CVE-2021-3854
📋 TL;DR
This SQL injection vulnerability in Glox Technology Useroam Hotspot allows attackers to execute arbitrary SQL commands through unvalidated user input. It affects all Useroam Hotspot installations before version 5.1.0.15, potentially compromising hotspot authentication and management systems.
💻 Affected Systems
- Glox Technology Useroam Hotspot
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing data theft, authentication bypass, remote code execution, and full administrative control of the hotspot system.
Likely Case
Unauthorized access to user databases, credential theft, manipulation of hotspot authentication, and potential lateral movement to connected systems.
If Mitigated
Limited impact with proper input validation, parameterized queries, and network segmentation preventing database access.
🎯 Exploit Status
SQL injection vulnerabilities are commonly exploited with automated tools. The high CVSS score suggests straightforward exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 5.1.0.15 or later
Vendor Advisory: https://www.usom.gov.tr/bildirim/tr-23-0120
Restart Required: Yes
Instructions:
1. Download Useroam Hotspot version 5.1.0.15 or later from official vendor sources. 2. Backup current configuration and database. 3. Install the updated version following vendor documentation. 4. Restart the hotspot service. 5. Verify functionality and monitor for issues.
🔧 Temporary Workarounds
Web Application Firewall (WAF)
allDeploy a WAF with SQL injection protection rules to block malicious requests
Input Validation Filter
allImplement custom input validation to sanitize SQL special characters
🧯 If You Can't Patch
- Isolate the hotspot system from critical networks using firewall rules
- Implement strict network segmentation and monitor all database access attempts
🔍 How to Verify
Check if Vulnerable:
Check Useroam Hotspot version in administration interface or configuration files. If version is below 5.1.0.15, system is vulnerable.Check Version:
Check web interface at /admin or examine configuration files for version informationVerify Fix Applied:
Confirm version is 5.1.0.15 or higher in administration interface and test SQL injection attempts are blocked.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL error messages in application logs
- Multiple failed login attempts with SQL syntax
- Unexpected database queries
Network Indicators:
- HTTP requests containing SQL keywords (SELECT, UNION, DROP, etc.)
- Unusual database connection patterns
SIEM Query:
source="useroam_logs" AND ("sql" OR "syntax" OR "union" OR "select" OR "drop")