high
7.5
Advisory Published
Updated

CVE-2020-5856

First published: Thu Feb 06 2020(Updated: )

On BIG-IP 15.0.0-15.0.1.1 and 14.1.0-14.1.2.2, while processing specifically crafted traffic using the default 'xnet' driver, Virtual Edition instances hosted in Amazon Web Services (AWS) may experience a TMM restart.

Credit: f5sirt@f5.com

Affected SoftwareAffected VersionHow to fix
F5 Access Policy Manager>=14.1.0<14.1.2.3
F5 Access Policy Manager>=15.0.0<15.1.0
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
F5 BIG-IP Analytics>=14.1.0<14.1.2.3
F5 BIG-IP Analytics>=15.0.0<15.1.0
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
F5 Application Security Manager>=14.1.0<14.1.2.3
F5 Application Security Manager>=15.0.0<15.1.0
F5 BIG-IP>=14.1.0<14.1.2.3
F5 BIG-IP>=15.0.0<15.1.0
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
Riverbed SteelApp Traffic Manager>=14.1.0<14.1.2.3
Riverbed SteelApp Traffic Manager>=15.0.0<15.1.0
F5 BIG-IP Link Controller>=14.1.0<14.1.2.3
F5 BIG-IP Link Controller>=15.0.0<15.1.0
Riverbed SteelApp Traffic Manager>=14.1.0<14.1.2.3
Riverbed SteelApp Traffic Manager>=15.0.0<15.1.0
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

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2020-5856?

    CVE-2020-5856 is classified as a critical vulnerability due to its potential to cause a TMM restart in affected F5 BIG-IP instances.

  • How do I fix CVE-2020-5856?

    To mitigate CVE-2020-5856, upgrade your F5 BIG-IP software to a version higher than 15.0.1.1 or 14.1.2.2.

  • What products are affected by CVE-2020-5856?

    CVE-2020-5856 affects various versions of F5 BIG-IP Access Policy Manager, Advanced Firewall Manager, Analytics, Application Security Manager and others between 14.1.0 and 15.0.1.

  • How does CVE-2020-5856 impact AWS environments?

    In AWS environments, CVE-2020-5856 can cause Virtual Edition instances to experience unexpected TMM restarts when processing malicious traffic.

  • What is TMM in the context of CVE-2020-5856?

    TMM stands for Traffic Management Microkernel, which is responsible for processing traffic in F5 BIG-IP devices and can be restarted due to this vulnerability.

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