File attachment vulnerability in MDaemon

1) File attachment security issue

EUVDB-ID: #VU334

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass certain security restrictions.

The vulnerability exists due to unknown error, related to file attachments. A remote unauthenticated attacker can bypass certain security restrictions.

Maximum impact from this vulnerability is unknown, however vendor has rated this vulnerability as critical.

Mitigation

Install the latest version from vendor's website. This vulnerability was fixed in the following versions:
11.0.x - 11.0.5
12.0.x - 12.0.6
12.5.x - 12.5.9
13.0.x - 13.0.8
13.5.x - 13.5.5
13.6.x - 13.6.5
14.0.x - 14.0.5
14.5.x - 14.5.5
15.0.x - 15.0.4
15.5.x - 15.5.4
16.0.x - 16.0.4

Vulnerable software versions

MDaemon: 11.0.0 - 16.0.3

External links

http://www.altn.com/Support/SecurityUpdate/MD070716_MDaemon_EN/

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.