high
8.1
CWE
362 319
Advisory Published
Updated

CVE-2020-5876: Race Condition

First published: Thu Apr 30 2020(Updated: )

On BIG-IP 15.0.0-15.0.1.3, 14.1.0-14.1.2.3, 13.1.0-13.1.3.3, 12.1.0-12.1.5.1, and 11.6.1-11.6.5.1, a race condition exists where mcpd and other processes may make unencrypted connection attempts to a new configuration sync peer. The race condition can occur when changing the ConfigSync IP address of a peer, adding a new peer, or when the Traffic Management Microkernel (TMM) first starts up.

Credit: f5sirt@f5.com

Affected SoftwareAffected VersionHow to fix
F5 Access Policy Manager>=11.6.1<=11.6.5.1
F5 Access Policy Manager>=12.1.0<=12.1.5.1
F5 Access Policy Manager>=13.1.0<=13.1.3.3
F5 Access Policy Manager>=14.1.0<=14.1.2.3
F5 Access Policy Manager>=15.0.0<=15.1.0.3
F5 BIG-IP Advanced Firewall Manager>=11.6.1<=11.6.5.1
F5 BIG-IP Advanced Firewall Manager>=12.1.0<=12.1.5.1
F5 BIG-IP Advanced Firewall Manager>=13.1.0<=13.1.3.3
F5 BIG-IP Advanced Firewall Manager>=14.1.0<=14.1.2.3
F5 BIG-IP Advanced Firewall Manager>=15.0.0<=15.1.0.3
F5 BIG-IP Analytics>=11.6.1<=11.6.5.1
F5 BIG-IP Analytics>=12.1.0<=12.1.5.1
F5 BIG-IP Analytics>=13.1.0<=13.1.3.3
F5 BIG-IP Analytics>=14.1.0<=14.1.2.3
F5 BIG-IP Analytics>=15.0.0<=15.1.0.3
F5 BIG-IP Application Acceleration Manager>=11.6.1<=11.6.5.1
F5 BIG-IP Application Acceleration Manager>=12.1.0<=12.1.5.1
F5 BIG-IP Application Acceleration Manager>=13.1.0<=13.1.3.3
F5 BIG-IP Application Acceleration Manager>=14.1.0<=14.1.2.3
F5 BIG-IP Application Acceleration Manager>=15.0.0<=15.1.0.3
F5 Application Security Manager>=11.6.1<=11.6.5.1
F5 Application Security Manager>=12.1.0<=12.1.5.1
F5 Application Security Manager>=13.1.0<=13.1.3.3
F5 Application Security Manager>=14.1.0<=14.1.2.3
F5 Application Security Manager>=15.0.0<=15.1.0.3
F5 BIG-IP>=11.6.1<=11.6.5.1
F5 BIG-IP>=12.1.0<=12.1.5.1
F5 BIG-IP>=13.1.0<=13.1.3.3
F5 BIG-IP>=14.1.0<=14.1.2.3
F5 BIG-IP>=15.0.0<=15.1.0.3
F5 BIG-IP Fraud Protection Service>=11.6.1<=11.6.5.1
F5 BIG-IP Fraud Protection Service>=12.1.0<=12.1.5.1
F5 BIG-IP Fraud Protection Service>=13.1.0<=13.1.3.3
F5 BIG-IP Fraud Protection Service>=14.1.0<=14.1.2.3
F5 BIG-IP Fraud Protection Service>=15.0.0<=15.1.0.3
Riverbed SteelApp Traffic Manager>=11.6.1<=11.6.5.1
Riverbed SteelApp Traffic Manager>=12.1.0<=12.1.5.1
Riverbed SteelApp Traffic Manager>=13.1.0<=13.1.3.3
Riverbed SteelApp Traffic Manager>=14.1.0<=14.1.2.3
Riverbed SteelApp Traffic Manager>=15.0.0<=15.1.0.3
F5 BIG-IP Link Controller>=11.6.1<=11.6.5.1
F5 BIG-IP Link Controller>=12.1.0<=12.1.5.1
F5 BIG-IP Link Controller>=13.1.0<=13.1.3.3
F5 BIG-IP Link Controller>=14.1.0<=14.1.2.3
F5 BIG-IP Link Controller>=15.0.0<=15.1.0.3
Riverbed SteelApp Traffic Manager>=11.6.1<=11.6.5.1
Riverbed SteelApp Traffic Manager>=12.1.0<=12.1.5.1
Riverbed SteelApp Traffic Manager>=13.1.0<=13.1.3.3
Riverbed SteelApp Traffic Manager>=14.1.0<=14.1.2.3
Riverbed SteelApp Traffic Manager>=15.0.0<=15.1.0.3
F5 BIG-IP Policy Enforcement Manager>=11.6.1<=11.6.5.1
F5 BIG-IP Policy Enforcement Manager>=12.1.0<=12.1.5.1
F5 BIG-IP Policy Enforcement Manager>=13.1.0<=13.1.3.3
F5 BIG-IP Policy Enforcement Manager>=14.1.0<=14.1.2.3
F5 BIG-IP Policy Enforcement Manager>=15.0.0<=15.1.0.3

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2020-5876?

    The severity of CVE-2020-5876 is classified as high due to potential unauthorized access through unencrypted connections.

  • How do I fix CVE-2020-5876?

    To fix CVE-2020-5876, upgrade to the latest versions of affected F5 BIG-IP products that address the vulnerability.

  • Which versions of F5 BIG-IP are affected by CVE-2020-5876?

    CVE-2020-5876 affects F5 BIG-IP versions 11.6.1 to 11.6.5.1, 12.1.0 to 12.1.5.1, 13.1.0 to 13.1.3.3, 14.1.0 to 14.1.2.3, and 15.0.0 to 15.0.1.3.

  • What processes are involved in the CVE-2020-5876 vulnerability?

    The CVE-2020-5876 vulnerability involves a race condition between the mcpd process and other processes during configuration synchronization.

  • Can CVE-2020-5876 lead to data exposure?

    Yes, CVE-2020-5876 may lead to data exposure due to the possibility of unencrypted connections to sync peers.

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