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OpenAdvisories
High · 7.5 CVE-2019-0820 EUVD-2021-1682GHSA-cmhx-cq75-c4mj

Regular Expression Denial of Service in System.Text.RegularExpressions

Published May 16, 2019 · Updated Aug 4, 2024 · Assigned by microsoft

Vendor: Microsoft Product: .NET Core Product: Microsoft .NET Framework 2.0 Product: Microsoft .NET Framework 3.0 Product: Microsoft .NET Framework 3.5 Product: Microsoft .NET Framework 3.5 on Windows 10 Version 1903 for 32-bit Systems Product: Microsoft .NET Framework 3.5 on Windows 10 Version 1903 for x64-based Systems Product: Microsoft .NET Framework 3.5 on Windows Server, version 1903 (Server Core installation) Product: Microsoft .NET Framework 3.5.1 Product: Microsoft .NET Framework 4.5.2 Product: Microsoft .NET Framework 4.6 Product: Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 Product: Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 Product: Microsoft .NET Framework 4.7.2 Product: Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for 32-bit Systems Product: Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for x64-based Systems Product: Microsoft .NET Framework 4.8 on Windows 10 Version 1703 for 32-bit Systems Product: Microsoft .NET Framework 4.8 on Windows 10 Version 1703 for x64-based Systems Product: Microsoft .NET Framework 4.8 on Windows 10 Version 1709 for 32-bit Systems Product: Microsoft .NET Framework 4.8 on Windows 10 Version 1709 for x64-based Systems Product: Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for 32-bit Systems Product: Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for x64-based Systems Product: Microsoft .NET Framework 4.8 on Windows 10 Version 1809 for 32-bit Systems Product: Microsoft .NET Framework 4.8 on Windows 10 Version 1809 for x64-based Systems Product: Microsoft .NET Framework 4.8 on Windows 10 Version 1903 for 32-bit Systems Product: Microsoft .NET Framework 4.8 on Windows 10 Version 1903 for x64-based Systems Product: Microsoft .NET Framework 4.8 on Windows 7 for 32-bit Systems Service Pack 1 Product: Microsoft .NET Framework 4.8 on Windows 7 for x64-based Systems Service Pack 1 Product: Microsoft .NET Framework 4.8 on Windows 8.1 for 32-bit systems Product: Microsoft .NET Framework 4.8 on Windows 8.1 for x64-based systems Product: Microsoft .NET Framework 4.8 on Windows RT 8.1 Product: Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) Product: Microsoft .NET Framework 4.8 on Windows Server 2012 Product: Microsoft .NET Framework 4.8 on Windows Server 2012 (Server Core installation) Product: Microsoft .NET Framework 4.8 on Windows Server 2012 R2 Product: Microsoft .NET Framework 4.8 on Windows Server 2012 R2 (Server Core installation) Product: Microsoft .NET Framework 4.8 on Windows Server 2016 Product: Microsoft .NET Framework 4.8 on Windows Server 2016 (Server Core installation) Product: Microsoft .NET Framework 4.8 on Windows Server 2019 Product: Microsoft .NET Framework 4.8 on Windows Server 2019 (Server Core installation) Product: Microsoft .NET Framework 4.8 on Windows Server, version 1803 (Server Core Installation) Product: Microsoft .NET Framework 4.8 on Windows Server, version 1903 (Server Core installation) Package: System.Text.RegularExpressions Platform: Windows Ecosystem: NuGet

Description

A denial of service vulnerability exists when .NET Framework and .NET Core improperly process RegEx strings, aka '.NET Framework and .NET Core Denial of Service Vulnerability'. This CVE ID is unique from CVE-2019-0980, CVE-2019-0981.

Affected products

VendorProductAffectedFixed
Microsoft Microsoft .NET Framework 4.5.2 Windows 7 for 32-bit Systems Service Pack 1, Windows 7 for x64-based Systems Service Pack 1, Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation), Windows Server 2008 R2 for x64-based Systems Service Pack 1, Windows Server 2012, Windows Server 2012 (Server Core ins… —
Microsoft Microsoft .NET Framework 4.6 Windows Server 2008 for 32-bit Systems Service Pack 2, Windows Server 2008 for x64-based Systems Service Pack 2 —
Microsoft .NET Core 1, 1.1, 2.1, 2.2 —
Microsoft Microsoft .NET Framework 4.7.2 Windows 10 Version 1803 for 32-bit Systems, Windows 10 Version 1803 for x64-based Systems, Windows Server, version 1803 (Server Core Installation), Windows 10 Version 1803 for ARM64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation) —
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, Windows 7 for x64-based Systems Service Pack 1, Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation), Windows Server 2008 R2 for x64-based Systems Service Pack 1, Windows Server 2012, Windows Server 2012 (Server Core ins… —
Microsoft Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 Windows Server 2016, Windows Server 2016 (Server Core installation) —
Microsoft Microsoft .NET Framework 4.8 on Windows 7 for 32-bit Systems Service Pack 1 unspecified —
Microsoft Microsoft .NET Framework 4.8 on Windows 7 for x64-based Systems Service Pack 1 unspecified —
Microsoft Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) unspecified —
Microsoft Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 unspecified —
Microsoft Microsoft .NET Framework 4.8 on Windows Server 2012 unspecified —
Microsoft Microsoft .NET Framework 4.8 on Windows Server 2012 (Server Core installation) unspecified —
Microsoft Microsoft .NET Framework 4.8 on Windows 8.1 for 32-bit systems unspecified —
Microsoft Microsoft .NET Framework 4.8 on Windows 8.1 for x64-based systems unspecified —
Microsoft Microsoft .NET Framework 4.8 on Windows Server 2012 R2 unspecified —
Microsoft Microsoft .NET Framework 4.8 on Windows RT 8.1 unspecified —
Microsoft Microsoft .NET Framework 4.8 on Windows Server 2012 R2 (Server Core installation) unspecified —
Microsoft Microsoft .NET Framework 4.8 on Windows Server 2016 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 (Server Core installation) unspecified —
Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1703 for 32-bit Systems unspecified —
Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1703 for x64-based Systems 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 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 1809 for 32-bit Systems unspecified —
Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1809 for x64-based Systems unspecified —
Microsoft Microsoft .NET Framework 4.8 on Windows Server 2019 unspecified —
Microsoft Microsoft .NET Framework 4.8 on Windows Server 2019 (Server Core installation) unspecified —
Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1903 for 32-bit Systems unspecified —
Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1903 for x64-based Systems unspecified —
Microsoft Microsoft .NET Framework 4.8 on Windows Server, version 1903 (Server Core installation) unspecified —
Microsoft Microsoft .NET Framework 3.5 Windows Server 2012, Windows Server 2012 (Server Core installation), Windows 8.1 for 32-bit systems, Windows 8.1 for x64-based systems, Windows Server 2012 R2, Windows Server 2012 R2 (Server Core installation), Windows 10 for 32-bit Systems, Windows 10 for x64-based Systems, Windows Server 2016, Wi… —
Microsoft Microsoft .NET Framework 3.5 on Windows 10 Version 1903 for 32-bit Systems unspecified —
Microsoft Microsoft .NET Framework 3.5 on Windows 10 Version 1903 for x64-based Systems unspecified —
Microsoft Microsoft .NET Framework 3.5 on Windows Server, version 1903 (Server Core installation) unspecified —
Microsoft Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for Itanium-Based Systems Service Pack 2, Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2, Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2 —
Microsoft Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for Itanium-Based Systems Service Pack 2, Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2, Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2 —
Microsoft Microsoft .NET Framework 3.5.1 Windows 7 for 32-bit Systems Service Pack 1, Windows 7 for x64-based Systems Service Pack 1, Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation), Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1, Windows Server 2008 R2 for x64-based Systems Service … —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

Red Hat

Security tracker ↗
ReleasePackageFixed inAdvisory
RHEL 8 dotnet +2 2.1.507-2.el8_0 RHSA-2019:1259
RHEL 8 dotnet-host +2 2.1.11-2.el8_0 RHSA-2019:1259
Show 2 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Red Hat Rhel Dotnet 2 rh-dotnet21 +1 2.1-10.el7 RHSA-2019:1236
Red Hat Rhel Dotnet 2 rh-dotnet21-dotnet +2 2.1.507-2.el7 RHSA-2019:1236
Red Hat Rhel Dotnet 2 rh-dotnet21-dotnet-host +1 2.1.11-2.el7 RHSA-2019:1236
Red Hat Rhel Dotnet 2 rh-dotnet22 +1 2.2-7.el7 RHSA-2019:1236
Red Hat Rhel Dotnet 2 rh-dotnet22-curl +2 7.61.1-2.el7 RHSA-2019:1236
Red Hat Rhel Dotnet 2 rh-dotnet22-dotnet +2 2.2.107-2.el7 RHSA-2019:1236
Red Hat Rhel Dotnet 2 rh-dotnet22-dotnet-host +2 2.2.5-2.el7 RHSA-2019:1236
Red Hat Rhel Dotnet 1 rh-dotnetcore10-dotnetcore 1.0.16-1.el7 RHSA-2019:1236
Red Hat Rhel Dotnet 1 rh-dotnetcore11-dotnetcore 1.1.13-1.el7 RHSA-2019:1236

Oracle Linux

ReleasePackageFixed inAdvisory
Oracle Linux 8 dotnet +2 2.1.507-2.el8_0 ELSA-2019-1259
Oracle Linux 8 dotnet-host +2 2.1.11-2.el8_0 ELSA-2019-1259

Affected packages

EcosystemPackageAffectedFixedRecord
NuGet System.Text.RegularExpressions >= 4.3.0, < 4.3.1 4.3.1 GHSA-cmhx-cq75-c4mj

Advisories 3

References