CVE-2022-30461
📋 TL;DR
Water Billing Management System v1.0 contains a SQL injection vulnerability in the delete_client function that allows attackers to execute arbitrary SQL commands. This affects all installations of this specific billing software version. Attackers can potentially access, modify, or delete sensitive database information.
💻 Affected Systems
- Water Billing Management System
📦 What is this software?
Water Billing System by Water Billing System Project
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data theft, data destruction, or full system takeover via SQL injection to RCE chaining.
Likely Case
Unauthorized access to sensitive customer billing data, personal information, and potential financial fraud.
If Mitigated
Limited impact with proper input validation and database permissions restricting damage to non-critical data.
🎯 Exploit Status
Simple SQL injection via id parameter. Public proof-of-concept available in GitHub repository.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Implement workarounds or migrate to alternative software.
🔧 Temporary Workarounds
Input Validation Filter
allAdd parameter validation to only accept numeric IDs in the delete_client function
Modify /wbms/classes/Master.php to validate id parameter using is_numeric() or prepared statements
Web Application Firewall
allDeploy WAF with SQL injection protection rules
Configure WAF to block SQL injection patterns in URL parameters
🧯 If You Can't Patch
- Block external access to /wbms/classes/Master.php via firewall rules
- Implement database user with minimal permissions (read-only where possible)
🔍 How to Verify
Check if Vulnerable:
Test /wbms/classes/Master.php?f=delete_client&id=1' with SQL injection payloadsCheck Version:
Check software version in documentation or configuration filesVerify Fix Applied:
Verify input validation prevents SQL injection by testing with malicious payloads📡 Detection & Monitoring
Log Indicators:
- Unusual SQL errors in web server logs
- Multiple requests to delete_client with suspicious id parameters
Network Indicators:
- HTTP requests containing SQL keywords in URL parameters
- Unusual database query patterns
SIEM Query:
web.url:*Master.php?f=delete_client* AND (web.url:*UNION* OR web.url:*SELECT* OR web.url:*' OR '1'='1*)