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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 secrets are security-sensitive

        responsibility - trustworthy
        security
        Security Hotspot
        • cwe

        Because it is easy to extract strings from an application source code or binary, secrets 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-2022-25510
        • CVE-2021-42635

        Secrets should be stored outside of the source code in a configuration file or a management service for secrets.

        This rule detects variables/fields/properties having a name matching a list of words (secret, token, credential, auth, api[_.-]?key) being assigned a pseudorandom hard-coded value. The pseudorandomness of the hard-coded value is based on its entropy and the probability to be human-readable. The randomness sensibility can be adjusted if needed. Lower values will detect less random values, raising potentially more false positives.

        Ask Yourself Whether

        • The secret allows access to a sensitive component like a database, a file storage, an API, or a service.
        • The secret is used in a production environment.
        • Application re-distribution is required before updating the secret.

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

        Recommended Secure Coding Practices

        • Store the secret in a configuration file that is not pushed to the code repository.
        • Use your cloud provider’s service for managing secrets.
        • If a secret has been disclosed through the source code: revoke it and create a new one.

        Sensitive Code Example

        const string mySecret = "47828a8dd77ee1eb9dde2d5e93cb221ce8c32b37";
        

        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
        • MSC - MSC03-J - Never hard code sensitive information
          Available In:
        • SonarQube IdeCatch issues on the fly,
          in your IDE
        • SonarQube CloudDetect issues in your GitHub, Azure DevOps Services, Bitbucket Cloud, GitLab repositories
        • SonarQube Community BuildAnalyze code in your
          on-premise CI
          Available Since
          24.12
        • SonarQube ServerAnalyze code in your
          on-premise CI
          Developer Edition
          Available Since
          10.8

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