Remote code execution in Microsoft Exchange Server

1) OS Command Injection

EUVDB-ID: #VU81831

Risk: Medium

CVSSv3.1: 7 [CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-36778

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Exploit availability: No

Description

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

The vulnerability exists due to improper validation of cmdlet arguments. A remote authenticated user on the local network can pass specially crafted data to the server and execute arbitrary code via a PowerShell remoting session.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Microsoft Exchange Server: 2016 CU22 Nov22SU 15.01.2375.037 - 2019 RTM Mar21SU 15.02.0221.018

External links

http://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36778

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

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.