KLA11553 Multiple vulnerabilities in Microsoft Exchange Server

Multiple vulnerabilities were found in Microsoft Exchange Server. Malicious users can exploit these vulnerabilities to cause denial of service, spoof user interface.

Below is a complete list of vulnerabilities:

1. A denial of service vulnerability in Microsoft Exchange can be exploited remotely via specially crafted email to cause denial of service;
2. A spoofing vulnerability in Microsoft Exchange can be exploited remotely via specially crafted email to spoof user interface.

Original advisories

CVE-2019-1233

CVE-2019-1266

Related products

Microsoft-Exchange-Server

CVE list

CVE-2019-1233 critical

CVE-2019-1266 warning

KB list

4515832

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

• DoS

Denial of service. Exploitation of vulnerabilities with this impact can lead to loss of system availability or critical functional fault.

• 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 2019 Cumulative Update 1Microsoft Exchange Server 2016 Cumulative Update 13Microsoft Exchange Server 2019 Cumulative Update 2Microsoft Exchange Server 2016 Cumulative Update 12