JPCERT-AT-2021-0001
                                                             JPCERT/CC
                                                            2021-01-13

                 <<< JPCERT/CC Alert 2021-01-13 >>>

          Microsoft Releases January 2021 Security Updates

       https://www.jpcert.or.jp/english/at/2021/at210001.html


I. Overview
Microsoft has released January 2021 Security Updates. This contains
updates that are rated as "Critical". Remote attackers leveraging
these vulnerabilities may be able to execute arbitrary code.

Details on the vulnerabilities can be found at the following URL:

    January 2021 Security Updates
    https://portal.msrc.microsoft.com/en-us/security-guidance/releasenotedetail/2021-Jan

[Vulnerabilities addressed (Including Security Update Programs rated as "critical")]
* If the same vulnerability spans multiple KBs, listing up each

    CVE-2021-1643
    HEVC Video Extensions Remote Code Execution Vulnerability
    https://msrc.microsoft.com/update-guide/en-us/vulnerability/CVE-2021-1643
    - KB number is not assigned

    CVE-2021-1647
    Microsoft Defender Remote Code Execution Vulnerability
    https://msrc.microsoft.com/update-guide/en-us/vulnerability/CVE-2021-1647
    - KB number is not assigned

    CVE-2021-1658
    Remote Procedure Call Runtime Remote Code Execution Vulnerability
    https://msrc.microsoft.com/update-guide/en-us/vulnerability/CVE-2021-1658
    - KB4598229, KB4598230, KB4598231, KB4598242, KB4598243, KB4598245
      KB4598275, KB4598278, KB4598279, KB4598285, KB4598287, KB4598288
      KB4598289, KB4598297

    CVE-2021-1660
    Remote Procedure Call Runtime Remote Code Execution Vulnerability
    https://msrc.microsoft.com/update-guide/en-us/vulnerability/CVE-2021-1660
    - KB4598229, KB4598230, KB4598231, KB4598242, KB4598243, KB4598245
      KB4598275, KB4598278, KB4598279, KB4598285, KB4598287, KB4598288
      KB4598289, KB4598297

    CVE-2021-1665
    GDI+ Remote Code Execution Vulnerability
    https://msrc.microsoft.com/update-guide/en-us/vulnerability/CVE-2021-1665
    - KB4598229, KB4598230, KB4598231, KB4598242, KB4598243, KB4598245
      KB4598275, KB4598278, KB4598279, KB4598285, KB4598287, KB4598288
      KB4598289, KB4598297

    CVE-2021-1666
    Remote Procedure Call Runtime Remote Code Execution Vulnerability
    https://msrc.microsoft.com/update-guide/en-us/vulnerability/CVE-2021-1666
    - KB4598229, KB4598230, KB4598231, KB4598242, KB4598243, KB4598245
      KB4598275, KB4598278, KB4598279, KB4598285, KB4598287, KB4598288
      KB4598289, KB4598297

    CVE-2021-1667
    Remote Procedure Call Runtime Remote Code Execution Vulnerability
    https://msrc.microsoft.com/update-guide/en-us/vulnerability/CVE-2021-1667
    - KB4598229, KB4598230, KB4598231, KB4598242, KB4598243, KB4598245
      KB4598275, KB4598278, KB4598279, KB4598285, KB4598287, KB4598288
      KB4598289, KB4598297

    CVE-2021-1668
    Microsoft DTV-DVD Video Decoder Remote Code Execution Vulnerability
    https://msrc.microsoft.com/update-guide/en-us/vulnerability/CVE-2021-1668
    - KB4598229, KB4598230, KB4598231, KB4598242, KB4598243, KB4598245
      KB4598275, KB4598278, KB4598279, KB4598285, KB4598289, KB4598297

    CVE-2021-1673
    Remote Procedure Call Runtime Remote Code Execution Vulnerability
    https://msrc.microsoft.com/update-guide/en-us/vulnerability/CVE-2021-1673
    - KB4598229, KB4598230, KB4598231, KB4598242, KB4598243, KB4598245
      KB4598275, KB4598278, KB4598279, KB4598285, KB4598287, KB4598288
      KB4598289, KB4598297

    CVE-2021-1705
    Microsoft Edge (HTML-based) Memory Corruption Vulnerability
    https://msrc.microsoft.com/update-guide/en-us/vulnerability/CVE-2021-1705
    - KB4598229, KB4598230, KB4598231, KB4598242, KB4598243, KB4598245

According to Microsoft, attacks leveraging the vulnerability
CVE-2021-1647 (Critical) has been observed in the wild. Please apply
the security update programs as soon as possible.


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
    January 2021 Security Updates
    https://portal.msrc.microsoft.com/en-us/security-guidance/releasenotedetail/2021-Jan

    Microsoft Corporation
    Microsoft Security Updates for January 2021 (Monthly) (Japanese)
    https://msrc-blog.microsoft.com/2021/01/12/202101-security-updates/


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/