CVE-2018-6575
📋 TL;DR
This is a critical SQL injection vulnerability in JEXTN Classified 1.0.0 component for Joomla! that allows attackers to execute arbitrary SQL commands via the 'view=boutique&sid=' parameter. Attackers can potentially access, modify, or delete database content. All Joomla! installations using the vulnerable JEXTN Classified component version are affected.
💻 Affected Systems
- JEXTN Classified component for Joomla!
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data theft, data destruction, authentication bypass, and potential remote code execution through database functions.
Likely Case
Unauthorized data access, privilege escalation, and potential website defacement through database manipulation.
If Mitigated
Limited impact with proper input validation and parameterized queries preventing SQL injection.
🎯 Exploit Status
Public exploit code is available and exploitation requires minimal technical skill.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Update to latest JEXTN Classified version or remove component
Vendor Advisory: https://www.exploit-db.com/exploits/43957
Restart Required: No
Instructions:
1. Log into Joomla! admin panel. 2. Navigate to Extensions > Manage. 3. Search for JEXTN Classified. 4. Update to latest version or uninstall if not needed. 5. If updating isn't possible, remove the component entirely.
🔧 Temporary Workarounds
WAF Rule Implementation
allImplement web application firewall rules to block SQL injection patterns in the 'sid' parameter
# Example ModSecurity rule: SecRule ARGS:sid "@detectSQLi" "id:1001,phase:2,deny,status:403"
Input Validation Filter
allAdd input validation to sanitize the 'sid' parameter before processing
# PHP example: $sid = filter_var($_GET['sid'], FILTER_SANITIZE_NUMBER_INT);
🧯 If You Can't Patch
- Disable or remove the JEXTN Classified component from Joomla! installation
- Implement strict network segmentation and limit access to affected systems
🔍 How to Verify
Check if Vulnerable:
Check if JEXTN Classified component version 1.0.0 is installed via Joomla! admin panel under Extensions > ManageCheck Version:
# Check Joomla! extensions: SELECT * FROM #__extensions WHERE element LIKE '%classified%';Verify Fix Applied:
Verify component is updated to latest version or removed, then test with SQL injection payloads📡 Detection & Monitoring
Log Indicators:
- SQL error messages in web server logs
- Unusual database queries with SQL injection patterns
- Multiple requests with 'view=boutique&sid=' containing SQL syntax
Network Indicators:
- HTTP requests with SQL keywords in 'sid' parameter
- Unusual database connection patterns from web server
SIEM Query:
source="web_logs" AND (url="*view=boutique*" AND (url="*UNION*" OR url="*SELECT*" OR url="*INSERT*" OR url="*DELETE*"))