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

                 <<< JPCERT/CC Alert 2024-04-10 >>>

           Microsoft Releases April 2024 Security Updates

       https://www.jpcert.or.jp/english/at/2024/at230007.html


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/