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Microsoft June 2021 Patch Tuesday fixes 6 exploited zero-days, 50 flaws
Today is Microsoft's June 2021 Patch Tuesday, and with it comes fixes for seven zero-day vulnerabilities and a total of 50 flaws, so Windows admins will be scrambling to get devices secured.
Microsoft has fixed 50 vulnerabilities with today's update, with five classified as Critical and forty-five as Important.
For information about the non-security Windows updates, you can read about today's Windows 10 KB5003637 & KB5003635 cumulative updates.
Seven zero-day vulnerabilities fixed
As part of today's Patch Tuesday, Microsoft has fixed seven zero-day vulnerabilities, with six of them known to be exploited in the past.
The six actively exploited zero-day vulnerabilities are:
- CVE-2021-31955 - Windows Kernel Information Disclosure Vulnerability
- CVE-2021-31956 - Windows NTFS Elevation of Privilege Vulnerability
- CVE-2021-33739 - Microsoft DWM Core Library Elevation of Privilege Vulnerability
- CVE-2021-33742 - Windows MSHTML Platform Remote Code Execution Vulnerability
- CVE-2021-31199 - Microsoft Enhanced Cryptographic Provider Elevation of Privilege Vulnerability
- CVE-2021-31201 - Microsoft Enhanced Cryptographic Provider Elevation of Privilege Vulnerability
In addition, the 'CVE-2021-31968 - Windows Remote Desktop Services Denial of Service Vulnerability' was publicly disclosed but not seen in attacks.
Kaspersky discovered two of the zero-day vulnerabilities, so we will likely see a report coming soon explaining how they were used.
Recent updates from other companies
Other vendors who released updates in June include:
- Adobe released security updates for ten products.
- Android's June security updates were released yesterday.
- Cisco released security updates for numerous products this month.
- SAP released its June 2021 security updates.
The June 2021 Patch Tuesday Security Updates
Below is the full list of resolved vulnerabilities and released advisories in the June 2021 Patch Tuesday updates. To access the full description of each vulnerability and the systems that it affects, you can view the full report here.
| Tag | CVE ID | CVE Title | Severity |
|---|---|---|---|
| .NET Core & Visual Studio | CVE-2021-31957 | .NET Core and Visual Studio Denial of Service Vulnerability | Important |
| 3D Viewer | CVE-2021-31942 | 3D Viewer Remote Code Execution Vulnerability | Important |
| 3D Viewer | CVE-2021-31943 | 3D Viewer Remote Code Execution Vulnerability | Important |
| 3D Viewer | CVE-2021-31944 | 3D Viewer Information Disclosure Vulnerability | Important |
| Microsoft DWM Core Library | CVE-2021-33739 | Microsoft DWM Core Library Elevation of Privilege Vulnerability | Important |
| Microsoft Edge (Chromium-based) | CVE-2021-33741 | Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability | Important |
| Microsoft Intune | CVE-2021-31980 | Microsoft Intune Management Extension Remote Code Execution Vulnerability | Important |
| Microsoft Office | CVE-2021-31940 | Microsoft Office Graphics Remote Code Execution Vulnerability | Important |
| Microsoft Office | CVE-2021-31941 | Microsoft Office Graphics Remote Code Execution Vulnerability | Important |
| Microsoft Office Excel | CVE-2021-31939 | Microsoft Excel Remote Code Execution Vulnerability | Important |
| Microsoft Office Outlook | CVE-2021-31949 | Microsoft Outlook Remote Code Execution Vulnerability | Important |
| Microsoft Office SharePoint | CVE-2021-31964 | Microsoft SharePoint Server Spoofing Vulnerability | Important |
| Microsoft Office SharePoint | CVE-2021-31963 | Microsoft SharePoint Server Remote Code Execution Vulnerability | Critical |
| Microsoft Office SharePoint | CVE-2021-31950 | Microsoft SharePoint Server Spoofing Vulnerability | Important |
| Microsoft Office SharePoint | CVE-2021-31948 | Microsoft SharePoint Server Spoofing Vulnerability | Important |
| Microsoft Office SharePoint | CVE-2021-31966 | Microsoft SharePoint Server Remote Code Execution Vulnerability | Important |
| Microsoft Office SharePoint | CVE-2021-31965 | Microsoft SharePoint Server Information Disclosure Vulnerability | Important |
| Microsoft Office SharePoint | CVE-2021-26420 | Microsoft SharePoint Server Remote Code Execution Vulnerability | Important |
| Microsoft Scripting Engine | CVE-2021-31959 | Scripting Engine Memory Corruption Vulnerability | Critical |
| Microsoft Windows Codecs Library | CVE-2021-31967 | VP9 Video Extensions Remote Code Execution Vulnerability | Critical |
| Paint 3D | CVE-2021-31946 | Paint 3D Remote Code Execution Vulnerability | Important |
| Paint 3D | CVE-2021-31983 | Paint 3D Remote Code Execution Vulnerability | Important |
| Paint 3D | CVE-2021-31945 | Paint 3D Remote Code Execution Vulnerability | Important |
| Role: Hyper-V | CVE-2021-31977 | Windows Hyper-V Denial of Service Vulnerability | Important |
| Visual Studio Code - Kubernetes Tools | CVE-2021-31938 | Microsoft VsCode Kubernetes Tools Extension Elevation of Privilege Vulnerability | Important |
| Windows Bind Filter Driver | CVE-2021-31960 | Windows Bind Filter Driver Information Disclosure Vulnerability | Important |
| Windows Common Log File System Driver | CVE-2021-31954 | Windows Common Log File System Driver Elevation of Privilege Vulnerability | Important |
| Windows Cryptographic Services | CVE-2021-31201 | Microsoft Enhanced Cryptographic Provider Elevation of Privilege Vulnerability | Important |
| Windows Cryptographic Services | CVE-2021-31199 | Microsoft Enhanced Cryptographic Provider Elevation of Privilege Vulnerability | Important |
| Windows DCOM Server | CVE-2021-26414 | Windows DCOM Server Security Feature Bypass | Important |
| Windows Defender | CVE-2021-31978 | Microsoft Defender Denial of Service Vulnerability | Important |
| Windows Defender | CVE-2021-31985 | Microsoft Defender Remote Code Execution Vulnerability | Critical |
| Windows Drivers | CVE-2021-31969 | Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability | Important |
| Windows Event Logging Service | CVE-2021-31972 | Event Tracing for Windows Information Disclosure Vulnerability | Important |
| Windows Filter Manager | CVE-2021-31953 | Windows Filter Manager Elevation of Privilege Vulnerability | Important |
| Windows HTML Platform | CVE-2021-31971 | Windows HTML Platform Security Feature Bypass Vulnerability | Important |
| Windows Installer | CVE-2021-31973 | Windows GPSVC Elevation of Privilege Vulnerability | Important |
| Windows Kerberos | CVE-2021-31962 | Kerberos AppContainer Security Feature Bypass Vulnerability | Important |
| Windows Kernel | CVE-2021-31951 | Windows Kernel Elevation of Privilege Vulnerability | Important |
| Windows Kernel | CVE-2021-31955 | Windows Kernel Information Disclosure Vulnerability | Important |
| Windows Kernel-Mode Drivers | CVE-2021-31952 | Windows Kernel-Mode Driver Elevation of Privilege Vulnerability | Important |
| Windows MSHTML Platform | CVE-2021-33742 | Windows MSHTML Platform Remote Code Execution Vulnerability | Critical |
| Windows Network File System | CVE-2021-31975 | Server for NFS Information Disclosure Vulnerability | Important |
| Windows Network File System | CVE-2021-31974 | Server for NFS Denial of Service Vulnerability | Important |
| Windows Network File System | CVE-2021-31976 | Server for NFS Information Disclosure Vulnerability | Important |
| Windows NTFS | CVE-2021-31956 | Windows NTFS Elevation of Privilege Vulnerability | Important |
| Windows NTLM | CVE-2021-31958 | Windows NTLM Elevation of Privilege Vulnerability | Important |
| Windows Print Spooler Components | CVE-2021-1675 | Windows Print Spooler Elevation of Privilege Vulnerability | Important |
| Windows Remote Desktop | CVE-2021-31968 | Windows Remote Desktop Services Denial of Service Vulnerability | Important |
| Windows TCP/IP | CVE-2021-31970 | Windows TCP/IP Driver Security Feature Bypass Vulnerability | Important |
Microsoft June 2021 Patch Tuesday fixes 6 exploited zero-days, 50 flaws
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