JPCERT-AT-2023-0002
                                                             JPCERT/CC
                                                            2023-01-11

                 <<< JPCERT/CC Alert 2023-01-11 >>>

         Microsoft Releases January 2023 Security Updates

       https://www.jpcert.or.jp/english/at/2023/at230002.html


I. Overview
Microsoft has released January 2023 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
    January 2023 Security Updates
    https://msrc.microsoft.com/update-guide/en-us/releaseNote/2023-Jan

    Microsoft Corporation
    Microsoft Security Updates for January 2023 (Monthly) (Japanese)
    https://msrc-blog.microsoft.com/2023/1/10/202301-security-update/

According to Microsoft, among these 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.

    CVE-2023-21674
    Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability
    https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2023-21674


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/releaseNote

    Microsoft Corporation
    Windows 8.1 support will end on January 10, 2023
    https://support.microsoft.com/en-us/windows/windows-8-1-support-will-end-on-january-10-2023-3cfd4cde-f611-496a-8057-923fba401e93


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/