JPCERT-AT-2024-0008
JPCERT/CC
2024-04-10

I. Overview

Microsoft has released April 2024 Security Updates to address the vulnerabilities in their products. Remote attackers leveraging these vulnerabilities may be able to execute arbitrary code. It is recommended to check the information provided by Microsoft and apply the updates.

Microsoft Corporation
April 2024 Security Updates
https://msrc.microsoft.com/update-guide/en-us/releaseNote/2024-Apr

Microsoft Corporation
Microsoft Security Updates for April 2024 (Monthly) (Japanese)
https://msrc.microsoft.com/blog/2024/04/202404-security-update/

According to Microsoft, among the vulnerabilities, the following vulnerability has been confirmed to be exploited in the wild. Please consider applying the security update programs by referring to the information provided by Microsoft. Also, Sophos published a blog detailing how they had reported the issue to Microsoft.

CVE-2024-26234
Proxy Driver Spoofing Vulnerability
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-26234

Sophos
Smoke and (screen) mirrors: A strange signed backdoor
https://news.sophos.com/en-us/2024/04/09/smoke-and-screen-mirrors-a-strange-signed-backdoor/

II. Solution

Please apply the security update programs through Microsoft Update,Windows Update, etc. as soon as possible.

Microsoft Update Catalog
https://www.catalog.update.microsoft.com/

Windows Update: FAQ
https://support.microsoft.com/en-us/help/12373/windows-update-faq

III. References

Microsoft Corporation
Release Notes
https://msrc.microsoft.com/update-guide/


If you have any information regarding this alert, please contact JPCERT/CC.

JPCERT Coordination Center (Early Warning Group)
MAIL: ew-info@jpcert.or.jp
https://www.jpcert.or.jp/english/