CVE-2023-41623
📋 TL;DR
Emlog Pro version 2.1.14 contains a SQL injection vulnerability in the uid parameter at /admin/media.php. This allows attackers to execute arbitrary SQL commands on the database. Only administrators who can access the admin interface are directly affected, but successful exploitation could lead to broader system compromise.
💻 Affected Systems
- Emlog Pro
📦 What is this software?
Emlog by Emlog
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data theft, privilege escalation, remote code execution, or complete system takeover.
Likely Case
Unauthorized data access, modification, or deletion from the database, potentially including user credentials and sensitive content.
If Mitigated
Limited impact with proper input validation, parameterized queries, and database permissions restricting damage to non-critical data.
🎯 Exploit Status
SQL injection via uid parameter is well-understood attack vector. Public proof-of-concept exists in GitHub repository.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
1. Check Emlog website for security updates. 2. If patch available, download and apply according to vendor instructions. 3. Verify fix by testing the vulnerable endpoint.
🔧 Temporary Workarounds
Input Validation Filter
allAdd input validation to sanitize uid parameter before processing
Modify /admin/media.php to validate uid parameter as integer using is_numeric() or similar function
WAF Rule
allImplement web application firewall rules to block SQL injection patterns
Add WAF rule to detect and block SQL injection attempts on uid parameter
🧯 If You Can't Patch
- Restrict access to /admin/media.php endpoint using IP whitelisting or authentication requirements
- Implement database-level protections: use least privilege accounts, enable query logging, and regular backups
🔍 How to Verify
Check if Vulnerable:
Test /admin/media.php endpoint with SQL injection payloads in uid parameter (e.g., uid=1' OR '1'='1)Check Version:
Check Emlog version in admin dashboard or configuration filesVerify Fix Applied:
Test the same SQL injection payloads after applying fixes to confirm they are blocked or sanitized📡 Detection & Monitoring
Log Indicators:
- Unusual SQL queries in database logs
- Multiple failed login attempts followed by admin access
- Suspicious patterns in uid parameter values
Network Indicators:
- HTTP requests to /admin/media.php with SQL keywords in parameters
- Unusual database connection patterns from web server
SIEM Query:
source="web_logs" AND uri="/admin/media.php" AND (param="uid" AND value MATCH "'|OR|UNION|SELECT")