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C#

C# static code analysis

Unique rules to find Bugs, Vulnerabilities, Security Hotspots, and Code Smells in your C# code

  • All rules 493
  • Vulnerability46
  • Bug88
  • Security Hotspot24
  • Code Smell335

  • Quick Fix 61
Filtered: 26 rules found
injection
    Impact
      Clean code attribute
        1. Server-side requests should not be vulnerable to traversing attacks

           Vulnerability
        2. Stack traces should not be disclosed

           Vulnerability
        3. Loop boundaries should not be vulnerable to injection attacks

           Vulnerability
        4. Connection strings should not be vulnerable to injections attacks

           Vulnerability
        5. Memory allocations should not be vulnerable to Denial of Service attacks

           Vulnerability
        6. Accessing files should not lead to filesystem oracle attacks

           Vulnerability
        7. Environment variables should not be defined from untrusted input

           Vulnerability
        8. XML operations should not be vulnerable to injection attacks

           Vulnerability
        9. Constructing arguments of system commands from user input is security-sensitive

           Security Hotspot
        10. Applications should not create session cookies from untrusted input

           Vulnerability
        11. Reflection should not be vulnerable to injection attacks

           Vulnerability
        12. Extracting archives should not lead to zip slip vulnerabilities

           Vulnerability
        13. OS commands should not be vulnerable to argument injection attacks

           Vulnerability
        14. Dynamic code execution should not be vulnerable to injection attacks

           Vulnerability
        15. NoSQL operations should not be vulnerable to injection attacks

           Vulnerability
        16. HTTP request redirections should not be open to forging attacks

           Vulnerability
        17. Logging should not be vulnerable to injection attacks

           Vulnerability
        18. Server-side requests should not be vulnerable to forging attacks

           Vulnerability
        19. Deserialization should not be vulnerable to injection attacks

           Vulnerability
        20. Endpoints should not be vulnerable to reflected cross-site scripting (XSS) attacks

           Vulnerability
        21. Database queries should not be vulnerable to injection attacks

           Vulnerability
        22. Regular expressions should not be vulnerable to Denial of Service attacks

           Vulnerability
        23. XPath expressions should not be vulnerable to injection attacks

           Vulnerability
        24. I/O function calls should not be vulnerable to path injection attacks

           Vulnerability
        25. LDAP queries should not be vulnerable to injection attacks

           Vulnerability
        26. OS commands should not be vulnerable to command injection attacks

           Vulnerability

        Constructing arguments of system commands from user input is security-sensitive

        intentionality - logical
        security
        Security Hotspot
        • cwe
        • injection

        Constructing arguments of system commands from user input is security-sensitive. It has led in the past to the following vulnerabilities:

        • CVE-2016-9920
        • CVE-2021-29472

        Arguments of system commands are processed by the executed program. The arguments are usually used to configure and influence the behavior of the programs. Control over a single argument might be enough for an attacker to trigger dangerous features like executing arbitrary commands or writing files into specific directories.

        Ask Yourself Whether

        • Malicious arguments can result in undesired behavior in the executed command.
        • Passing user input to a system command is not necessary.

        There is a risk if you answered yes to any of those questions.

        Recommended Secure Coding Practices

        • Avoid constructing system commands from user input when possible.
        • Ensure that no risky arguments can be injected for the given program, e.g., type-cast the argument to an integer.
        • Use a more secure interface to communicate with other programs, e.g., the standard input stream (stdin).

        Sensitive Code Example

        Arguments like -delete or -exec for the find command can alter the expected behavior and result in vulnerabilities:

        using System.Diagnostics;
        Process p = new Process();
        p.StartInfo.FileName = "/usr/bin/find";
        p.StartInfo.ArgumentList.Add(input); // Sensitive
        

        Compliant Solution

        Use an allow-list to restrict the arguments to trusted values:

        using System.Diagnostics;
        Process p = new Process();
        p.StartInfo.FileName = "/usr/bin/find";
        if (allowed.Contains(input)) {
          p.StartInfo.ArgumentList.Add(input);
        }
        

        See

        • OWASP - Top 10 2021 Category A3 - Injection
        • OWASP - Top 10 2017 Category A1 - Injection
        • CWE - CWE-88 - Argument Injection or Modification
        • CVE-2021-29472 - PHP Supply Chain Attack on Composer
        • STIG Viewer - Application Security and Development: V-222609 - The application must not be subject to input handling vulnerabilities.
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        • SonarQube CloudDetect issues in your GitHub, Azure DevOps Services, Bitbucket Cloud, GitLab repositories
        • SonarQube ServerAnalyze code in your
          on-premise CI
          Developer Edition
          Available Since
          9.2

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