Vulnerability identifier: #VU48852

Vulnerability risk: Low

CVSSv3.1: 7.3 [CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-17142

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

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 in Microsoft Exchange. A remote administrator can pass specially crafted input to the application and execute arbitrary code on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Microsoft Exchange Server: 2013 Cumulative Update 23 15.00.1497.002, 2019 Cumulative Update 6 15.02.0659.004 - 2019 Cumulative Update 7 15.02.0721.002, 2016 Cumulative Update 17 15.01.2044.004 - 2016 Cumulative Update 18 15.01.2106.002

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External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17142

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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.