JPCERT-AT-2021-0017
JPCERT/CC
2021-04-14
Microsoft Corporation
April 2021 Security Updates
https://msrc.microsoft.com/update-guide/en-us/releaseNote/2021-Apr
Microsoft Corporation
Release Notes
https://msrc.microsoft.com/update-guide/releaseNote
According to Microsoft, the Win32k elevation of privilege vulnerability CVE-2021-28310 has been confirmed to be exploited in the wild. Please consider applying the security update programs as soon as possible.
Also, security updates for new vulnerabilities of Exchange Server have been released. Although Microsoft is not aware of any active exploits in the wild, it is recommended to install these updates immediately.
Microsoft The_Exchange_Team
Released: April 2021 Exchange Server Security Updates
https://techcommunity.microsoft.com/t5/exchange-team-blog/released-april-2021-exchange-server-security-updates/ba-p/2254617
Microsoft Update Catalog
https://www.catalog.update.microsoft.com/
Windows Update: FAQ
https://support.microsoft.com/en-us/help/12373/windows-update-faq
Microsoft Corporation
April 2021 Security Updates
https://msrc.microsoft.com/update-guide/en-us/releaseNote/2021-Apr
Microsoft Corporation
Win32k Elevation of Privilege Vulnerability
https://msrc.microsoft.com/update-guide/en-us/vulnerability/CVE-2021-28310
Microsoft Corporation
April 2021 Update Tuesday packages now available
https://msrc-blog.microsoft.com/2021/04/13/april-2021-update-tuesday-packages-now-available/
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/
JPCERT/CC
2021-04-14
I. Overview
Microsoft has released April 2021 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 2021 Security Updates
https://msrc.microsoft.com/update-guide/en-us/releaseNote/2021-Apr
Microsoft Corporation
Release Notes
https://msrc.microsoft.com/update-guide/releaseNote
According to Microsoft, the Win32k elevation of privilege vulnerability CVE-2021-28310 has been confirmed to be exploited in the wild. Please consider applying the security update programs as soon as possible.
Also, security updates for new vulnerabilities of Exchange Server have been released. Although Microsoft is not aware of any active exploits in the wild, it is recommended to install these updates immediately.
Microsoft The_Exchange_Team
Released: April 2021 Exchange Server Security Updates
https://techcommunity.microsoft.com/t5/exchange-team-blog/released-april-2021-exchange-server-security-updates/ba-p/2254617
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
April 2021 Security Updates
https://msrc.microsoft.com/update-guide/en-us/releaseNote/2021-Apr
Microsoft Corporation
Win32k Elevation of Privilege Vulnerability
https://msrc.microsoft.com/update-guide/en-us/vulnerability/CVE-2021-28310
Microsoft Corporation
April 2021 Update Tuesday packages now available
https://msrc-blog.microsoft.com/2021/04/13/april-2021-update-tuesday-packages-now-available/
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/