CVE-2024-53284
📋 TL;DR
This is a stored cross-site scripting (XSS) vulnerability in Synology Router Manager's WiFi Connect Setting functionality. It allows authenticated administrators to inject malicious scripts that can read/write certain non-sensitive files and cause limited denial-of-service. Only users with administrator privileges on affected Synology routers are impacted.
💻 Affected Systems
- Synology Router Manager (SRM)
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
An authenticated malicious administrator could execute arbitrary JavaScript in the router's web interface, potentially accessing router configuration files, modifying settings, or disrupting router management functions.
Likely Case
An administrator with malicious intent could inject scripts to read router logs or configuration files, or cause temporary unavailability of specific management functions.
If Mitigated
With proper access controls limiting administrative privileges to trusted users only, the impact is minimal as it requires authenticated admin access.
🎯 Exploit Status
Exploitation requires authenticated administrator access. The vulnerability is in the web interface's input validation.
🛠️ 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 Synology Router Manager web interface. 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 Administrative Access
allLimit administrative access to only trusted, necessary personnel. Implement strong authentication and consider network segmentation for management interfaces.
🧯 If You Can't Patch
- Implement strict access controls to limit administrative privileges to essential personnel only
- Monitor administrative user activity and implement web application firewall rules to detect XSS attempts
🔍 How to Verify
Check if Vulnerable:
Check SRM version in Control Panel > Info Center > DSM/SRM Version. If version is earlier than 1.3.1-9346-10, the system is vulnerable.Check Version:
ssh admin@router-ip 'cat /etc.defaults/VERSION'Verify Fix Applied:
After updating, verify the SRM version shows 1.3.1-9346-10 or later in Control Panel > Info Center.📡 Detection & Monitoring
Log Indicators:
- Unusual administrative login patterns
- Multiple failed login attempts followed by successful admin login
- Web interface access logs showing script-like payloads in WiFi configuration parameters
Network Indicators:
- Unusual HTTP POST requests to WiFi configuration endpoints containing script tags or JavaScript code
SIEM Query:
source="synology-router" AND (http_method="POST" AND uri="*wifi*" AND (body="*script*" OR body="*javascript*" OR body="*onload*" OR body="*onerror*"))