#VU80430 Improper Authentication in Serv-U FTP Server - CVE-2023-40060

Vulnerability identifier: #VU80430

Vulnerability risk: Low

CVSSv4.0: 0.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-40060

CWE-ID: CWE-287

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Serv-U FTP Server
Server applications / File servers (FTP/HTTP)

Vendor: SolarWinds

Description

The vulnerability allows a remote user to bypass MFA authentication.

The vulnerability exists due to an error in the authentication process. A remote user with administrative credentials can bypass multi-factor/two-factor authentication and gain unauthorized access to the application.

Note, the vulnerability exists due to incomplete patch for #VU79825 (CVE-2023-35179)

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Serv-U FTP Server: 15.4 HF1

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External links
https://www.solarwinds.com/trust-center/security-advisories/cve-2023-40060

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

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