CVE-2023-49970
📋 TL;DR
This SQL injection vulnerability in Customer Support System v1 allows attackers to execute arbitrary SQL commands via the subject parameter in the save_ticket function. This affects all deployments of Customer Support System v1 that haven't been patched or secured, potentially leading to complete database compromise.
💻 Affected Systems
- Customer Support System
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full database compromise including data theft, data manipulation, authentication bypass, and potential remote code execution if database permissions allow.
Likely Case
Unauthorized access to sensitive customer support data, ticket manipulation, and potential privilege escalation within the application.
If Mitigated
Limited impact with proper input validation and parameterized queries preventing SQL injection.
🎯 Exploit Status
Public exploit code exists on GitHub, making exploitation trivial for attackers with basic SQL injection knowledge.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch exists. Implement parameterized queries in /customer_support/ajax.php around the save_ticket function, specifically for the subject parameter.
🔧 Temporary Workarounds
Input Validation Filter
allAdd input validation to sanitize the subject parameter before processing
Edit /customer_support/ajax.php and add: $subject = mysqli_real_escape_string($conn, $_POST['subject']);
Web Application Firewall Rule
allBlock SQL injection patterns at the subject parameter
WAF rule: Block requests containing SQL keywords like UNION, SELECT, INSERT, DELETE, DROP in subject parameter
🧯 If You Can't Patch
- Block external access to /customer_support/ajax.php via firewall rules
- Implement strict input validation at the application layer for all user inputs
🔍 How to Verify
Check if Vulnerable:
Test by sending SQL injection payload in subject parameter: POST to /customer_support/ajax.php?action=save_ticket with subject=' OR '1'='1Check Version:
Check source code for version information in comments or configuration filesVerify Fix Applied:
Test with same SQL injection payload - should return error or sanitized response without executing SQL📡 Detection & Monitoring
Log Indicators:
- Unusual SQL errors in application logs
- Multiple failed login attempts following SQL injection patterns
- Unusual database queries from web server IP
Network Indicators:
- HTTP POST requests to /customer_support/ajax.php containing SQL keywords in parameters
- Unusual database port traffic from web server
SIEM Query:
source="web_logs" AND uri="/customer_support/ajax.php" AND (param="subject" AND value MATCHES "(?i)(union|select|insert|delete|drop|or|and)")