high
7.5
Advisory Published
Updated

CVE-2021-23004

First published: Wed Mar 31 2021(Updated: )

On BIG-IP versions 16.0.x before 16.0.1.1, 15.1.x before 15.1.2, 14.1.x before 14.1.3.1, 13.1.x before 13.1.3.6, 12.1.x before 12.1.5.3, and 11.6.x before 11.6.5.3, Multipath TCP (MPTCP) forwarding flows may be created on standard virtual servers without MPTCP enabled in the applied TCP profile. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.

Credit: f5sirt@f5.com

Affected SoftwareAffected VersionHow to fix
F5 Access Policy Manager>=11.6.1<11.6.5.3
F5 Access Policy Manager>=12.1.0<12.1.5.3
F5 Access Policy Manager>=13.1.0<13.1.3.6
F5 Access Policy Manager>=14.1.0<14.1.4
F5 Access Policy Manager>=15.1.0<15.1.2.1
F5 Access Policy Manager>=16.0.0<16.0.1.1
F5 BIG-IP Advanced Firewall Manager>=11.6.1<11.6.5.3
F5 BIG-IP Advanced Firewall Manager>=12.1.0<12.1.5.3
F5 BIG-IP Advanced Firewall Manager>=13.1.0<13.1.3.6
F5 BIG-IP Advanced Firewall Manager>=14.1.0<14.1.4
F5 BIG-IP Advanced Firewall Manager>=15.1.0<15.1.2.1
F5 BIG-IP Advanced Firewall Manager>=16.0.0<16.0.1.1
F5 BIG-IP Advanced WAF/ASM>=11.6.1<11.6.5.3
F5 BIG-IP Advanced WAF/ASM>=12.1.0<12.1.5.3
F5 BIG-IP Advanced WAF/ASM>=13.1.0<13.1.3.6
F5 BIG-IP Advanced WAF/ASM>=14.1.0<14.1.4
F5 BIG-IP Advanced WAF/ASM>=15.1.0<15.1.2.1
F5 BIG-IP Advanced WAF/ASM>=16.0.0<16.0.1.1
F5 BIG-IP Analytics>=11.6.1<11.6.5.3
F5 BIG-IP Analytics>=12.1.0<12.1.5.3
F5 BIG-IP Analytics>=13.1.0<13.1.3.6
F5 BIG-IP Analytics>=14.1.0<14.1.4
F5 BIG-IP Analytics>=15.1.0<15.1.2.1
F5 BIG-IP Analytics>=16.0.0<16.0.1.1
F5 BIG-IP Application Acceleration Manager>=11.6.1<11.6.5.3
F5 BIG-IP Application Acceleration Manager>=12.1.0<12.1.5.3
F5 BIG-IP Application Acceleration Manager>=13.1.0<13.1.3.6
F5 BIG-IP Application Acceleration Manager>=14.1.0<14.1.4
F5 BIG-IP Application Acceleration Manager>=15.1.0<15.1.2.1
F5 BIG-IP Application Acceleration Manager>=16.0.0<16.0.1.1
F5 Application Security Manager>=11.6.1<11.6.5.3
F5 Application Security Manager>=12.1.0<12.1.5.3
F5 Application Security Manager>=13.1.0<13.1.3.6
F5 Application Security Manager>=14.1.0<14.1.4
F5 Application Security Manager>=15.1.0<15.1.2.1
F5 Application Security Manager>=16.0.0<16.0.1.1
F5 BIG-IP DDoS Hybrid Defender>=11.6.1<11.6.5.3
F5 BIG-IP DDoS Hybrid Defender>=12.1.0<12.1.5.3
F5 BIG-IP DDoS Hybrid Defender>=13.1.0<13.1.3.6
F5 BIG-IP DDoS Hybrid Defender>=14.1.0<14.1.4
F5 BIG-IP DDoS Hybrid Defender>=15.1.0<15.1.2.1
F5 BIG-IP DDoS Hybrid Defender>=16.0.0<16.0.1.1
F5 BIG-IP>=11.6.1<11.6.5.3
F5 BIG-IP>=12.1.0<12.1.5.3
F5 BIG-IP>=13.1.0<13.1.3.6
F5 BIG-IP>=14.1.0<14.1.4
F5 BIG-IP>=15.1.0<15.1.2.1
F5 BIG-IP>=16.0.0<16.0.1.1
F5 BIG-IP Fraud Protection Service>=11.6.1<11.6.5.3
F5 BIG-IP Fraud Protection Service>=12.1.0<12.1.5.3
F5 BIG-IP Fraud Protection Service>=13.1.0<13.1.3.6
F5 BIG-IP Fraud Protection Service>=14.1.0<14.1.4
F5 BIG-IP Fraud Protection Service>=15.1.0<15.1.2.1
F5 BIG-IP Fraud Protection Service>=16.0.0<16.0.1.1
Riverbed SteelApp Traffic Manager>=11.6.1<11.6.5.3
Riverbed SteelApp Traffic Manager>=12.1.0<12.1.5.3
Riverbed SteelApp Traffic Manager>=13.1.0<13.1.3.6
Riverbed SteelApp Traffic Manager>=14.1.0<14.1.4
Riverbed SteelApp Traffic Manager>=15.1.0<15.1.2.1
Riverbed SteelApp Traffic Manager>=16.0.0<16.0.1.1
F5 BIG-IP Link Controller>=11.6.1<11.6.5.3
F5 BIG-IP Link Controller>=12.1.0<12.1.5.3
F5 BIG-IP Link Controller>=13.1.0<13.1.3.6
F5 BIG-IP Link Controller>=14.1.0<14.1.4
F5 BIG-IP Link Controller>=15.1.0<15.1.2.1
F5 BIG-IP Link Controller>=16.0.0<16.0.1.1
Riverbed SteelApp Traffic Manager>=11.6.1<11.6.5.3
Riverbed SteelApp Traffic Manager>=12.1.0<12.1.5.3
Riverbed SteelApp Traffic Manager>=13.1.0<13.1.3.6
Riverbed SteelApp Traffic Manager>=14.1.0<14.1.4
Riverbed SteelApp Traffic Manager>=15.1.0<15.1.2.1
Riverbed SteelApp Traffic Manager>=16.0.0<16.0.1.1
F5 BIG-IP Policy Enforcement Manager>=11.6.1<11.6.5.3
F5 BIG-IP Policy Enforcement Manager>=12.1.0<12.1.5.3
F5 BIG-IP Policy Enforcement Manager>=13.1.0<13.1.3.6
F5 BIG-IP Policy Enforcement Manager>=14.1.0<14.1.4
F5 BIG-IP Policy Enforcement Manager>=15.1.0<15.1.2.1
F5 BIG-IP Policy Enforcement Manager>=16.0.0<16.0.1.1
F5 BIG-IP SSL Orchestrator>=11.6.1<11.6.5.3
F5 BIG-IP SSL Orchestrator>=12.1.0<12.1.5.3
F5 BIG-IP SSL Orchestrator>=13.1.0<13.1.3.6
F5 BIG-IP SSL Orchestrator>=14.1.0<14.1.4
F5 BIG-IP SSL Orchestrator>=15.1.0<15.1.2.1
F5 BIG-IP SSL Orchestrator>=16.0.0<16.0.1.1

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2021-23004?

    CVE-2021-23004 has a severity rating that indicates potential impact on the confidentiality, integrity, or availability of affected systems.

  • How do I fix CVE-2021-23004?

    To fix CVE-2021-23004, upgrade your BIG-IP version to 16.0.1.1, 15.1.2, 14.1.3.1, 13.1.3.6, 12.1.5.3, or 11.6.5.3 or later.

  • What is affected by CVE-2021-23004?

    CVE-2021-23004 affects multiple versions of F5 BIG-IP products including the Access Policy Manager, Advanced Firewall Manager, and others.

  • What could an attacker do with CVE-2021-23004?

    An attacker could exploit CVE-2021-23004 to create unintended Multipath TCP forwarding flows on virtual servers not configured for MPTCP.

  • Does CVE-2021-23004 require authentication to be exploited?

    Exploitation of CVE-2021-23004 can occur without authentication, increasing the potential risk to users.

Company

Resources

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.
© 2025 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203