Vulnerability identifier: #VU48886

Vulnerability risk: High

CVSSv3.1: 8 [CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2020-17144

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Microsoft Exchange Server
Server applications / Mail servers

Vendor: Microsoft

Description

The vulnerability allows a remote user to execute arbitrary code on the system.

The vulnerability exists due to insufficient validation of user-supplied input when processing cmdlet argument. A remote privileged user can pass specially crafted input to the exchange server and  execute arbitrary code.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Microsoft Exchange Server: 2010

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External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17144
http://www.microsoft.com/en-us/security/blog/2023/03/24/guidance-for-investigating-attacks-using-cve-2023-23397/

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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?

Yes. This vulnerability is being exploited in the wild.