CVE-2025-1021
📋 TL;DR
A missing authorization vulnerability in synocopy allows remote attackers to read arbitrary files on Synology DiskStation Manager systems. This affects DSM versions before 7.1.1-42962-8, 7.2.1-69057-7, and 7.2.2-72806-3. Attackers can potentially access sensitive files without proper authentication.
💻 Affected Systems
- Synology DiskStation Manager (DSM)
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise through reading sensitive configuration files, credentials, or SSH keys leading to privilege escalation and lateral movement.
Likely Case
Unauthorized access to sensitive files containing user data, configuration information, or system logs.
If Mitigated
Limited impact with proper network segmentation and access controls preventing external exploitation.
🎯 Exploit Status
Exploitation requires network access to the DSM interface but does not require authentication. The unspecified vectors suggest multiple potential attack paths.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: DSM 7.1.1-42962-8, 7.2.1-69057-7, or 7.2.2-72806-3
Vendor Advisory: https://www.synology.com/en-global/security/advisory/Synology_SA_25_03
Restart Required: Yes
Instructions:
1. Log into DSM web interface as administrator. 2. Go to Control Panel > Update & Restore. 3. Click 'Download' for available DSM updates. 4. Click 'Install' and follow prompts. 5. System will restart automatically after update.
🔧 Temporary Workarounds
Restrict Network Access
allLimit access to DSM web interface and services to trusted networks only
Configure firewall rules to restrict access to DSM ports (default: 5000, 5001)
Disable Unnecessary Services
linuxDisable synocopy service if not required for your use case
Check DSM service configuration and disable synocopy if possible
🧯 If You Can't Patch
- Implement strict network segmentation to isolate DSM systems from untrusted networks
- Enable detailed logging and monitoring for file access attempts through synocopy
🔍 How to Verify
Check if Vulnerable:
Check DSM version in Control Panel > Info Center > DSM versionCheck Version:
ssh admin@nas 'cat /etc.defaults/VERSION' or check web interfaceVerify Fix Applied:
Verify DSM version is 7.1.1-42962-8, 7.2.1-69057-7, or 7.2.2-72806-3 or later📡 Detection & Monitoring
Log Indicators:
- Unusual file access patterns through synocopy
- Multiple failed authentication attempts followed by file reads
Network Indicators:
- Unusual traffic to DSM web interface from unexpected sources
- Patterns of file enumeration requests
SIEM Query:
source="dsm" AND (process="synocopy" OR event="file_access") AND user="unknown"