CVE-2025-57705
📋 TL;DR
This CVE describes a resource allocation vulnerability in QNAP operating systems where an authenticated attacker with administrator privileges can exhaust system resources, causing denial of service for other processes. The vulnerability affects multiple QNAP OS versions and requires administrator credentials to exploit. Organizations using affected QNAP systems are at risk if they haven't applied the vendor patches.
💻 Affected Systems
- QNAP QTS
- QNAP QuTS hero
⚠️ Risk & Real-World Impact
Worst Case
Complete system unavailability due to resource exhaustion, affecting all services and applications on the QNAP device
Likely Case
Degraded performance or temporary service interruptions for specific applications sharing the exhausted resource
If Mitigated
Minimal impact with proper access controls preventing unauthorized administrator access
🎯 Exploit Status
Exploitation requires administrator credentials; vulnerability is in resource allocation logic
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: QTS 5.2.7.3256 build 20250913 or later, QuTS hero h5.2.7.3256 build 20250913 or later, QuTS hero h5.3.1.3250 build 20250912 or later
Vendor Advisory: https://www.qnap.com/en/security-advisory/qsa-25-50
Restart Required: Yes
Instructions:
1. Log into QNAP web interface as administrator. 2. Navigate to Control Panel > System > Firmware Update. 3. Check for updates and apply the latest firmware version. 4. Reboot the device after update completes.
🔧 Temporary Workarounds
Restrict Administrator Access
allLimit administrator account access to only trusted personnel and implement strong authentication
Network Segmentation
allIsolate QNAP devices from untrusted networks and implement strict firewall rules
🧯 If You Can't Patch
- Implement strict access controls and monitor administrator account activity
- Deploy network monitoring to detect resource exhaustion patterns
🔍 How to Verify
Check if Vulnerable:
Check current firmware version in QNAP web interface: Control Panel > System > Firmware UpdateCheck Version:
ssh admin@qnap-ip 'cat /etc/version' or check via web interfaceVerify Fix Applied:
Verify firmware version matches or exceeds patched versions listed in the advisory📡 Detection & Monitoring
Log Indicators:
- Unusual resource allocation patterns
- Multiple failed authentication attempts followed by successful admin login
- System logs showing resource exhaustion warnings
Network Indicators:
- Unusual network traffic patterns from QNAP device
- Multiple connection attempts to administrative interfaces
SIEM Query:
source="qnap" AND (event_type="resource_exhaustion" OR user="admin" AND action="allocate")