#VU34177 Improper Certificate Validation in NGINX Controller - CVE-2020-5909

Vulnerability identifier: #VU34177

Vulnerability risk: Medium

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-5909

CWE-ID: CWE-295

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
NGINX Controller
Server applications / Web servers

Vendor: F5 Networks

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

In versions 3.0.0-3.5.0, 2.0.0-2.9.0, and 1.0.1, when users run the command displayed in NGINX Controller user interface (UI) to fetch the agent installer, the server TLS certificate is not verified.

Mitigation
Install update from vendor's website.

Vulnerable software versions

NGINX Controller: 1.0.1 - 3.5.0

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External links
https://support.f5.com/csp/article/K31150658

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.