Microsoft Patch Tuesday – April 2023

Patch Tuesday is once again upon us. As always, our team has put together the monthly Patch Tuesday Report to help you manage your update progress. The audit report gives you a quick and clear overview of your Windows machines and their patching status. The April 2023 edition of Patch Tuesday brings us 97 fixes, with 7 rated as critical. We’ve listed the most important changes below.

⚡ TL;DR | Go Straight to the April 2023 Patch Tuesday Audit Report

Microsoft Message Queuing Remote Code Execution Vulnerability

The most critical vulnerability this month is CVE-2023-21554 with a CVSS base score of 9.8. While there isn’t much information available on how this vulnerability works exactly, an attacker would need to send a specially crafted malicious MSMQ packet to a MSMQ server which could result in remote code execution on the server side. Microsoft also lists that exploitation of this vulnerability is more than likely.

One big upside is that only devices that have the MSMQ Server feature installed are vulnerable, so not all of your devices are vulnerable by default. You can get an easy overview of which servers have the MSMQ Server feature installed using our MSMQ Server feature audit.

Layer 2 Tunneling Protocol Remote Code Execution

Two of the critical vulnerabilities are in the Layer 2 Tunneling protocol with both having a CVSS score of 8.1. To exploit this vulnerability, an unauthenticated attacker could send a specially crafted connection request to a RAS server, which could lead to remote code execution (RCE) on the RAS server machine.

CVE-2023-28219 and CVE-2023-28220 are more likely to be exploited, but again this only applies to servers with the Remote Access Server role. If you want to know which of your server have the Remote Access Server role installed, you can run our RAS audit.

DHCP Server Service Remote Code Execution Vulnerability

The last more than likely to be exploited vulnerability is a RCE vulnerability in the DHCP Server service. With a CVSS score of 8.8, CVE-2023-28231 sits in the middle of the previous vulnerabilities. In order to exploit this vulnerability an authenticated attacker could leverage a specially crafted RPC call to the DHCP service which then can lead to remote code execution.

While this vulnerability also only affects specific devices, namely ones with the DHCP Server Service, its more than likely that you have one of these so its important to make sure they are updated. You can get a quick overview of all your DHCP Servers using our DHCP Server Role audit.

Run the Patch Tuesday April 2023 Audit

To help manage your update progress, we’ve created the Patch Tuesday Audit that checks if the assets in your network are on the latest patch updates. The report has been color-coded to see which machines are up-to-date and which ones still need to be updated. As always, system administrators are urged to update their environment as soon as possible to ensure all endpoints are secured.

The Lansweeper Patch Tuesday report is automatically added to Lansweeper Cloud sites. Lansweeper Cloud is included in all our licenses without any additional cost and allows you to federate all your installations into one single view so all you need to do is look at one report, automatically added every patch Tuesday!

Patch Tuesday April 2023 CVE Codes & Titles

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