CVE-2023-35066
📋 TL;DR
This SQL injection vulnerability in Infodrom Software's E-Invoice Approval System allows attackers to execute arbitrary SQL commands through unvalidated user input. All organizations using versions before v.20230701 are affected, potentially exposing sensitive invoice data and system control.
💻 Affected Systems
- Infodrom Software E-Invoice Approval System
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data theft, system takeover, and lateral movement to connected systems
Likely Case
Unauthorized access to invoice data, financial information disclosure, and potential data manipulation
If Mitigated
Limited impact with proper input validation and database permissions restricting damage to non-critical data
🎯 Exploit Status
SQL injection typically requires minimal technical skill with widely available tools
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v.20230701
Vendor Advisory: https://www.usom.gov.tr/bildirim/tr-23-0419
Restart Required: Yes
Instructions:
1. Download v.20230701 from vendor
2. Backup current installation and database
3. Stop application services
4. Apply update following vendor documentation
5. Restart services and verify functionality
🔧 Temporary Workarounds
Web Application Firewall (WAF)
allDeploy WAF with SQL injection rules to block malicious requests
Database Permission Reduction
allLimit application database user to minimum required permissions
REVOKE ALL PRIVILEGES ON database.* FROM 'app_user'@'%';
GRANT SELECT, INSERT, UPDATE ON specific_tables TO 'app_user'@'%';
🧯 If You Can't Patch
- Isolate the system in a separate network segment with strict access controls
- Implement comprehensive input validation and parameterized queries in custom code
🔍 How to Verify
Check if Vulnerable:
Check application version in admin panel or configuration filesCheck Version:
Check application web interface or config files for version informationVerify Fix Applied:
Confirm version is v.20230701 or later and test SQL injection attempts are blocked📡 Detection & Monitoring
Log Indicators:
- Unusual SQL error messages in application logs
- Multiple failed login attempts with SQL syntax
- Long or unusual query strings in access logs
Network Indicators:
- HTTP requests containing SQL keywords (SELECT, UNION, DROP, etc.)
- Unusual database connection patterns
SIEM Query:
source="web_logs" AND ("SELECT" OR "UNION" OR "DROP TABLE") AND status="200"