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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
 
Tags
    Impact
      Clean code attribute
        1. Using unsafe code blocks is security-sensitive

           Security Hotspot
        2. Not specifying a timeout for regular expressions is security-sensitive

           Security Hotspot
        3. Hard-coded secrets are security-sensitive

           Security Hotspot
        4. Constructing arguments of system commands from user input is security-sensitive

           Security Hotspot
        5. Deserializing objects without performing data validation is security-sensitive

           Security Hotspot
        6. Disabling ASP.NET "Request Validation" feature is security-sensitive

           Security Hotspot
        7. Allowing requests with excessive content length is security-sensitive

           Security Hotspot
        8. Using publicly writable directories is security-sensitive

           Security Hotspot
        9. Using clear-text protocols is security-sensitive

           Security Hotspot
        10. Having a permissive Cross-Origin Resource Sharing policy is security-sensitive

           Security Hotspot
        11. Expanding archive files without controlling resource consumption is security-sensitive

           Security Hotspot
        12. Configuring loggers is security-sensitive

           Security Hotspot
        13. Using weak hashing algorithms is security-sensitive

           Security Hotspot
        14. Delivering code in production with debug features activated is security-sensitive

           Security Hotspot
        15. Disabling CSRF protections is security-sensitive

           Security Hotspot
        16. Searching OS commands in PATH is security-sensitive

           Security Hotspot
        17. Creating cookies without the "HttpOnly" flag is security-sensitive

           Security Hotspot
        18. Setting loose file permissions is security-sensitive

           Security Hotspot
        19. Using non-standard cryptographic algorithms is security-sensitive

           Security Hotspot
        20. Using pseudorandom number generators (PRNGs) is security-sensitive

           Security Hotspot
        21. Creating cookies without the "secure" flag is security-sensitive

           Security Hotspot
        22. Formatting SQL queries is security-sensitive

           Security Hotspot
        23. Hard-coded credentials are security-sensitive

           Security Hotspot
        24. Using hardcoded IP addresses is security-sensitive

           Security Hotspot

        Hard-coded credentials are security-sensitive

        responsibility - trustworthy
        security
        Security Hotspot
        • cwe

        Because it is easy to extract strings from an application source code or binary, credentials should not be hard-coded. This is particularly true for applications that are distributed or that are open-source.

        In the past, it has led to the following vulnerabilities:

        • CVE-2019-13466
        • CVE-2018-15389

        Credentials should be stored outside of the code in a configuration file, a database, or a management service for secrets.

        This rule flags instances of hard-coded credentials used in database and LDAP connections. It looks for hard-coded credentials in connection strings, and for variable names that match any of the patterns from the provided list.

        Ask Yourself Whether

        • Credentials allow access to a sensitive component like a database, a file storage, an API or a service.
        • Credentials are used in production environments.
        • Application re-distribution is required before updating the credentials.

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

        Recommended Secure Coding Practices

        • Store the credentials in a configuration file that is not pushed to the code repository.
        • Store the credentials in a database.
        • Use your cloud provider’s service for managing secrets.
        • If a password has been disclosed through the source code: change it.

        Sensitive Code Example

        string username = "admin";
        string password = "Admin123"; // Sensitive
        string usernamePassword  = "user=admin&password=Admin123"; // Sensitive
        string url = "scheme://user:Admin123@domain.com"; // Sensitive
        

        Compliant Solution

        string username = "admin";
        string password = GetEncryptedPassword();
        string usernamePassword = string.Format("user={0}&password={1}", GetEncryptedUsername(), GetEncryptedPassword());
        string url = $"scheme://{username}:{password}@domain.com";
        
        string url2 = "http://guest:guest@domain.com"; // Compliant
        const string Password_Property = "custom.password"; // Compliant
        

        Exceptions

        • Issue is not raised when URI username and password are the same.
        • Issue is not raised when searched pattern is found in variable name and value.

        See

        • OWASP - Top 10 2021 Category A7 - Identification and Authentication Failures
        • OWASP - Top 10 2017 Category A2 - Broken Authentication
        • CWE - CWE-798 - Use of Hard-coded Credentials
        • CWE - CWE-259 - Use of Hard-coded Password
        • Derived from FindSecBugs rule Hard Coded Password
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          in your IDE
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          on-premise CI
          Available Since
          9.1
        • SonarQube ServerAnalyze code in your
          on-premise CI
          Developer Edition
          Available Since
          9.1

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