Multiple vulnerabilities in Microsoft Exchange Server

Published: 2023-06-13 | Updated: 2023-06-19

Risk	High
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2023-32031 CVE-2023-28310
CWE-ID	CWE-502 CWE-20
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Microsoft Exchange Server Server applications / Mail servers
Vendor	Microsoft

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Deserialization of Untrusted Data

EUVDB-ID: #VU77240

Risk: High

CVSSv3.1:

CVE-ID: CVE-2023-32031

CWE-ID:

Exploit availability:

Description

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

The vulnerability exists due to insecure input validation when processing serialized data within the Command class. A remote user can pass specially crafted data to the application and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

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

Fixed software versions

CPE2.3

cpe:2.3:a:microsoft:microsoft_exchange_server:2019 CU13 2023H1:15.02.1258.012:*:*:*:*:*:*

External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-32031
http://www.zerodayinitiative.com/advisories/ZDI-23-881/

Q & A

Can this vulnerability be exploited remotely?

How the attacker can exploit this vulnerability?

Is there known malware, which exploits this vulnerability?

2) Input validation error

EUVDB-ID: #VU77238

Risk: Medium