Unsanitized user input in LDAP request

• Rule ID: java_lang_ldap_injection
• Languages: java
• Source: ldap_injection.yml

Description

Using unsanitized user input in an LDAP request can lead to LDAP injection, which is when attackers can modify the LDAP tree structure by injecting malicious input. It's crucial to ensure that data passed to an LDAP query is either not controlled by the user or is properly sanitized.

Remediations

• Do sanitize user input before including it in LDAP queries to prevent LDAP injection attacks.

  public class Cls extends HttpServlet
  {
  
      public void handleRequest(HttpServletRequest request, HttpServletResponse response)
      {
          String userID = request.getParameter("userID");
          String sanitizedUserID = sanitize(userID); // Ensure sanitization method effectively neutralizes LDAP injection vectors
  
          String filter = "(&(objectclass=person))(|(uid=" + sanitizedUserID + ")(street={0}))";
          String base = "ou=users,ou=system";
          Object[] filters = new Object[] {"First avenue"};
          javax.naming.directory.SearchControls sc = new javax.naming.directory.SearchControls();
  
          dirContext.search(base, filter, filters, sc);
      }
  }

References

• LDAP Injection
• LDAP Injection Prevention Cheat Sheet

Associated CWE

• CWE-90: Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection')

OWASP Top 10

• A03:2021 - Injection

Configuration

To skip this rule during a scan, use the following flag

bearer scan /path/to/your-project/ --skip-rule=java_lang_ldap_injection

To run only this rule during a scan, use the following flag

bearer scan /path/to/your-project/ --only-rule=java_lang_ldap_injection