CVE-2020-1147: .NET Framework, SharePoint Server, and Visual Studio Remote Code Execution Vulnerability
CVE-2020-1147 · Severity: critical · CVSS 3.1 · Exploited in the wild · Published 2022-05-24
A remote code execution vulnerability exists in Microsoft .NET Framework, SharePoint, and Visual Studio due to improper validation of source markup in XML file input. An attacker can exploit this by providing malicious XML content, leading to code execution during the deserialization process.
Yes. CVE-2020-1147 is known to be exploited in the wild, first recorded on 3 November 2021. Treat it as urgent.
How severe is CVE-2020-1147?
Critical severity, with a CVSS score of 3.1, published 24 May 2022.
Which products and versions are affected?
Microsoft.NETCore.App (NuGet) ECOSYSTEM:introduced=2.1.0,fixed=2.1.20; Microsoft.NetCore.App.Runtime.linux-arm (NuGet) ECOSYSTEM:introduced=3.1.0,fixed=3.1.6; Microsoft.NetCore.App.Runtime.linux-arm64 (NuGet) ECOSYSTEM:introduced=3.1.0,fixed=3.1.6; Microsoft.NetCore.App.Runtime.linux-musl-arm64 (NuGet) ECOSYSTEM:introduced=3.1.0,fixed=3.1.6; and 8 more.
Is there a fix for CVE-2020-1147?
Yes. Microsoft.NETCore.App (NuGet): upgrade to 2.1.20 or later; Microsoft.NetCore.App.Runtime.linux-arm (NuGet): upgrade to 3.1.6 or later; Microsoft.NetCore.App.Runtime.linux-arm64 (NuGet): upgrade to 3.1.6 or later; Microsoft.NetCore.App.Runtime.linux-musl-arm64 (NuGet): upgrade to 3.1.6 or later; Microsoft.NetCore.App.Runtime.linux-musl-x64 (NuGet): upgrade to 3.1.6 or later; Microsoft.NetCore.App.Runtime.linux-x64 (NuGet): upgrade to 3.1.6 or later; Microsoft.NetCore.App.Runtime.osx-x64 (NuGet): upgrade to 3.1.6 or later; Microsoft.NETCore.App.Runtime.rhel.6-x64 (NuGet): upgrade to 3.1.6 or later; Microsoft.NetCore.App.Runtime.win-arm (NuGet): upgrade to 3.1.6 or later; Microsoft.NetCore.App.Runtime.win-arm64 (NuGet): upgrade to 3.1.6 or later; Microsoft.NetCore.App.Runtime.win-x64 (NuGet): upgrade to 3.1.6 or later; Microsoft.NetCore.App.Runtime.win-x86 (NuGet): upgrade to 3.1.6 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2020-1147 attacked?
It is attacked with local access, in a software library.
Am I affected by CVE-2020-1147?
Check whether you run Microsoft .NET Framework, Microsoft SharePoint, Microsoft Visual Studio or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
Microsoft.NETCore.App (NuGet): upgrade to 2.1.20 or later