Microsoft released the February 2021 Patch Tuesday yesterday , which fixes 56 vulnerabilities, of which 11 have been rated "critical", 43 as "serious" and 2 as "moderate".
Among the vulnerabilities fixed with Microsoft Patch Tuesday is a zero-day bug, as well as six vulnerabilities that were disclosed a short time ago.
The zero-day vulnerability, which was already being exploited by cybercriminals , is known as “CVE-2021-1732 – Windows Win32k Elevation of Privilege Vulnerability” and allows an attacker or malicious program to gain administrator privileges on the vulnerable device. The zero-day was discovered by researchers at DBAPPSecurity Co., Ltd.
Other vulnerabilities that were previously disclosed and fixed with Microsoft's February Patch Tuesday include:
- CVE-2021-1721 -. NET Core and Visual Studio Denial of Service
- CVE-2021-1727 – Windows Installer Elevation of Privilege
- CVE-2021-1733 – Sysinternals PsExec Elevation of Privilege
- CVE-2021-24098 – Windows Console Driver Denial of Service
- CVE-2021-24106 – Windows DirectX Information Disclosure
- CVE-2021-26701 – .NET Core Remote Code Execution
Additionally, Microsoft has fixed the CVE-2021-24105 vulnerability in the Azure Artifactory product that was discovered when researchers used it in a PoC attack against Microsoft systems.
Thanks to this vulnerability, attackers can create malicious public packages, which have the same name as internal packages used by internal corporate applications. When creating applications , the malicious packages will be used instead of the internal ones, allowing a supply chain attack.
This attack affected many companies: Microsoft, Apple, PayPal, Shopify, Netflix, Tesla, Yelp, and Uber.
Microsoft Patch Tuesday February 2021: All the fixes
In the table below, you can see all the vulnerabilities fixed with Microsoft's February Patch Tuesday:
| .NET Core | CVE-2021-26701 | .NET Core Remote Code Execution Vulnerability | Critical |
| .NET Core | CVE-2021-24112 | .NET Core Remote Code Execution Vulnerability | Critical |
| .NET Core & Visual Studio | CVE-2021-1721 | .NET Core and Visual Studio Denial of Service Vulnerability | Important |
| .NET Framework | CVE-2021-24111 | .NET Framework Denial of Service Vulnerability | Important |
| Azure IoT | CVE-2021-24087 | Azure IoT CLI extension Elevation of Privilege Vulnerability | Important |
| Developer Tools | CVE-2021-24105 | Package Managers Configurations Remote Code Execution Vulnerability | Important |
| Microsoft Azure Kubernetes Service | CVE-2021-24109 | Microsoft Azure Kubernetes Service Elevation of Privilege Vulnerability | Moderate |
| Microsoft Dynamics | CVE-2021-24101 | Microsoft Dataverse Information Disclosure Vulnerability | Important |
| Microsoft Dynamics | CVE-2021-1724 | Microsoft Dynamics Business Central Cross-site Scripting Vulnerability | Important |
| Microsoft Edge for Android | CVE-2021-24100 | Microsoft Edge for Android Information Disclosure Vulnerability | Important |
| Microsoft Exchange Server | CVE-2021-24085 | Microsoft Exchange Server Spoofing Vulnerability | Important |
| Microsoft Exchange Server | CVE-2021-1730 | Microsoft Exchange Server Spoofing Vulnerability | Important |
| Microsoft Graphics Component | CVE-2021-24093 | Windows Graphics Component Remote Code Execution Vulnerability | Critical |
| Microsoft Office Excel | CVE-2021-24067 | Microsoft Excel Remote Code Execution Vulnerability | Important |
| Microsoft Office Excel | CVE-2021-24068 | Microsoft Excel Remote Code Execution Vulnerability | Important |
| Microsoft Office Excel | CVE-2021-24069 | Microsoft Excel Remote Code Execution Vulnerability | Important |
| Microsoft Office Excel | CVE-2021-24070 | Microsoft Excel Remote Code Execution Vulnerability | Important |
| Microsoft Office SharePoint | CVE-2021-24071 | Microsoft SharePoint Information Disclosure Vulnerability | Important |
| Microsoft Office SharePoint | CVE-2021-1726 | Microsoft SharePoint Spoofing Vulnerability | Important |
| Microsoft Office SharePoint | CVE-2021-24066 | Microsoft SharePoint Remote Code Execution Vulnerability | Important |
| Microsoft Office SharePoint | CVE-2021-24072 | Microsoft SharePoint Server Remote Code Execution Vulnerability | Important |
| Microsoft Teams | CVE-2021-24114 | Microsoft Teams iOS Information Disclosure Vulnerability | Important |
| Microsoft Windows Codecs Library | CVE-2021-24081 | Microsoft Windows Codecs Library Remote Code Execution Vulnerability | Critical |
| Microsoft Windows Codecs Library | CVE-2021-24091 | Windows Camera Codec Pack Remote Code Execution Vulnerability | Critical |
| Role: DNS Server | CVE-2021-24078 | Windows DNS Server Remote Code Execution Vulnerability | Critical |
| Role: Hyper-V | CVE-2021-24076 | Microsoft Windows VMSwitch Information Disclosure Vulnerability | Important |
| Role: Windows Fax Service | CVE-2021-24077 | Windows Fax Service Remote Code Execution Vulnerability | Critical |
| Role: Windows Fax Service | CVE-2021-1722 | Windows Fax Service Remote Code Execution Vulnerability | Critical |
| Skype for Business | CVE-2021-24073 | Skype for Business and Lync Spoofing Vulnerability | Important |
| Skype for Business | CVE-2021-24099 | Skype for Business and Lync Denial of Service Vulnerability | Important |
| SysInternals | CVE-2021-1733 | Sysinternals PsExec Elevation of Privilege Vulnerability | Important |
| System Center | CVE-2021-1728 | System Center Operations Manager Elevation of Privilege Vulnerability | Important |
| Visual Studio | CVE-2021-1639 | Visual Studio Code Remote Code Execution Vulnerability | Important |
| Visual Studio Code | CVE-2021-26700 | Visual Studio Code npm-script Extension Remote Code Execution Vulnerability | Important |
| Windows Address Book | CVE-2021-24083 | Windows Address Book Remote Code Execution Vulnerability | Important |
| Windows Backup Engine | CVE-2021-24079 | Windows Backup Engine Information Disclosure Vulnerability | Important |
| Windows Console Driver | CVE-2021-24098 | Windows Console Driver Denial of Service Vulnerability | Important |
| Windows Defender | CVE-2021-24092 | Microsoft Defender Elevation of Privilege Vulnerability | Important |
| Windows DirectX | CVE-2021-24106 | Windows DirectX Information Disclosure Vulnerability | Important |
| Windows Event Tracing | CVE-2021-24102 | Windows Event Tracing Elevation of Privilege Vulnerability | Important |
| Windows Event Tracing | CVE-2021-24103 | Windows Event Tracing Elevation of Privilege Vulnerability | Important |
| Windows Installer | CVE-2021-1727 | Windows Installer Elevation of Privilege Vulnerability | Important |
| Windows Kernel | CVE-2021-24096 | Windows Kernel Elevation of Privilege Vulnerability | Important |
| Windows Kernel | CVE-2021-1732 | Windows Win32k Elevation of Privilege Vulnerability | Important |
| Windows Kernel | CVE-2021-1698 | Windows Win32k Elevation of Privilege Vulnerability | Important |
| Windows Mobile Device Management | CVE-2021-24084 | Windows Mobile Device Management Information Disclosure Vulnerability | Important |
| Windows Network File System | CVE-2021-24075 | Windows Network File System Denial of Service Vulnerability | Important |
| Windows PFX Encryption | CVE-2021-1731 | PFX Encryption Security Feature Bypass Vulnerability | Important |
| Windows PKU2U | CVE-2021-25195 | Windows PKU2U Elevation of Privilege Vulnerability | Important |
| Windows PowerShell | CVE-2021-24082 | Microsoft.PowerShell.Utility Module WDAC Security Feature Bypass Vulnerability | Important |
| Windows Print Spooler Components | CVE-2021-24088 | Windows Local Spooler Remote Code Execution Vulnerability | Critical |
| Windows Remote Procedure Call | CVE-2021-1734 | Windows Remote Procedure Call Information Disclosure Vulnerability | Important |
| Windows TCP/IP | CVE-2021-24086 | Windows TCP/IP Denial of Service Vulnerability | Important |
| Windows TCP/IP | CVE-2021-24074 | Windows TCP/IP Remote Code Execution Vulnerability | Critical |
| Windows TCP/IP | CVE-2021-24094 | Windows TCP/IP Remote Code Execution Vulnerability | Critical |
| Windows Trust Verification API | CVE-2021-24080 | Windows Trust Verification API Denial of Service Vulnerability | Moderate |
Source: Bleeping Computer
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