CVE-2018-18527
📋 TL;DR
CVE-2018-18527 is a critical SQL injection vulnerability in OwnTicket that allows attackers to execute arbitrary SQL commands via the showTicketId or editTicketStatusId parameters. This affects all OwnTicket installations running the vulnerable 2018-05-23 version. Attackers can potentially access, modify, or delete database contents.
💻 Affected Systems
- OwnTicket
📦 What is this software?
Ownticket by Owndms
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data theft, privilege escalation, authentication bypass, and potential remote code execution through database functions.
Likely Case
Unauthorized access to ticket data, user information, and potential administrative access to the OwnTicket system.
If Mitigated
Limited impact with proper input validation and parameterized queries preventing SQL injection.
🎯 Exploit Status
Exploit code is publicly available on Exploit-DB, making this easily exploitable by attackers with minimal technical skill.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Later versions after 2018-05-23
Vendor Advisory: Not available - OwnTicket appears to be abandoned/unsupported
Restart Required: No
Instructions:
1. Upgrade to a newer version of OwnTicket if available. 2. If no newer version exists, implement parameterized queries and input validation. 3. Apply web application firewall rules to block SQL injection attempts.
🔧 Temporary Workarounds
Web Application Firewall (WAF) Rules
allImplement WAF rules to detect and block SQL injection patterns in showTicketId and editTicketStatusId parameters.
# Example ModSecurity rule: SecRule ARGS:showTicketId "@detectSQLi" "id:1001,phase:2,deny,status:403"
# Example ModSecurity rule: SecRule ARGS:editTicketStatusId "@detectSQLi" "id:1002,phase:2,deny,status:403"
Input Validation Filter
allImplement server-side validation to ensure showTicketId and editTicketStatusId parameters contain only expected values (numeric IDs).
# PHP example: if (!is_numeric($_GET['showTicketId'])) { die('Invalid parameter'); }
# PHP example: if (!is_numeric($_GET['editTicketStatusId'])) { die('Invalid parameter'); }
🧯 If You Can't Patch
- Implement strict input validation to only accept numeric values for showTicketId and editTicketStatusId parameters
- Deploy a web application firewall with SQL injection detection rules
🔍 How to Verify
Check if Vulnerable:
Test by attempting SQL injection in showTicketId or editTicketStatusId parameters (e.g., append ' OR '1'='1 to parameter values).Check Version:
Check OwnTicket version in application files or admin interface; look for version 2018-05-23.Verify Fix Applied:
Attempt SQL injection tests after implementing fixes; successful attacks should be blocked or return error messages.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL errors in application logs
- Multiple failed parameter validation attempts
- Requests with SQL keywords in showTicketId or editTicketStatusId parameters
Network Indicators:
- HTTP requests containing SQL injection payloads in URL parameters
- Unusual database query patterns from web server
SIEM Query:
web.url:*showTicketId* AND (web.url:*OR* OR web.url:*UNION* OR web.url:*SELECT* OR web.url:*INSERT* OR web.url:*UPDATE* OR web.url:*DELETE*)