CVE-2021-23028
Last modified
CVE-2021-23028 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. On version 16.0.x before 16.0.1.2, 15.1.x before 15.1.3.1, 14.1.x before 14.1.4.2, and 13.1.x before 13.1.4, when JSON content profiles are configured for URLs as part of an F5 Advanced Web Application Firewall (WAF)/BIG-IP ASM security policy and applied to a virtual server, undisclosed requests may cause the BIG-IP ASM bd process to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.. EPSS estimates a 0.90% chance of exploitation in the next 30 days.
Description
On version 16.0.x before 16.0.1.2, 15.1.x before 15.1.3.1, 14.1.x before 14.1.4.2, and 13.1.x before 13.1.4, when JSON content profiles are configured for URLs as part of an F5 Advanced Web Application Firewall (WAF)/BIG-IP ASM security policy and applied to a virtual server, undisclosed requests may cause the BIG-IP ASM bd process to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| F5 | Big-Ip Advanced Web Application Firewall | >= 13.1.3.5, <= 13.1.3.6 |
| F5 | Big-Ip Advanced Web Application Firewall | >= 14.1.3.1, <= 14.1.4.1 |
| F5 | Big-Ip Advanced Web Application Firewall | >= 15.1.1, < 15.1.3.1 |
| F5 | Big-Ip Advanced Web Application Firewall | 16.0.1 |
| F5 | Big-Ip Application Security Manager | >= 13.1..3.5, <= 13.1.3.6 |
| F5 | Big-Ip Application Security Manager | >= 14.1.3.1, <= 14.1.4.1 |
| F5 | Big-Ip Application Security Manager | >= 15.1.0, < 15.1.3.1 |
| F5 | Big-Ip Application Security Manager | 16.0.1 |
References
- https://support.f5.com/csp/article/K00602225Mitigation, Vendor Advisory
- https://support.f5.com/csp/article/K00602225Mitigation, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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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.
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