CVE-2020-5906
HIGHCVSS 8.1/10EPSS 1.19%
Last modified
CVE-2020-5906 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. In versions 13.1.0-13.1.3.3, 12.1.0-12.1.5.2, and 11.6.1-11.6.5.2, the BIG-IP system does not properly enforce the access controls for the scp.blacklist files. This allows Admin and Resource Admin users with Secure Copy (SCP) protocol access to read and overwrite blacklisted files via SCP.. EPSS estimates a 1.19% chance of exploitation in the next 30 days.
Description
In versions 13.1.0-13.1.3.3, 12.1.0-12.1.5.2, and 11.6.1-11.6.5.2, the BIG-IP system does not properly enforce the access controls for the scp.blacklist files. This allows Admin and Resource Admin users with Secure Copy (SCP) protocol access to read and overwrite blacklisted files via SCP.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| F5 | Big-Ip Access Policy Manager | >= 11.6.1, <= 11.6.5 |
| F5 | Big-Ip Access Policy Manager | >= 12.1.0, <= 12.1.5 |
| F5 | Big-Ip Access Policy Manager | >= 13.1.0, <= 13.1.3 |
| F5 | Big-Ip Advanced Firewall Manager | >= 11.6.1, <= 11.6.5 |
| F5 | Big-Ip Advanced Firewall Manager | >= 12.1.0, <= 12.1.5 |
| F5 | Big-Ip Advanced Firewall Manager | >= 13.1.0, <= 13.1.3 |
| F5 | Big-Ip Analytics | >= 11.6.1, <= 11.6.5 |
| F5 | Big-Ip Analytics | >= 12.1.0, <= 12.1.5 |
| F5 | Big-Ip Analytics | >= 13.1.0, <= 13.1.3 |
| F5 | Big-Ip Application Acceleration Manager | >= 11.6.1, <= 11.6.5 |
| F5 | Big-Ip Application Acceleration Manager | >= 12.1.0, <= 12.1.5 |
| F5 | Big-Ip Application Acceleration Manager | >= 13.1.0, <= 13.1.3 |
| F5 | Big-Ip Application Security Manager | >= 11.6.1, <= 11.6.5 |
| F5 | Big-Ip Application Security Manager | >= 12.1.0, <= 12.1.5 |
| F5 | Big-Ip Application Security Manager | >= 13.1.0, <= 13.1.3 |
| F5 | Big-Ip Domain Name System | >= 11.6.1, <= 11.6.5 |
| F5 | Big-Ip Domain Name System | >= 12.1.0, <= 12.1.5 |
| F5 | Big-Ip Domain Name System | >= 13.1.0, <= 13.1.3 |
| F5 | Big-Ip Fraud Protection Service | >= 11.6.1, <= 11.6.5 |
| F5 | Big-Ip Fraud Protection Service | >= 12.1.0, <= 12.1.5 |
| F5 | Big-Ip Fraud Protection Service | >= 13.1.0, <= 13.1.3 |
| F5 | Big-Ip Global Traffic Manager | >= 11.6.1, <= 11.6.5 |
| F5 | Big-Ip Global Traffic Manager | >= 12.1.0, <= 12.1.5 |
| F5 | Big-Ip Global Traffic Manager | >= 13.1.0, <= 13.1.3 |
| F5 | Big-Ip Link Controller | >= 11.6.1, <= 11.6.5 |
| F5 | Big-Ip Link Controller | >= 12.1.0, <= 12.1.5 |
| F5 | Big-Ip Link Controller | >= 13.1.0, <= 13.1.3 |
| F5 | Big-Ip Local Traffic Manager | >= 11.6.1, <= 11.6.5 |
| F5 | Big-Ip Local Traffic Manager | >= 12.1.0, <= 12.1.5 |
| F5 | Big-Ip Local Traffic Manager | >= 13.1.0, <= 13.1.3 |
| F5 | Big-Ip Policy Enforcement Manager | >= 11.6.1, <= 11.6.5 |
| F5 | Big-Ip Policy Enforcement Manager | >= 12.1.0, <= 12.1.5 |
| F5 | Big-Ip Policy Enforcement Manager | >= 13.1.0, <= 13.1.3 |
References
- https://support.f5.com/csp/article/K82518062Vendor Advisory
- https://www.kb.cert.org/vuls/id/290915Third Party Advisory, US Government Resource
- https://support.f5.com/csp/article/K82518062Vendor Advisory
- https://www.kb.cert.org/vuls/id/290915Third Party Advisory, US Government Resource
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-5906?
In versions 13.1.0-13.1.3.3, 12.1.0-12.1.5.2, and 11.6.1-11.6.5.2, the BIG-IP system does not properly enforce the access controls for the scp.blacklist files. This allows Admin and Resource Admin users with Secure Copy (SCP) protocol access to read and overwrite blacklisted files via SCP.
How severe is CVE-2020-5906?
CVE-2020-5906 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 1.19% probability of exploitation in the next 30 days.
How do I fix CVE-2020-5906?
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.
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- CVE-2020-5902In BIG-IP versions 15.0.0-15.1.0.3, 14.1.0-14.1.2.5, 13.1.0-…9.8
- CVE-2020-5903In BIG-IP versions 15.0.0-15.1.0.3, 14.1.0-14.1.2.5, 13.1.0-…6.1
- CVE-2020-5904In BIG-IP versions 15.0.0-15.1.0.3, 14.1.0-14.1.2.5, 13.1.0-…8.8
- CVE-2020-5905In version 11.6.1-11.6.5.2 of the BIG-IP system Configuratio…4.3
- CVE-2020-5907In BIG-IP versions 15.0.0-15.1.0.3, 14.1.0-14.1.2.3, 13.1.0-…7.2
- CVE-2020-5908In versions bundled with BIG-IP APM 12.1.0-12.1.5 and 11.6.1…5.5
- CVE-2020-5909In versions 3.0.0-3.5.0, 2.0.0-2.9.0, and 1.0.1, when users …5.4
- CVE-2020-5910In versions 3.0.0-3.5.0, 2.0.0-2.9.0, and 1.0.1, the Neural …7.5
- CVE-2020-5911In versions 3.0.0-3.5.0, 2.0.0-2.9.0, and 1.0.1, the NGINX C…7.3
- CVE-2020-5912In BIG-IP versions 15.1.0-15.1.0.4, 15.0.0-15.0.1.3, 14.1.0-…7.1
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