CVE-2024-53280
📋 TL;DR
This is a stored cross-site scripting (XSS) vulnerability in Synology Router Manager's network center policy route functionality. It allows authenticated administrators to inject malicious scripts that can read/write non-sensitive files and cause limited denial-of-service. Only users with administrator privileges can exploit this vulnerability.
💻 Affected Systems
- Synology Router Manager (SRM)
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
An authenticated malicious administrator could write arbitrary files, potentially leading to system instability or limited DoS, though file access is restricted to non-sensitive information.
Likely Case
Privilege escalation within the web interface, session hijacking of other administrators, or limited DoS through file manipulation.
If Mitigated
With proper access controls limiting administrator accounts to trusted personnel only, impact is minimal as exploitation requires high privileges.
🎯 Exploit Status
Exploitation requires administrator credentials. No public exploit code has been disclosed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: SRM 1.3.1-9346-10 and later
Vendor Advisory: https://www.synology.com/en-global/security/advisory/Synology_SA_24_09
Restart Required: Yes
Instructions:
1. Log into SRM web interface as administrator. 2. Navigate to Control Panel > Update & Restore. 3. Check for updates and install SRM 1.3.1-9346-10 or later. 4. Reboot the router after installation completes.
🔧 Temporary Workarounds
Restrict Administrator Access
allLimit administrator accounts to only essential, trusted personnel and implement strong authentication.
Network Segmentation
allPlace Synology router management interface on isolated VLAN with restricted access.
🧯 If You Can't Patch
- Implement strict access controls for administrator accounts and monitor for suspicious activity.
- Consider disabling the network center policy route functionality if not required for operations.
🔍 How to Verify
Check if Vulnerable:
Check SRM version in Control Panel > Info Center > DSM/SRM Version. If version is below 1.3.1-9346-10, the system is vulnerable.Check Version:
ssh admin@router_ip 'cat /etc.defaults/VERSION' or check web interfaceVerify Fix Applied:
After updating, verify the version shows 1.3.1-9346-10 or higher in Control Panel > Info Center.📡 Detection & Monitoring
Log Indicators:
- Unusual administrator login patterns
- Multiple failed login attempts followed by successful login
- Web interface logs showing script injection in policy route parameters
Network Indicators:
- Unusual HTTP POST requests to network center policy route endpoints
- Suspicious JavaScript payloads in web traffic
SIEM Query:
source="srm_logs" AND (event="admin_login" OR event="policy_route_update") AND (user_agent CONTAINS "script" OR params CONTAINS "<script>")