CVE-2020-5871
Last modified
CVE-2020-5871 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. On BIG-IP 14.1.0-14.1.2.3, undisclosed requests can lead to a denial of service (DoS) when sent to BIG-IP HTTP/2 virtual servers. The problem can occur when ciphers, which have been blacklisted by the HTTP/2 RFC, are used on backend servers. EPSS estimates a 1.04% chance of exploitation in the next 30 days.
Description
On BIG-IP 14.1.0-14.1.2.3, undisclosed requests can lead to a denial of service (DoS) when sent to BIG-IP HTTP/2 virtual servers. The problem can occur when ciphers, which have been blacklisted by the HTTP/2 RFC, are used on backend servers. This is a data-plane issue. There is no control-plane exposure.
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 | >= 14.1.0, <= 14.1.2.3 |
| F5 | Big-Ip Advanced Firewall Manager | >= 14.1.0, <= 14.1.2.3 |
| F5 | Big-Ip Analytics | >= 14.1.0, <= 14.1.2.3 |
| F5 | Big-Ip Application Acceleration Manager | >= 14.1.0, <= 14.1.2.3 |
| F5 | Big-Ip Application Security Manager | >= 14.1.0, <= 14.1.2.3 |
| F5 | Big-Ip Domain Name System | >= 14.1.0, <= 14.1.2.3 |
| F5 | Big-Ip Fraud Protection Service | >= 14.1.0, <= 14.1.2.3 |
| F5 | Big-Ip Global Traffic Manager | >= 14.1.0, <= 14.1.2.3 |
| F5 | Big-Ip Link Controller | >= 14.1.0, <= 14.1.2.3 |
| F5 | Big-Ip Local Traffic Manager | >= 14.1.0, <= 14.1.2.3 |
| F5 | Big-Ip Policy Enforcement Manager | >= 14.1.0, <= 14.1.2.3 |
References
- https://support.f5.com/csp/article/K43450419Vendor Advisory
- https://support.f5.com/csp/article/K43450419Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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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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