15.1.0 through 15.1.8, 16.1.0 through 16.1.3, and 17.1.0.
What symptoms indicate CVE-2024-21771 is affecting my system?
Symptoms of CVE-2024-21771 may include excessive time matching traffic against signatures leading to Traffic Management Microkernel (TMM) restarts.
Is there a workaround for CVE-2024-21771?
No specific workaround for CVE-2024-21771 is provided, and upgrading to a patched version is recommended.
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- alias/CVE-2024-21771
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- canonical/f5 big-ip (afm + ips)
- version/f5 big-ip (afm + ips)/17.1.0
- version/f5 big-ip (afm + ips)/16.1.0
- version/f5 big-ip (afm + ips)/16.1.3
- version/f5 big-ip (afm + ips)/15.1.0
- version/f5 big-ip (afm + ips)/15.1.8
- canonical/f5 big-ip advanced firewall manager
- version/f5 big-ip advanced firewall manager/15.1.0
- version/f5 big-ip advanced firewall manager/16.1.0
- version/f5 big-ip advanced firewall manager/17.1.0