CVE-2019-0820 (High) detected in system.text.regularexpressions.4.3.0.nupkg

[mend-bolt-for-github]

CVE-2019-0820 - High Severity Vulnerability

Vulnerable Library - system.text.regularexpressions.4.3.0.nupkg

Provides the System.Text.RegularExpressions.Regex class, an implementation of a regular expression e...

Library home page: https://api.nuget.org/packages/system.text.regularexpressions.4.3.0.nupkg

Path to dependency file: /CSharpApp/CSharpApp.csproj

Path to vulnerable library: /home/wss-scanner/.nuget/packages/system.text.regularexpressions/4.3.0/system.text.regularexpressions.4.3.0.nupkg

Dependency Hierarchy:

• microsoft.visualstudio.web.codegeneration.design.3.0.0.nupkg (Root Library)
  • microsoft.visualstudio.web.codegenerators.mvc.3.0.0.nupkg
    • microsoft.visualstudio.web.codegeneration.3.0.0.nupkg
      • microsoft.visualstudio.web.codegeneration.entityframeworkcore.3.0.0.nupkg
        • microsoft.visualstudio.web.codegeneration.core.3.0.0.nupkg
          • microsoft.visualstudio.web.codegeneration.templating.3.0.0.nupkg
            • microsoft.visualstudio.web.codegeneration.utils.3.0.0.nupkg
              • nuget.frameworks.4.7.0.nupkg
                • netstandard.library.1.6.1.nupkg
                  • system.xml.xdocument.4.3.0.nupkg
                  • system.xml.readerwriter.4.3.0.nupkg
                  • ❌ system.text.regularexpressions.4.3.0.nupkg (Vulnerable Library)

Found in HEAD commit: 9b5311357d3032559459f96956cfe5f55c3d48af

Found in base branch: master

Vulnerability Details

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.
Mend Note: After conducting further research, Mend has determined that CVE-2019-0820 only affects environments with versions 4.3.0 and 4.3.1 only on netcore50 environment of system.text.regularexpressions.nupkg.

Publish Date: 2019-05-16

URL: CVE-2019-0820

CVSS 3 Score Details (7.5)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
• Impact Metrics:
  • Confidentiality Impact: None
  • Integrity Impact: None
  • Availability Impact: High

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: GHSA-cmhx-cq75-c4mj

Release Date: 2019-05-16

Fix Resolution: System.Text.RegularExpressions - 4.3.1

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