CVEs / CVE-2020-1147
CVE-2020-1147: Microsoft .NET Framework, SharePoint, and Visual Studio Remote Code Execution Vulnerability
- Known exploited in the CISA KEV catalog since 3 Nov 2021
- high 7.8 CVSS 3.1 (NVD)
- EPSS 95.8% chance of exploitation in the next 30 days, higher than 99% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
Microsoft .NET Framework, Microsoft SharePoint, and Visual Studio contain a remote code execution vulnerability when the software fails to check the source markup of XML file input. Successful exploitation allows an attacker to execute code in the context of the process responsible for deserialization of the XML content.
Description
A remote code execution vulnerability exists in .NET Framework, Microsoft SharePoint, and Visual Studio when the software fails to check the source markup of XML file input, aka '.NET Framework, SharePoint Server, and Visual Studio Remote Code Execution Vulnerability'.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Microsoft Microsoft SharePoint Enterprise Server | 2016 | — |
| Microsoft Microsoft SharePoint Enterprise Server | 2013 Service Pack 1 | — |
| Microsoft Microsoft SharePoint Server | 2019 | — |
| Microsoft Microsoft SharePoint Server | 2010 Service Pack 2 | — |
| Microsoft Microsoft Visual Studio 2019 | 16.0 | — |
| Microsoft Microsoft Visual Studio 2019 version 16.6 (includes 16.0 - 16.5) | unspecified | — |
| Microsoft Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8) | unspecified | — |
| Microsoft Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3) | unspecified | — |
| Microsoft .NET Core | 2.1 | — |
| Microsoft .NET Core | 3.1 | — |
| Microsoft Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 | Windows 7 for 32-bit Systems Service Pack 1 | — |
| Microsoft Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 | Windows 7 for x64-based Systems Service Pack 1 | — |
| Microsoft Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 | Windows 8.1 for 32-bit systems | — |
| Microsoft Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 | Windows 8.1 for x64-based systems | — |
| Microsoft Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 | Windows RT 8.1 | — |
| Microsoft Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 | Windows Server 2008 R2 for x64-based Systems Service Pack 1 | — |
| Microsoft Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 | Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | — |
| Microsoft Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 | Windows Server 2012 | — |
| Microsoft Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 | Windows Server 2012 (Server Core installation) | — |
| Microsoft Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 | Windows Server 2012 R2 | — |
| Microsoft Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 | Windows Server 2012 R2 (Server Core installation) | — |
| Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for 32-bit Systems | unspecified | — |
| Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for x64-based Systems | unspecified | — |
| Microsoft Microsoft .NET Framework 4.8 on Windows Server, version 1803 (Server Core Installation) | unspecified | — |
| Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1709 for 32-bit Systems | unspecified | — |
| Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1709 for x64-based Systems | unspecified | — |
| Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for 32-bit Systems | unspecified | — |
| Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for x64-based Systems | unspecified | — |
| Microsoft Microsoft .NET Framework 4.8 on Windows Server 2016 | unspecified | — |
| Microsoft Microsoft .NET Framework 4.8 on Windows Server 2016 (Server Core installation) | unspecified | — |
| Product | Affected | Fixed in |
|---|---|---|
| Microsoft.NETCore.App (NuGet) | from 2.1.0, before 2.1.20 | 2.1.20 |
| Microsoft.NETCore.App.Runtime.linux-arm (NuGet) | from 3.1.0, before 3.1.6 | 3.1.6 |
| Microsoft.NETCore.App.Runtime.linux-arm64 (NuGet) | from 3.1.0, before 3.1.6 | 3.1.6 |
| Microsoft.NETCore.App.Runtime.linux-musl-arm64 (NuGet) | from 3.1.0, before 3.1.6 | 3.1.6 |
| Microsoft.NETCore.App.Runtime.linux-musl-x64 (NuGet) | from 3.1.0, before 3.1.6 | 3.1.6 |
| Microsoft.NETCore.App.Runtime.linux-x64 (NuGet) | from 3.1.0, before 3.1.6 | 3.1.6 |
| Microsoft.NETCore.App.Runtime.osx-x64 (NuGet) | from 3.1.0, before 3.1.6 | 3.1.6 |
| Microsoft.NETCore.App.Runtime.rhel.6-x64 (NuGet) | from 3.1.0, before 3.1.6 | 3.1.6 |
| Microsoft.NETCore.App.Runtime.win-arm (NuGet) | from 3.1.0, before 3.1.6 | 3.1.6 |
| Microsoft.NETCore.App.Runtime.win-arm64 (NuGet) | from 3.1.0, before 3.1.6 | 3.1.6 |
| Microsoft.NETCore.App.Runtime.win-x64 (NuGet) | from 3.1.0, before 3.1.6 | 3.1.6 |
| Microsoft.NETCore.App.Runtime.win-x86 (NuGet) | from 3.1.0, before 3.1.6 | 3.1.6 |
Package versions from GHSA-g5vf-38cp-4px9.
Exploitation
| In CISA KEV since | 3 Nov 2021 |
|---|---|
| Due date for US federal agencies | 3 May 2022 |
| Used in ransomware campaigns | Unknown |
| Required action | Apply updates per vendor instructions. |
Severity
| CVSS 3.1 | 7.8 highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HScored by NVD |
|---|
References
- CVE-2020-1147 on NVD
- CVE-2020-1147 in the CISA KEV catalog
- CVE-2020-1147 on OSV
- http://packetstormsecurity.com/files/158694/SharePoint-DataSet-DataTable-Deserialization.html Exploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/158876/Microsoft-SharePoint-Server-2019-Remote-Code-Execution.html Exploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/163644/Microsoft-SharePoint-Server-2019-Remote-Code-Execution.html Exploit, Third Party Advisory, VDB Entry
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1147 Patch, Vendor Advisory
- https://www.exploitalert.com/view-details.html?id=35992 Exploit, Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-1147 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.