CVE-2018-5975
📋 TL;DR
This is a critical SQL injection vulnerability in the Smart Shoutbox 3.0.0 component for Joomla! that allows attackers to execute arbitrary SQL commands via the shoutauthor parameter. Any Joomla! site using the vulnerable component is affected, potentially leading to complete database compromise.
💻 Affected Systems
- Smart Shoutbox component for Joomla!
📦 What is this software?
Smart Shoutbox by Thekrotek
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise including data theft, data manipulation, privilege escalation, and potential remote code execution via database functions.
Likely Case
Database information disclosure, authentication bypass, and data manipulation leading to site defacement or user data theft.
If Mitigated
Limited impact with proper input validation and parameterized queries preventing SQL injection.
🎯 Exploit Status
Exploit requires no authentication and is trivial to execute with publicly available proof-of-concept code.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.0.1 or later
Vendor Advisory: https://www.joomla.org/announcements/release-news/
Restart Required: No
Instructions:
1. Update Smart Shoutbox component to version 3.0.1 or later via Joomla! Extension Manager. 2. Verify the update completed successfully. 3. Test the shoutbox functionality.
🔧 Temporary Workarounds
Disable Smart Shoutbox component
allTemporarily disable the vulnerable component until patching is possible
Navigate to Joomla! Extensions > Manage > Disable Smart Shoutbox
Web Application Firewall (WAF) rules
allBlock SQL injection patterns targeting the shoutauthor parameter
Add WAF rule: Block requests containing SQL keywords in shoutauthor parameter
🧯 If You Can't Patch
- Implement strict input validation for shoutauthor parameter
- Deploy web application firewall with SQL injection protection
🔍 How to Verify
Check if Vulnerable:
Check Joomla! Extensions > Manage for Smart Shoutbox version 3.0.0Check Version:
Check Joomla! admin panel: Extensions > Manage > Search for Smart ShoutboxVerify Fix Applied:
Confirm Smart Shoutbox version is 3.0.1 or later in Extensions Manager📡 Detection & Monitoring
Log Indicators:
- Unusual SQL queries in database logs
- Multiple requests to archive URI with SQL keywords in parameters
- Failed login attempts following SQL injection patterns
Network Indicators:
- HTTP requests to archive URI with SQL injection payloads in shoutauthor parameter
- Unusual database connection patterns from web server
SIEM Query:
source="web_logs" AND uri="*archive*" AND param="*shoutauthor*" AND (payload="*UNION*" OR payload="*SELECT*" OR payload="*INSERT*" OR payload="*DELETE*")