CVE-2021-23042: High severity F5 BIG-IP Access Policy Manager vulnerability

Published Sep 14, 2021
·
Updated

On BIG-IP version 16.0.x before 16.0.1.2, 15.1.x before 15.1.3, 14.1.x before 14.1.4, 13.1.x before 13.1.4, and 12.1.x before 12.1.6, when an HTTP profile is configured on a virtual server, undisclosed requests can cause a significant increase in system resource utilization. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Affected Software

70 affected components
F5 BIG-IP Access Policy Manager>=12.1.0<12.1.6
F5 BIG-IP Access Policy Manager>=13.1.0<13.1.4
F5 BIG-IP Access Policy Manager>=14.1.0<14.1.4
F5 BIG-IP Access Policy Manager>=15.1.0<15.1.3
F5 BIG-IP Access Policy Manager>=16.0.0<16.0.1.2
F5 BIG-IP Advanced Firewall Manager>=12.1.0<12.1.6
F5 BIG-IP Advanced Firewall Manager>=13.1.0<13.1.4
F5 BIG-IP Advanced Firewall Manager>=14.1.0<14.1.4
F5 BIG-IP Advanced Firewall Manager>=15.1.0<15.1.3
F5 BIG-IP Advanced Firewall Manager>=16.0.0<16.0.1.2
F5 Big-ip Advanced Web Application Firewall>=12.1.0<12.1.6
F5 Big-ip Advanced Web Application Firewall>=13.1.0<13.1.4
F5 Big-ip Advanced Web Application Firewall>=14.1.0<14.1.4
F5 Big-ip Advanced Web Application Firewall>=15.1.0<15.1.3
F5 Big-ip Advanced Web Application Firewall>=16.0.0<16.0.1.2
F5 BIG-IP Analytics>=12.1.0<12.1.6
F5 BIG-IP Analytics>=13.1.0<13.1.4
F5 BIG-IP Analytics>=14.1.0<14.1.4
F5 BIG-IP Analytics>=15.1.0<15.1.3
F5 BIG-IP Analytics>=16.0.0<16.0.1.2
F5 Big-ip Application Acceleration Manager>=12.1.0<12.1.6
F5 Big-ip Application Acceleration Manager>=13.1.0<13.1.4
F5 Big-ip Application Acceleration Manager>=14.1.0<14.1.4
F5 Big-ip Application Acceleration Manager>=15.1.0<15.1.3
F5 Big-ip Application Acceleration Manager>=16.0.0<16.0.1.2
F5 BIG-IP Application Security Manager>=12.1.0<12.1.6
F5 BIG-IP Application Security Manager>=13.1.0<13.1.4
F5 BIG-IP Application Security Manager>=14.1.0<14.1.4
F5 BIG-IP Application Security Manager>=15.1.0<15.1.3
F5 BIG-IP Application Security Manager>=16.0.0<16.0.1.2
F5 Big-ip Ddos Hybrid Defender>=12.1.0<12.1.6
F5 Big-ip Ddos Hybrid Defender>=13.1.0<13.1.4
F5 Big-ip Ddos Hybrid Defender>=14.1.0<14.1.4
F5 Big-ip Ddos Hybrid Defender>=15.1.0<15.1.3
F5 Big-ip Ddos Hybrid Defender>=16.0.0<16.0.1.2
F5 Big-ip Domain Name System>=12.1.0<12.1.6
F5 Big-ip Domain Name System>=13.1.0<13.1.4
F5 Big-ip Domain Name System>=14.1.0<14.1.4
F5 Big-ip Domain Name System>=15.1.0<15.1.3
F5 Big-ip Domain Name System>=16.0.0<16.0.1.2
F5 Big-ip Fraud Protection Service>=12.1.0<12.1.6
F5 Big-ip Fraud Protection Service>=13.1.0<13.1.4
F5 Big-ip Fraud Protection Service>=14.1.0<14.1.4
F5 Big-ip Fraud Protection Service>=15.1.0<15.1.3
F5 Big-ip Fraud Protection Service>=16.0.0<16.0.1.2
F5 Big-ip Global Traffic Manager>=12.1.0<12.1.6
F5 Big-ip Global Traffic Manager>=13.1.0<13.1.4
F5 Big-ip Global Traffic Manager>=14.1.0<14.1.4
F5 Big-ip Global Traffic Manager>=15.1.0<15.1.3
F5 Big-ip Global Traffic Manager>=16.0.0<16.0.1.2
F5 Big-ip Link Controller>=12.1.0<12.1.6
F5 Big-ip Link Controller>=13.1.0<13.1.4
F5 Big-ip Link Controller>=14.1.0<14.1.4
F5 Big-ip Link Controller>=15.1.0<15.1.3
F5 Big-ip Link Controller>=16.0.0<16.0.1.2
F5 Big-ip Local Traffic Manager>=12.1.0<12.1.6
F5 Big-ip Local Traffic Manager>=13.1.0<13.1.4
F5 Big-ip Local Traffic Manager>=14.1.0<14.1.4
F5 Big-ip Local Traffic Manager>=15.1.0<15.1.3
F5 Big-ip Local Traffic Manager>=16.0.0<16.0.1.2
F5 Big-ip Policy Enforcement Manager>=12.1.0<12.1.6
F5 Big-ip Policy Enforcement Manager>=13.1.0<13.1.4
F5 Big-ip Policy Enforcement Manager>=14.1.0<14.1.4
F5 Big-ip Policy Enforcement Manager>=15.1.0<15.1.3
F5 Big-ip Policy Enforcement Manager>=16.0.0<16.0.1.2
F5 BIG-IP SSL Orchestrator>=12.1.0<12.1.6
F5 BIG-IP SSL Orchestrator>=13.1.0<13.1.4
F5 BIG-IP SSL Orchestrator>=14.1.0<14.1.4
F5 BIG-IP SSL Orchestrator>=15.1.0<15.1.3
F5 BIG-IP SSL Orchestrator>=16.0.0<16.0.1.2

Event History

Sep 14, 2021
CVE Published
via MITRE·02:56 PM
Data Sourced
via MITRE·02:56 PM
DescriptionWeakness

Frequently Asked Questions

1

What is the severity of CVE-2021-23042?

CVE-2021-23042 is classified as a high severity vulnerability due to the significant increase in system resource utilization it can cause.

2

How do I fix CVE-2021-23042?

To mitigate CVE-2021-23042, upgrade to the latest version of the affected F5 BIG-IP products where this vulnerability has been addressed.

3

Which versions of F5 BIG-IP are affected by CVE-2021-23042?

CVE-2021-23042 affects F5 BIG-IP versions before 16.0.1.2, 15.1.3, 14.1.4, 13.1.4, and 12.1.6.

4

What type of issue does CVE-2021-23042 represent?

CVE-2021-23042 represents a resource exhaustion issue that can result from specific HTTP profile configurations on virtual servers.

5

Is there a workaround for CVE-2021-23042?

While the best practice is to update to a patched version, temporary measures may include disabling or reconfiguring the HTTP profiles to minimize exposure.

Company

Resources

Contact

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