CVE-2024-53286
📋 TL;DR
This CVE describes an OS command injection vulnerability in Synology Router Manager's DDNS functionality. Authenticated administrators can execute arbitrary commands on the router, potentially compromising the entire network. Only Synology routers running SRM versions before 1.3.1-9346-11 are affected.
💻 Affected Systems
- Synology Router Manager (SRM)
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete router compromise leading to network interception, credential theft, lateral movement to connected devices, and persistent backdoor installation.
Likely Case
Router configuration manipulation, DNS hijacking, network traffic monitoring, and potential access to connected devices.
If Mitigated
Limited impact if proper network segmentation exists and router management interfaces are isolated from untrusted networks.
🎯 Exploit Status
Exploitation requires administrator access. The vulnerability is in DDNS record handling, suggesting manipulation of DDNS configuration fields.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: SRM 1.3.1-9346-11 and later
Vendor Advisory: https://www.synology.com/en-global/security/advisory/Synology_SA_24_16
Restart Required: Yes
Instructions:
1. Log into Synology Router Manager web interface. 2. Navigate to Control Panel > Update & Restore. 3. Check for updates and install SRM 1.3.1-9346-11 or later. 4. Reboot the router after installation completes.
🔧 Temporary Workarounds
Disable DDNS functionality
allTemporarily disable Dynamic DNS if not required, removing the attack surface.
Restrict administrative access
allLimit router management interface access to specific trusted IP addresses only.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate the router from critical internal networks
- Enable comprehensive logging and monitoring for suspicious administrative activities
🔍 How to Verify
Check if Vulnerable:
Check SRM version in Control Panel > Info Center > General. If version is below 1.3.1-9346-11, the system is vulnerable.Check Version:
ssh admin@router_ip 'cat /etc.defaults/VERSION'Verify Fix Applied:
Verify SRM version is 1.3.1-9346-11 or higher after applying the update.📡 Detection & Monitoring
Log Indicators:
- Unusual DDNS configuration changes
- Suspicious command execution in system logs
- Multiple failed authentication attempts followed by successful login
Network Indicators:
- Unexpected outbound connections from router
- DNS queries to suspicious domains
- Unusual traffic patterns from router management interface
SIEM Query:
source="synology-router" AND (event_type="config_change" AND config_item="ddns" OR process_execution="*sh*" OR command="*cmd*")