SB2023061355 - Multiple vulnerabilities in Microsoft Exchange Server

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Deserialization of Untrusted Data (CVE-ID: CVE-2023-32031)

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.

2) Input validation error (CVE-ID: CVE-2023-28310)

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

The vulnerability exists due to insufficient validation of user-supplied input. A remote authenticated user can pass specially crafted input to the server and execute arbitrary code via a PowerShell remoting session.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-32031
• https://www.zerodayinitiative.com/advisories/ZDI-23-881/
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-28310