CVE-2021-23003
HIGHCVSS 7.5/10EPSS 0.96%
Last modified
CVE-2021-23003 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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, the Traffic Management Microkernel (TMM) process may produce a core file when undisclosed MPTCP traffic passes through a standard virtual server. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.. EPSS estimates a 0.96% chance of exploitation in the next 30 days.
Description
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, the Traffic Management Microkernel (TMM) process may produce a core file when undisclosed MPTCP traffic passes through a standard virtual server. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| F5 | Big-Ip Access Policy Manager | >= 11.6.1, < 11.6.5.3 |
| F5 | Big-Ip Access Policy Manager | >= 12.1.0, < 12.1.5.3 |
| F5 | Big-Ip Access Policy Manager | >= 13.1.0, < 13.1.3.6 |
| F5 | Big-Ip Access Policy Manager | >= 14.1.0, < 14.1.4 |
| F5 | Big-Ip Access Policy Manager | >= 15.1.0, < 15.1.2.1 |
| F5 | Big-Ip 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 Web Application Firewall | >= 11.6.1, < 11.6.5.3 |
| F5 | Big-Ip Advanced Web Application Firewall | >= 12.1.0, < 12.1.5.3 |
| F5 | Big-Ip Advanced Web Application Firewall | >= 13.1.0, < 13.1.3.6 |
| F5 | Big-Ip Advanced Web Application Firewall | >= 14.1.0, < 14.1.4 |
| F5 | Big-Ip Advanced Web Application Firewall | >= 15.1.0, < 15.1.2.1 |
| F5 | Big-Ip Advanced Web Application Firewall | >= 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 | Big-Ip Application Security Manager | >= 11.6.1, < 11.6.5.3 |
| F5 | Big-Ip Application Security Manager | >= 12.1.0, < 12.1.5.3 |
| F5 | Big-Ip Application Security Manager | >= 13.1.0, < 13.1.3.6 |
| F5 | Big-Ip Application Security Manager | >= 14.1.0, < 14.1.4 |
| F5 | Big-Ip Application Security Manager | >= 15.1.0, < 15.1.2.1 |
| F5 | Big-Ip 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 Domain Name System | >= 11.6.1, < 11.6.5.3 |
| F5 | Big-Ip Domain Name System | >= 12.1.0, < 12.1.5.3 |
| F5 | Big-Ip Domain Name System | >= 13.1.0, < 13.1.3.6 |
| F5 | Big-Ip Domain Name System | >= 14.1.0, < 14.1.4 |
| F5 | Big-Ip Domain Name System | >= 15.1.0, < 15.1.2.1 |
| F5 | Big-Ip Domain Name System | >= 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 |
Showing 50 of 84 affected configurations. See NVD for the full list.
References
- https://support.f5.com/csp/article/K43470422Vendor Advisory
- https://support.f5.com/csp/article/K43470422Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-23003?
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, the Traffic Management Microkernel (TMM) process may produce a core file when undisclosed MPTCP traffic passes through a standard virtual server. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.
How severe is CVE-2021-23003?
CVE-2021-23003 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.96% probability of exploitation in the next 30 days.
How do I fix CVE-2021-23003?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-23003?
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Scan your code nowSource: NVD / NIST