KLA20155 Multiple vulnerabilities in Microsoft Server Software

Multiple vulnerabilities were found in Microsoft Server Software. Malicious users can exploit these vulnerabilities to spoof user interface, gain privileges, obtain sensitive information.

Below is a complete list of vulnerabilities:

1. A spoofing vulnerability in Microsoft Exchange Server can be exploited remotely to spoof user interface.
2. An elevation of privilege vulnerability in Microsoft Exchange Server can be exploited remotely to gain privileges.
3. An information disclosure vulnerability in Microsoft Exchange Server can be exploited remotely to obtain sensitive information.

Original advisories

CVE-2023-21762

CVE-2023-21763

CVE-2023-21761

CVE-2023-21764

CVE-2023-21745

Related products

Microsoft-Exchange-Server

CVE list

CVE-2023-21762 critical

CVE-2023-21763 critical

CVE-2023-21761 critical

CVE-2023-21764 critical

CVE-2023-21745 critical

KB list

5022188

5022143

5022193

Solution

Install necessary updates from the KB section, that are listed in your Windows Update (Windows Update usually can be accessed from the Control Panel)

Impacts

• OSI

Obtain sensitive information. Exploitation of vulnerabilities with this impact can lead to capturing by abuser information, critical for user or system.

• PE

Privilege escalation. Exploitation of vulnerabilities with this impact can lead to performing by abuser actions, which are normally disallowed for current role.

• SUI

Spoof user interface. Exploitation of vulnerabilities with this impact can lead to changes in user interface to beguile user into inaccurate behavior.

Affected Products

• Microsoft Exchange Server 2016 Cumulative Update 23Microsoft Exchange Server 2019 Cumulative Update 12Microsoft Exchange Server 2013 Cumulative Update 23Microsoft Exchange Server 2019 Cumulative Update 11