#VU77301 Arbitrary file upload in MDaemon - CVE-2021-27183

Vulnerability identifier: #VU77301

Vulnerability risk: Low

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-27183

CWE-ID: CWE-434

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
MDaemon
Server applications / Mail servers

Vendor: Alt-N

Description

The vulnerability allows a remote user to compromise vulnerable system.

The vulnerability exists due to insufficient validation of file during file upload. A remote administrator can upload a malicious file to any location on the server and execute it.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

MDaemon: 20.0.0 - 20.0.3

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External links
https://github.com/chudyPB/MDaemon-Advisories
https://www.altn.com/Support/SecurityUpdate/MD011221_MDaemon_EN/

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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.