high
7.5
CWE
20
Advisory Published
Updated

CVE-2021-23039: Input Validation

First published: Tue Sep 14 2021(Updated: )

On version 16.0.x before 16.0.1.2, 15.1.x before 15.1.3, 14.1.x before 14.1.2.8, and all versions of 13.1.x and 12.1.x, when IPSec is configured on a BIG-IP system, undisclosed requests from an authorized remote (IPSec) peer, which already has a negotiated Security Association, can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Credit: f5sirt@f5.com

Affected SoftwareAffected VersionHow to fix
F5 Access Policy Manager>=12.1.0<=12.1.6
F5 Access Policy Manager>=13.1.0<=13.1.4
F5 Access Policy Manager>=14.1.0<14.1.2.8
F5 Access Policy Manager>=15.1.0<15.1.3
F5 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<14.1.2.8
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 Analytics>=12.1.0<=12.1.6
F5 BIG-IP Analytics>=13.1.0<=13.1.4
F5 BIG-IP Analytics>=14.1.0<14.1.2.8
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<14.1.2.8
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 Application Security Manager>=12.1.0<=12.1.6
F5 Application Security Manager>=13.1.0<=13.1.4
F5 Application Security Manager>=14.1.0<14.1.2.8
F5 Application Security Manager>=15.1.0<15.1.3
F5 Application Security Manager>=16.0.0<16.0.1.2
F5 BIG-IP>=12.1.0<=12.1.6
F5 BIG-IP>=13.1.0<=13.1.4
F5 BIG-IP>=14.1.0<14.1.2.8
F5 BIG-IP>=15.1.0<15.1.3
F5 BIG-IP>=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<14.1.2.8
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
Riverbed SteelApp Traffic Manager>=12.1.0<=12.1.6
Riverbed SteelApp Traffic Manager>=13.1.0<=13.1.4
Riverbed SteelApp Traffic Manager>=14.1.0<14.1.2.8
Riverbed SteelApp Traffic Manager>=15.1.0<15.1.3
Riverbed SteelApp 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<14.1.2.8
F5 BIG-IP Link Controller>=15.1.0<15.1.3
F5 BIG-IP Link Controller>=16.0.0<16.0.1.2
Riverbed SteelApp Traffic Manager>=12.1.0<=12.1.6
Riverbed SteelApp Traffic Manager>=13.1.0<=13.1.4
Riverbed SteelApp Traffic Manager>=14.1.0<14.1.2.8
Riverbed SteelApp Traffic Manager>=15.1.0<15.1.3
Riverbed SteelApp 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<14.1.2.8
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

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2021-23039?

    CVE-2021-23039 has a severity rating that indicates it poses a significant risk to affected systems due to potential exploitation.

  • How do I fix CVE-2021-23039?

    To fix CVE-2021-23039, upgrade your F5 BIG-IP systems to the latest versions that include the patch.

  • Which versions are affected by CVE-2021-23039?

    CVE-2021-23039 affects F5 BIG-IP Access Policy Manager, Advanced Firewall Manager, Analytics, Application Security Manager, and other products in specified versions before the respective patches.

  • What type of vulnerability is CVE-2021-23039?

    CVE-2021-23039 is classified as a vulnerability that allows unauthorized requests to potentially disrupt traffic flow on affected BIG-IP systems.

  • Can CVE-2021-23039 be exploited remotely?

    Yes, CVE-2021-23039 can be exploited remotely by an authorized peer with an existing Security Association, affecting the IPSec configuration.

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