CVE-2020-0646: critical vulnerability in Microsoft .NET Framework 3.0
Published · Updated
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100Vexday Risk Score
Patch now. It under exploitation confirmed by CISA and has a working public exploit.
ssvc Actcvss 9.8epss 99%
from disclosure to weapon77 days
Published on NVDJan 14
1st PoC+77d
metasploit+48d
CISA KEV+659d
Action required by CISAfederal deadline: 2022-05-03
Apply updates per vendor instructions.
In short
Microsoft .NET Framework fails to properly validate user input, allowing attackers to execute malicious code remotely on affected systems. This is a critical vulnerability because it can give attackers complete control over the computer without needing special access.
Technical detail
A remote code execution vulnerability in .NET Framework's input validation mechanism (CWE-91: XML Injection) allows unauthenticated attackers to execute arbitrary code through specially crafted input, typically via network-accessible .NET applications. The vulnerability requires no user interaction and affects systems running vulnerable .NET Framework versions.
Summary generated and translated by AI from the official description.
The full analysis of this CVE is available in Portuguese →
A remote code execution vulnerability exists when the Microsoft .NET Framework fails to validate input properly, aka '.NET Framework Remote Code Execution Injection Vulnerability'.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
Microsoft · Microsoft .NET Framework 3.0Microsoft · Microsoft .NET Framework 3.5Microsoft · Microsoft .NET Framework 3.5.1Microsoft · Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for 32-bit SystemsMicrosoft · Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for x64-based SystemsMicrosoft · Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016Microsoft · Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 (Server Core installation)Microsoft · Microsoft .NET Framework 3.5 AND 4.7.1/4.7.2 on Windows 10 Version 1709 for 32-bit SystemsMicrosoft · Microsoft .NET Framework 3.5 AND 4.7.1/4.7.2 on Windows 10 Version 1709 for x64-based SystemsMicrosoft · Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 for 32-bit SystemsMicrosoft · Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 for x64-based SystemsMicrosoft · Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1803 for 32-bit SystemsMicrosoft · Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1803 for x64-based SystemsMicrosoft · Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for 32-bit SystemsMicrosoft · Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for x64-based SystemsMicrosoft · Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019Microsoft · Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019 (Server Core installation)Microsoft · Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server, version 1803 (Server Core Installation)Microsoft · Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for 32-bit SystemsMicrosoft · Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for x64-based SystemsMicrosoft · Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1903 for 32-bit SystemsMicrosoft · Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1903 for x64-based SystemsMicrosoft · Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1909 for 32-bit SystemsMicrosoft · Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1909 for x64-based SystemsMicrosoft · Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019Microsoft · Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 (Server Core installation)Microsoft · Microsoft .NET Framework 3.5 AND 4.8 on Windows Server, version 1903 (Server Core installation)Microsoft · Microsoft .NET Framework 3.5 AND 4.8 on Windows Server, version 1909 (Server Core installation)Microsoft · Microsoft .NET Framework 4.5.2Microsoft · Microsoft .NET Framework 4.6Microsoft · Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2Microsoft · Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2Microsoft · Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for 32-bit SystemsMicrosoft · Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for x64-based SystemsMicrosoft · Microsoft .NET Framework 4.8 on Windows 10 Version 1709 for 32-bit SystemsMicrosoft · Microsoft .NET Framework 4.8 on Windows 10 Version 1709 for x64-based SystemsMicrosoft · Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for 32-bit SystemsMicrosoft · Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for x64-based SystemsMicrosoft · Microsoft .NET Framework 4.8 on Windows 7 for 32-bit Systems Service Pack 1Microsoft · Microsoft .NET Framework 4.8 on Windows 7 for x64-based Systems Service Pack 1Microsoft · Microsoft .NET Framework 4.8 on Windows 8.1 for 32-bit systemsMicrosoft · Microsoft .NET Framework 4.8 on Windows 8.1 for x64-based systemsMicrosoft · Microsoft .NET Framework 4.8 on Windows RT 8.1Microsoft · Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1Microsoft · Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)Microsoft · Microsoft .NET Framework 4.8 on Windows Server 2012Microsoft · Microsoft .NET Framework 4.8 on Windows Server 2012 R2Microsoft · Microsoft .NET Framework 4.8 on Windows Server 2012 R2 (Server Core installation)Microsoft · Microsoft .NET Framework 4.8 on Windows Server 2012 (Server Core installation)Microsoft · Microsoft .NET Framework 4.8 on Windows Server 2016Microsoft · Microsoft .NET Framework 4.8 on Windows Server 2016 (Server Core installation)Microsoft · Microsoft .NET Framework 4.8 on Windows Server, version 1803 (Server Core Installation)public PoCs found — 2✓ VexDay Proof
exploitdb✓ VexDay Proofwww.exploit-db.com/exploits/48275cve_referencepacketstormsecurity.com/files/156930/SharePoint-Workflows-XOML-Injection.htmlunverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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