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Showing content from https://docs.microsoft.com/en-us/dotnet/fundamentals/code-analysis/quality-rules/ca3006 below:

CA3006: Review code for process command injection vulnerabilities (code analysis) - .NET

Potentially untrusted HTTP request input reaches a process command.

By default, this rule analyzes the entire codebase, but this is configurable.

When working with untrusted input, be mindful of command injection attacks. A command injection attack can execute malicious commands on the underlying operating system, compromising the security and integrity of your server.

This rule attempts to find input from HTTP requests reaching a process command.

Note

This rule can't track data across assemblies. For example, if one assembly reads the HTTP request input and then passes it to another assembly that starts a process, this rule won't produce a warning.

Note

There is a configurable limit to how deep this rule will analyze data flow across method calls. See Analyzer Configuration for how to configure the limit in an EditorConfig file.

• If possible, avoid starting processes based on user input.
• Validate input against a known safe set of characters and length.

If you know the input has been validated or escaped to be safe, it's safe to suppress this warning.

If you just want to suppress a single violation, add preprocessor directives to your source file to disable and then re-enable the rule.

#pragma warning disable CA3006
// The code that's violating the rule is on this line.
#pragma warning restore CA3006

To disable the rule for a file, folder, or project, set its severity to none in the configuration file.

[*.{cs,vb}]
dotnet_diagnostic.CA3006.severity = none

For more information, see How to suppress code analysis warnings.

Use the following options to configure which parts of your codebase to run this rule on.

• Exclude specific symbols
• Exclude specific types and their derived types

You can configure these options for just this rule, for all rules they apply to, or for all rules in this category (Security) that they apply to. For more information, see Code quality rule configuration options.

You can exclude specific symbols, such as types and methods, from analysis by setting the excluded_symbol_names option. For example, to specify that the rule should not run on any code within types named MyType, add the following key-value pair to an .editorconfig file in your project:

dotnet_code_quality.CAXXXX.excluded_symbol_names = MyType

Note

Replace the XXXX part of CAXXXX with the ID of the applicable rule.

Allowed symbol name formats in the option value (separated by |):

• Symbol name only (includes all symbols with the name, regardless of the containing type or namespace).
• Fully qualified names in the symbol's documentation ID format. Each symbol name requires a symbol-kind prefix, such as M: for methods, T: for types, and N: for namespaces.
• .ctor for constructors and .cctor for static constructors.

Examples:

You can exclude specific types and their derived types from analysis by setting the excluded_type_names_with_derived_types option. For example, to specify that the rule should not run on any methods within types named MyType and their derived types, add the following key-value pair to an .editorconfig file in your project:

dotnet_code_quality.CAXXXX.excluded_type_names_with_derived_types = MyType

Note

Replace the XXXX part of CAXXXX with the ID of the applicable rule.

Allowed symbol name formats in the option value (separated by |):

• Type name only (includes all types with the name, regardless of the containing type or namespace).
• Fully qualified names in the symbol's documentation ID format, with an optional T: prefix.

Examples:

using System;
using System.Diagnostics;

public partial class WebForm : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        string input = Request.Form["in"];
        Process p = Process.Start(input);
    }
}

Imports System
Imports System.Diagnostics

Partial Public Class WebForm
    Inherits System.Web.UI.Page

    Protected Sub Page_Load(sender As Object, eventArgs as EventArgs)
        Dim input As String = Me.Request.Form("in")
        Dim p As Process = Process.Start(input)
    End Sub
End Class

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