CVE-2025-54153
📋 TL;DR
An SQL injection vulnerability in Qsync Central allows authenticated remote attackers to execute arbitrary SQL commands. This could lead to unauthorized data access, modification, or code execution. Organizations using vulnerable versions of Qsync Central are affected.
💻 Affected Systems
- Qsync Central
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing data theft, ransomware deployment, or persistent backdoor installation
Likely Case
Data exfiltration, privilege escalation, or service disruption
If Mitigated
Limited impact due to network segmentation and minimal user privileges
🎯 Exploit Status
Exploitation requires valid user credentials but SQL injection techniques are widely known
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Qsync Central 5.0.0.2 (2025/07/31) and later
Vendor Advisory: https://www.qnap.com/en/security-advisory/qsa-25-35
Restart Required: Yes
Instructions:
1. Log into QNAP QTS admin interface
2. Navigate to App Center
3. Check for updates to Qsync Central
4. Update to version 5.0.0.2 or later
5. Restart the Qsync Central service
🔧 Temporary Workarounds
Network Segmentation
allRestrict access to Qsync Central to trusted networks only
Configure firewall rules to limit Qsync Central access to specific IP ranges
User Account Review
allReview and remove unnecessary user accounts, enforce strong passwords
Review Qsync Central user accounts and remove unused accounts
🧯 If You Can't Patch
- Implement web application firewall (WAF) with SQL injection protection rules
- Disable Qsync Central service if not essential for operations
🔍 How to Verify
Check if Vulnerable:
Check Qsync Central version in QNAP App Center or via SSH: cat /etc/config/uLinux.conf | grep qsyncCheck Version:
cat /etc/config/uLinux.conf | grep -i qsyncVerify Fix Applied:
Verify version is 5.0.0.2 or later in App Center or via command line📡 Detection & Monitoring
Log Indicators:
- Unusual SQL queries in application logs
- Multiple failed login attempts followed by successful login
Network Indicators:
- SQL syntax in HTTP POST parameters to Qsync Central endpoints
- Unusual outbound database connections
SIEM Query:
source="qsync_logs" AND (sql OR union OR select OR insert OR delete OR update OR drop) AND NOT expected_query_pattern