CVE-2020-19114
📋 TL;DR
This CVE describes a SQL injection vulnerability in Online Book Store v1.0 that allows remote attackers to execute arbitrary SQL commands via the publisher parameter in edit_book.php. Attackers can potentially read, modify, or delete database content, and in worst cases execute arbitrary code on the server. Anyone running this specific PHP application version is affected.
💻 Affected Systems
- Online Book Store
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data theft, data destruction, and remote code execution on the server, potentially allowing full system takeover.
Likely Case
Database information disclosure, data manipulation, and potential privilege escalation within the application.
If Mitigated
Attack blocked at web application firewall level with no database access achieved.
🎯 Exploit Status
SQL injection via publisher parameter is straightforward to exploit with common SQLi techniques.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
1. Review the GitHub issue for community fixes. 2. Manually implement parameterized queries in edit_book.php. 3. Validate and sanitize all user inputs. 4. Test thoroughly before deployment.
🔧 Temporary Workarounds
Input Validation and Sanitization
allAdd input validation to reject malicious publisher parameter values
// PHP code to sanitize input: $publisher = mysqli_real_escape_string($conn, $_POST['publisher']);
Web Application Firewall Rule
allBlock SQL injection patterns in publisher parameter
ModSecurity rule: SecRule ARGS:publisher "@detectSQLi" "id:1001,phase:2,deny,status:403"
🧯 If You Can't Patch
- Implement network segmentation to isolate the vulnerable system
- Deploy a web application firewall with SQL injection detection rules
🔍 How to Verify
Check if Vulnerable:
Test edit_book.php with SQL injection payloads in publisher parameter (e.g., ' OR '1'='1)Check Version:
Check application version in source code or configuration filesVerify Fix Applied:
Attempt SQL injection tests and verify they are blocked or sanitized📡 Detection & Monitoring
Log Indicators:
- Unusual SQL queries in database logs
- Multiple failed login attempts after publisher parameter manipulation
- Long or suspicious publisher parameter values in web logs
Network Indicators:
- HTTP POST requests to edit_book.php with SQL keywords in parameters
- Unusual database connection patterns from web server
SIEM Query:
source="web_logs" AND uri="/edit_book.php" AND (publisher="*OR*" OR publisher="*UNION*" OR publisher="*SELECT*")