CVE-2020-19107
📋 TL;DR
This CVE describes a SQL injection vulnerability in Online Book Store v1.0 that allows attackers to execute arbitrary SQL commands through the isbn parameter in edit_book.php. This could lead to data theft, modification, or deletion, and potentially remote code execution. Any organization using this specific PHP application is affected.
💻 Affected Systems
- Online Book Store Project in PHP
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data exfiltration, data destruction, and potential remote code execution on the database server.
Likely Case
Unauthorized access to sensitive book data, user information, and potential privilege escalation within the application.
If Mitigated
SQL injection attempts are blocked by input validation and parameterized queries, preventing any unauthorized database access.
🎯 Exploit Status
SQL injection via GET/POST parameter is well-understood and easily automated. The GitHub issue shows proof of concept.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified
Vendor Advisory: https://github.com/projectworldsofficial/online-book-store-project-in-php/issues/9
Restart Required: No
Instructions:
1. Review the GitHub issue for details. 2. Manually fix the SQL injection in edit_book.php by implementing parameterized queries. 3. Validate and sanitize all user inputs.
🔧 Temporary Workarounds
Web Application Firewall (WAF)
allDeploy a WAF to block SQL injection patterns targeting the isbn parameter.
Input Validation Filter
allAdd server-side validation to only accept valid ISBN formats for the isbn parameter.
🧯 If You Can't Patch
- Restrict access to edit_book.php using IP whitelisting or authentication requirements.
- Monitor logs for unusual SQL queries or error messages related to the isbn parameter.
🔍 How to Verify
Check if Vulnerable:
Test edit_book.php with SQL injection payloads in the isbn parameter (e.g., ' OR '1'='1). Check for database errors or unexpected behavior.Check Version:
Check the application files or repository for version indicators; typically in README or configuration files.Verify Fix Applied:
Retest with SQL injection payloads after applying fixes; ensure proper error handling and no SQL execution.📡 Detection & Monitoring
Log Indicators:
- SQL syntax errors in PHP/application logs
- Unusual database queries from edit_book.php
- Multiple failed requests to edit_book.php with suspicious parameters
Network Indicators:
- HTTP requests to edit_book.php containing SQL keywords (SELECT, UNION, etc.) in parameters
- Abnormal traffic patterns to the vulnerable endpoint
SIEM Query:
source="web_logs" AND uri="/edit_book.php" AND (param="isbn" AND value MATCHES "(?i)(SELECT|UNION|OR|AND|')")