CVE-2021-23011: High severity F5 BIG-IP Access Policy Manager vulnerability
Published May 10, 2021
·Updated
On versions 16.0.x before 16.0.1.1, 15.1.x before 15.1.3, 14.1.x before 14.1.4, 13.1.x before 13.1.4, 12.1.x before 12.1.6, and 11.6.x before 11.6.5.3, when the BIG-IP system is buffering packet fragments for reassembly, the Traffic Management Microkernel (TMM) may consume an excessive amount of resources, eventually leading to a restart and failover event. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Affected Software
84 affected components
F5 BIG-IP Access Policy Manager>=11.6.1<11.6.5.3
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<16.0.1.1
F5 BIG-IP Advanced Firewall Manager>=11.6.1<11.6.5.3
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<16.0.1.1
F5 Big-ip Advanced Web Application Firewall>=11.6.1<11.6.5.3
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<16.0.1.1
F5 BIG-IP Analytics>=11.6.1<11.6.5.3
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<16.0.1.1
F5 Big-ip Application Acceleration Manager>=11.6.1<11.6.5.3
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<16.0.1.1
F5 BIG-IP Application Security Manager>=11.6.1<11.6.5.3
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<16.0.1.1
F5 Big-ip Ddos Hybrid Defender>=11.6.1<11.6.5.3
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<16.0.1.1
F5 Big-ip Domain Name System>=11.6.1<11.6.5.3
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<16.0.1.1
F5 Big-ip Fraud Protection Service>=11.6.1<11.6.5.3
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<16.0.1.1
F5 Big-ip Global Traffic Manager>=11.6.1<11.6.5.3
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<16.0.1.1
F5 Big-ip Link Controller>=11.6.1<11.6.5.3
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<16.0.1.1
F5 Big-ip Local Traffic Manager>=11.6.1<11.6.5.3
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<16.0.1.1
F5 Big-ip Policy Enforcement Manager>=11.6.1<11.6.5.3
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<16.0.1.1
F5 BIG-IP SSL Orchestrator>=11.6.1<11.6.5.3
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<16.0.1.1
Event History
May 10, 2021
CVE Published
via MITRE·01:19 PM
Data Sourced
via MITRE·01:19 PM
DescriptionWeakness
Frequently Asked Questions
1
What is the severity of CVE-2021-23011?
CVE-2021-23011 is categorized as a medium severity vulnerability.
2
How do I fix CVE-2021-23011?
To fix CVE-2021-23011, upgrade your F5 BIG-IP software to the appropriate version that is not affected by this vulnerability.
3
What systems are affected by CVE-2021-23011?
CVE-2021-23011 affects F5 BIG-IP versions before 16.0.1.1, 15.1.3, 14.1.4, 13.1.4, 12.1.6, and 11.6.5.3.
4
What is the cause of CVE-2021-23011?
CVE-2021-23011 is caused by the Traffic Management Microkernel (TMM) consuming excessive resources when buffering packet fragments.
5
Is there a workaround for CVE-2021-23011?
While upgrading is the recommended solution, temporarily adjusting resource allocation may provide limited relief until a full upgrade can be performed.