Threat Response: Patches available for multiple critical vulnerabilities in Microsoft products
On Tuesday March 9th, Microsoft published a number of patches for multiple security flaws as part of “Patch Tuesday”. The patched vulnerabilities include critical security vulnerabilities in Microsoft Windows and Microsoft Exchange Server.
We recommend installing these patches as soon as possible.
On March 9th, Microsoft published security patches for a large number of vulnerabilities, five of which are marked as ‘critical’. The two most severe vulnerabilities are tracked under the following CVE-numbers:
- CVE-2022-24508 – Windows SMBv3 Client/Server Remote Code Execution Vulnerability (CVSS3.1: 8.8)
- CVE-2022-23277 – Microsoft Exchange Server Remote Code Execution Vulnerability (CVSS3.1: 8.8)
In total, Microsoft has patched 92 vulnerabilities with this update. This Threat Response will describe the most important vulnerabilities. Microsoft has published a complete overview of the patched vulnerabilities.
CVE-2022-24508 – Windows SMBv3 Client/Server Remote Code Execution Vulnerability
With this vulnerability in SMBv3, authenticated users are able to execute arbitrary code. Because both clients and servers are affected, a malicious user is able to use this vulnerability for lateral movement in the network.
CVE-2022-23277 – Microsoft Exchange Server Remote Code Execution Vulnerability
With this vulnerability, authenticated users are also able to execute arbitrary code. Using a network call to an Exchange server, an authenticated user is able to execute code with elevated privileges.
From the list of vulnerabilities, five are marked as critical. Arbitrary code execution has a large impact on the affected system, and, because malicious users are able to use this for lateral movement, we assess the impact as high. Microsoft has provided a detailed list of all the affected products[2,3].
There is currently no public exploit code available for the two mentioned vulnerabilities, but we expect these to be available soon. We assess the risk as high.
No further mitigations are available, aside from installing the patches. We recommend installing the security updates as soon as possible.
What should you do?
Install the latest updates.
What will Northwave do?
Northwave will monitor developments around these vulnerabilities. When possible, we will add detection rules around these vulnerabilities to the Northwave Detection Platform. We will reach out to you again if there are important updates, including if the threat posed by this activity increases. If you have any questions or require any additional information, please reach out to us by phone or email.
E-mail: [email protected] Do you have an incident right now? Call our CERT number: +31 (0)85 043 7909 Disclaimer applies, see below.
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