CVE-2024-53693
📋 TL;DR
This CRLF injection vulnerability in QNAP operating systems allows attackers with user access to manipulate application data by injecting carriage return and line feed sequences. It affects QTS and QuTS hero systems running vulnerable versions. Remote exploitation could lead to data modification attacks.
💻 Affected Systems
- QNAP QTS
- QNAP QuTS hero
📦 What is this software?
Qts by Qnap
Qts by Qnap
Qts by Qnap
Qts by Qnap
Qts by Qnap
Qts by Qnap
Qts by Qnap
Qts by Qnap
Qts by Qnap
⚠️ Risk & Real-World Impact
Worst Case
Remote authenticated attacker could modify critical application data, potentially leading to data corruption, privilege escalation, or service disruption.
Likely Case
Authenticated attacker modifies application data to disrupt services or manipulate application behavior.
If Mitigated
With proper access controls and network segmentation, impact limited to specific applications or data sets.
🎯 Exploit Status
Requires authenticated access and specific knowledge of vulnerable endpoints.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: QTS 5.2.3.3006 build 20250108 or later, QuTS hero h5.2.3.3006 build 20250108 or later
Vendor Advisory: https://www.qnap.com/en/security-advisory/qsa-24-54
Restart Required: No
Instructions:
1. Log into QNAP web interface. 2. Go to Control Panel > System > Firmware Update. 3. Check for updates and install latest version. 4. Verify version matches patched release.
🔧 Temporary Workarounds
Restrict User Access
allLimit user accounts to only necessary personnel and implement strong authentication.
Network Segmentation
allIsolate QNAP devices from internet and restrict internal network access.
🧯 If You Can't Patch
- Implement strict access controls and monitor for suspicious user activity.
- Isolate affected systems in network segments with limited access.
🔍 How to Verify
Check if Vulnerable:
Check QTS/QuTS hero version in Control Panel > System > Firmware Update.Check Version:
ssh admin@qnap-ip 'cat /etc/config/uLinux.conf | grep version'Verify Fix Applied:
Verify version is QTS 5.2.3.3006 build 20250108 or later, or QuTS hero h5.2.3.3006 build 20250108 or later.📡 Detection & Monitoring
Log Indicators:
- Unusual user activity patterns
- Multiple failed authentication attempts followed by successful login
- Unexpected application data modifications
Network Indicators:
- Unusual HTTP request patterns with CRLF sequences
- Traffic to QNAP management interfaces from unexpected sources
SIEM Query:
source="qnap_logs" AND ("CRLF" OR "%0D%0A" OR "\r\n")