medium
5.9
CWE
326
Advisory Published
Updated

CVE-2020-5917: Weak Encryption

First published: Wed Aug 26 2020(Updated: )

In BIG-IP versions 15.1.0-15.1.0.4, 15.0.0-15.0.1.3, 14.1.0-14.1.2.3, 13.1.0-13.1.3.4, 12.1.0-12.1.5.1, and 11.6.1-11.6.5.2 and BIG-IQ versions 5.2.0-7.0.0, the host OpenSSH servers utilize keys of less than 2048 bits which are no longer considered secure.

Credit: f5sirt@f5.com

Affected SoftwareAffected VersionHow to fix
F5 Access Policy Manager>=11.6.1<=11.6.5
F5 Access Policy Manager>=12.1.0<12.1.5.2
F5 Access Policy Manager>=13.1.0<=13.1.3
F5 Access Policy Manager>=14.1.0<14.1.2.4
F5 Access Policy Manager>=15.0.0<15.0.1.4
F5 Access Policy Manager>=15.1.0<15.1.0.5
F5 BIG-IP Advanced Firewall Manager>=11.6.1<=11.6.5
F5 BIG-IP Advanced Firewall Manager>=12.1.0<12.1.5.2
F5 BIG-IP Advanced Firewall Manager>=13.1.0<=13.1.3
F5 BIG-IP Advanced Firewall Manager>=14.1.0<14.1.2.4
F5 BIG-IP Advanced Firewall Manager>=15.0.0<15.0.1.4
F5 BIG-IP Advanced Firewall Manager>=15.1.0<15.1.0.5
F5 BIG-IP Analytics>=11.6.1<=11.6.5
F5 BIG-IP Analytics>=12.1.0<12.1.5.2
F5 BIG-IP Analytics>=13.1.0<=13.1.3
F5 BIG-IP Analytics>=14.1.0<14.1.2.4
F5 BIG-IP Analytics>=15.0.0<15.0.1.4
F5 BIG-IP Analytics>=15.1.0<15.1.0.5
F5 BIG-IP Application Acceleration Manager>=11.6.1<=11.6.5
F5 BIG-IP Application Acceleration Manager>=12.1.0<12.1.5.2
F5 BIG-IP Application Acceleration Manager>=13.1.0<=13.1.3
F5 BIG-IP Application Acceleration Manager>=14.1.0<14.1.2.4
F5 BIG-IP Application Acceleration Manager>=15.0.0<15.0.1.4
F5 BIG-IP Application Acceleration Manager>=15.1.0<15.1.0.5
F5 Application Security Manager>=11.6.1<=11.6.5
F5 Application Security Manager>=12.1.0<12.1.5.2
F5 Application Security Manager>=13.1.0<=13.1.3
F5 Application Security Manager>=14.1.0<14.1.2.4
F5 Application Security Manager>=15.0.0<15.0.1.4
F5 Application Security Manager>=15.1.0<15.1.0.5
F5 BIG-IP>=11.6.1<=11.6.5
F5 BIG-IP>=12.1.0<12.1.5.2
F5 BIG-IP>=13.1.0<=13.1.3
F5 BIG-IP>=14.1.0<14.1.2.4
F5 BIG-IP>=15.0.0<15.0.1.4
F5 BIG-IP>=15.1.0<15.1.0.5
F5 BIG-IP Fraud Protection Service>=11.6.1<=11.6.5
F5 BIG-IP Fraud Protection Service>=12.1.0<12.1.5.2
F5 BIG-IP Fraud Protection Service>=13.1.0<=13.1.3
F5 BIG-IP Fraud Protection Service>=14.1.0<14.1.2.4
F5 BIG-IP Fraud Protection Service>=15.0.0<15.0.1.4
F5 BIG-IP Fraud Protection Service>=15.1.0<15.1.0.5
Riverbed SteelApp Traffic Manager>=11.6.1<=11.6.5
Riverbed SteelApp Traffic Manager>=12.1.0<12.1.5.2
Riverbed SteelApp Traffic Manager>=13.1.0<=13.1.3
Riverbed SteelApp Traffic Manager>=14.1.0<14.1.2.4
Riverbed SteelApp Traffic Manager>=15.0.0<15.0.1.4
Riverbed SteelApp Traffic Manager>=15.1.0<15.1.0.5
F5 BIG-IP Link Controller>=11.6.1<=11.6.5
F5 BIG-IP Link Controller>=12.1.0<12.1.5.2
F5 BIG-IP Link Controller>=13.1.0<=13.1.3
F5 BIG-IP Link Controller>=14.1.0<14.1.2.4
F5 BIG-IP Link Controller>=15.0.0<15.0.1.4
F5 BIG-IP Link Controller>=15.1.0<15.1.0.5
Riverbed SteelApp Traffic Manager>=11.6.1<=11.6.5
Riverbed SteelApp Traffic Manager>=12.1.0<12.1.5.2
Riverbed SteelApp Traffic Manager>=13.1.0<=13.1.3
Riverbed SteelApp Traffic Manager>=14.1.0<14.1.2.4
Riverbed SteelApp Traffic Manager>=15.0.0<15.0.1.4
Riverbed SteelApp Traffic Manager>=15.1.0<15.1.0.5
F5 BIG-IP Policy Enforcement Manager>=11.6.1<=11.6.5
F5 BIG-IP Policy Enforcement Manager>=12.1.0<12.1.5.2
F5 BIG-IP Policy Enforcement Manager>=13.1.0<=13.1.3
F5 BIG-IP Policy Enforcement Manager>=14.1.0<14.1.2.4
F5 BIG-IP Policy Enforcement Manager>=15.0.0<15.0.1.4
F5 BIG-IP Policy Enforcement Manager>=15.1.0<15.1.0.5
F5 BIG-IP and BIG-IQ Centralized Management>=5.2.0<=5.4.0
F5 BIG-IP and BIG-IQ Centralized Management>=6.0.0<=6.1.0
F5 BIG-IP and BIG-IQ Centralized Management=7.0.0

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2020-5917?

    CVE-2020-5917 is rated as high severity due to the use of weak encryption keys in OpenSSH servers.

  • How do I fix CVE-2020-5917?

    To fix CVE-2020-5917, upgrade to a version of BIG-IP that utilizes keys of 2048 bits or more.

  • Which versions are affected by CVE-2020-5917?

    CVE-2020-5917 affects BIG-IP versions ranging from 11.6.1 to 15.1.0.4.

  • Can CVE-2020-5917 lead to unauthorized access?

    Yes, CVE-2020-5917 can potentially allow unauthorized access due to the use of insecure encryption keys.

  • Is there a workaround for CVE-2020-5917?

    The recommended workaround for CVE-2020-5917 is to reconfigure the OpenSSH settings to enforce stronger key lengths, although upgrading is ideal.

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