CVE-2023-1547
📋 TL;DR
This SQL injection vulnerability in Elra Parkmatik allows attackers to execute arbitrary SQL commands through SOAP parameter tampering. Successful exploitation could lead to command execution on the underlying system. All Parkmatik installations before version 02.01-a51 are affected.
💻 Affected Systems
- Elra Parkmatik
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with remote code execution, data exfiltration, and complete control over the Parkmatik system and potentially the underlying server.
Likely Case
Database compromise leading to data theft, manipulation, or deletion, with potential for command execution depending on database permissions.
If Mitigated
Limited to database information disclosure if proper input validation and least privilege database accounts are used.
🎯 Exploit Status
SQL injection through SOAP parameters suggests straightforward exploitation for attackers with network access.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 02.01-a51
Vendor Advisory: https://www.usom.gov.tr/bildirim/tr-23-0404
Restart Required: Yes
Instructions:
1. Download Parkmatik version 02.01-a51 or later from official vendor sources. 2. Backup current configuration and data. 3. Install the updated version following vendor documentation. 4. Restart the Parkmatik service.
🔧 Temporary Workarounds
Network Segmentation
allRestrict network access to Parkmatik SOAP interface to only trusted IP addresses.
Use firewall rules to limit access to Parkmatik service ports
Web Application Firewall
allDeploy WAF with SQL injection protection rules to filter malicious SOAP requests.
Configure WAF to inspect SOAP traffic and block SQL injection patterns
🧯 If You Can't Patch
- Implement strict input validation on all SOAP parameters to reject SQL special characters
- Run Parkmatik with least privilege database account that has no command execution capabilities
🔍 How to Verify
Check if Vulnerable:
Check Parkmatik version in administration interface or configuration files. If version is earlier than 02.01-a51, system is vulnerable.Check Version:
Check Parkmatik web interface or configuration files for version informationVerify Fix Applied:
Confirm version is 02.01-a51 or later in administration interface and test SOAP interface with SQL injection test payloads (in safe environment).📡 Detection & Monitoring
Log Indicators:
- Unusual SQL error messages in application logs
- Multiple failed SOAP authentication attempts
- SOAP requests with SQL keywords in parameters
Network Indicators:
- Unusual database connection patterns from Parkmatik server
- SOAP requests containing SQL injection patterns
SIEM Query:
source="parkmatik" AND ("sql" OR "select" OR "union" OR "exec") IN request_parameters