CVE-2020-5947: Medium severity f5 access policy manager vulnerability

Published Nov 19, 2020
·
Updated

In versions 16.0.0-16.0.0.1 and 15.1.0-15.1.1, on specific BIG-IP platforms, attackers may be able to obtain TCP sequence numbers from the BIG-IP system that can be reused in future connections with the same source and destination port and IP numbers. Only these platforms are affected: BIG-IP 2000 series (C112), BIG-IP 4000 series (C113), BIG-IP i2000 series (C117), BIG-IP i4000 series (C115), BIG-IP Virtual Edition (VE).

Affected Software

33 affected components
F5 BIG-IP Access Policy Manager>=15.0.0<15.1.2
F5 BIG-IP Access Policy Manager>=16.0.0<16.0.1
F5 BIG-IP Advanced Firewall Manager>=15.0.0<15.1.2
F5 BIG-IP Advanced Firewall Manager>=16.0.0<16.0.1
F5 Big-ip Advanced Web Application Firewall>=15.0.0<15.1.2
F5 Big-ip Advanced Web Application Firewall>=16.0.0<16.0.1
F5 BIG-IP Analytics>=15.0.0<15.1.2
F5 BIG-IP Analytics>=16.0.0<16.0.1
F5 Big-ip Application Acceleration Manager>=15.0.0<15.1.2
F5 Big-ip Application Acceleration Manager>=16.0.0<16.0.1
F5 BIG-IP Application Security Manager>=15.0.0<15.1.2
F5 BIG-IP Application Security Manager>=16.0.0<16.0.1
F5 Big-ip Ddos Hybrid Defender>=15.0.0<15.1.2
F5 Big-ip Ddos Hybrid Defender>=16.0.0<16.0.1
F5 Big-ip Domain Name System>=15.0.0<15.1.2
F5 Big-ip Domain Name System>=16.0.0<16.0.1
F5 Big-ip Fraud Protection Service>=15.0.0<15.1.2
F5 Big-ip Fraud Protection Service>=16.0.0<16.0.1
F5 Big-ip Global Traffic Manager>=15.0.0<=15.1.2
F5 Big-ip Global Traffic Manager>=16.0.0<16.0.1
F5 Big-ip Link Controller>=15.0.0<15.1.2
F5 Big-ip Link Controller>=16.0.0<16.0.1
F5 Big-ip Local Traffic Manager>=15.0.0<15.1.2
F5 Big-ip Local Traffic Manager>=16.0.0<16.0.1
F5 Big-ip Policy Enforcement Manager>=15.0.0<15.1.2
F5 Big-ip Policy Enforcement Manager>=16.0.0<16.0.1
F5 SSL Orchestrator>=15.0.0<15.1.2
F5 SSL Orchestrator>=16.0.0<16.0.1
F5 Big-ip Virtual Edition
F5 Big-ip 2000=c112
F5 Big-ip 4000=c113
F5 Big-ip I2000=c117
F5 Big-ip I4000=c115

Event History

Nov 19, 2020
CVE Published
via MITRE·12:14 AM
Data Sourced
via MITRE·12:14 AM
DescriptionWeakness

Frequently Asked Questions

1

What is the severity of CVE-2020-5947?

CVE-2020-5947 has a medium severity rating due to the potential for attackers to exploit TCP sequence numbers.

2

How do I fix CVE-2020-5947?

To fix CVE-2020-5947, upgrade to a version of F5 BIG-IP software higher than 16.0.1 or 15.1.2.

3

Which F5 BIG-IP platforms are affected by CVE-2020-5947?

CVE-2020-5947 affects specific BIG-IP platforms running versions 15.0.0 to 15.1.1 and 16.0.0 to 16.0.0.1.

4

What types of attacks are possible with CVE-2020-5947?

With CVE-2020-5947, attackers may be able to reuse valid TCP sequence numbers, potentially leading to session hijacking.

5

Is CVE-2020-5947 a remote vulnerability?

Yes, CVE-2020-5947 is a remote vulnerability, allowing attackers to exploit it without physical access to the affected systems.

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203