#VU77306 Input validation error in MDaemon

Vulnerability identifier: #VU77306

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: N/A

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
MDaemon
Server applications / Mail servers

Vendor: Alt-N

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can pass specially crafted input to the server and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

MDaemon: 18.0.0 - 18.0.5, 18.5.0 - 18.5.7, 19.0.0 - 19.0.7, 19.5.0 - 19.5.8, 20.0.0 - 20.0.5, 21.0.0 - 21.0.4, 21.5.0 - 21.5.2, 22.0.0 - 22.0.3, 23.0.0

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External links
https://mdaemon.com/pages/downloads-critical-updates#MD041823

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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.