#VU31790 Incorrect default permissions in F5 Networks products - CVE-2020-5906

Vulnerability identifier: #VU31790

Vulnerability risk: Medium

CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

CVE-ID: CVE-2020-5906

CWE-ID: CWE-276

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerable software:
BIG-IP
BIG-IP LTM
BIG-IP AFM
BIG-IP Analytics
BIG-IP APM
BIG-IP ASM
BIG-IP FPS
BIG-IP GTM
BIG-IP PEM
BIG-IP AAM
BIG-IP DNS
BIG-IP Link Controller

Software vendor:
F5 Networks

The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists due to incorrect default permissions for the "scp.blacklist" files. A remote user can read and overwrite blacklisted files via SCP.

Install updates from vendor's website.

• https://support.f5.com/csp/article/K82518062
• https://www.kb.cert.org/vuls/id/290915