Blind Sql Injection in https://████

How it was found

Bug Bounty Report

Summary

A SQL injection vulnerability was discovered in the User-Agent parameter of the website https://██████████/. This vulnerability allows an attacker to inject SQL commands through the User-Agent HTTP header, potentially leading to unauthorized access to sensitive data stored in the backend database.

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Impact

• Successful exploitation of this vulnerability allows an attacker to execute arbitrary SQL commands on the backend database management system (MySQL >= 8.0.0, MariaDB fork).
  • Potential impact includes unauthorized access to sensitive data, manipulation of database content, and even complete compromise of the database server

System Host(s)

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Affected Product(s) and Version(s)

CVE Numbers

Steps to Reproduce

1. SQLMap Command:

   sqlmap --url "https://█████████/" --batch --random-agent --level 5 --risk 3
   

2. Injection Point Identified:

   Parameter: User-Agent (User-Agent)
       Type: boolean-based blind
       Title: OR boolean-based blind - WHERE or HAVING clause
       Payload: -5127 OR 2687=2687
   

Suggested Mitigation/Remediation Actions

Recommendations

• Immediate Mitigation:

  • Implement input validation and parameterized queries to sanitize user inputs, especially HTTP headers like User-Agent.
  • Apply web application firewall (WAF) rules to detect and block SQL injection attempts.

• Long-term Solutions:

  • Regular security assessments and penetration testing to identify and remediate vulnerabilities.
  • Educate developers about secure coding practices, including input validation and output encoding.