Nikto detects vulnerabilities through a systematic scanning process that involves several key techniques:
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Database of Tests: Nikto has a comprehensive database of known vulnerabilities, security issues, and misconfigurations. It uses this database to check against the target web server for potential vulnerabilities.
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HTTP Requests: Nikto sends various HTTP requests to the target server, probing for specific vulnerabilities. This includes checking for common files, directories, and scripts that may be vulnerable.
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Configuration Checks: It examines server configurations for common security misconfigurations, such as default files, unnecessary HTTP methods (e.g., TRACE, OPTIONS), and insecure permissions.
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Version Detection: Nikto can identify the version of the web server and associated software. By knowing the version, it can check for known vulnerabilities associated with that specific version.
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Cross-Site Scripting (XSS) and SQL Injection Tests: Nikto includes tests for common web application vulnerabilities, such as XSS and SQL injection, by injecting payloads into parameters and observing the server's response.
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SSL/TLS Checks: For HTTPS servers, Nikto can assess SSL/TLS configurations, checking for weak ciphers, expired certificates, and other security issues.
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Customizable Tuning Options: Users can customize scans using tuning options to focus on specific types of vulnerabilities, allowing for targeted assessments.
By combining these techniques, Nikto effectively identifies potential vulnerabilities and security issues in web applications, providing valuable insights for remediation and improving overall security posture.
