CVE-2022-49040
📋 TL;DR
A buffer overflow vulnerability in Synology Drive Client allows local users with administrator privileges to crash the application. This affects users running Synology Drive Client versions before 3.4.0-15721 on their systems.
💻 Affected Systems
- Synology Drive Client
📦 What is this software?
Drive Client by Synology
⚠️ Risk & Real-World Impact
Worst Case
Local privilege escalation leading to full system compromise if combined with other vulnerabilities
Likely Case
Denial of service through client application crash
If Mitigated
Limited to client disruption with no data loss or remote access
🎯 Exploit Status
Requires local administrator access and specific knowledge of exploitation vectors
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.4.0-15721 and later
Vendor Advisory: https://www.synology.com/en-global/security/advisory/Synology_SA_24_10
Restart Required: Yes
Instructions:
1. Open Synology Drive Client. 2. Go to Settings > General. 3. Click 'Check for updates'. 4. Install version 3.4.0-15721 or later. 5. Restart the application.
🔧 Temporary Workarounds
Restrict local administrator access
allLimit the number of users with local administrator privileges on systems running Synology Drive Client
🧯 If You Can't Patch
- Monitor for unexpected Synology Drive Client crashes
- Implement application whitelisting to prevent unauthorized process execution
🔍 How to Verify
Check if Vulnerable:
Check Synology Drive Client version in application settingsCheck Version:
On Windows: Check 'About' in Synology Drive Client settings. On macOS/Linux: Check version in application info or via package manager.Verify Fix Applied:
Confirm version is 3.4.0-15721 or higher in application settings📡 Detection & Monitoring
Log Indicators:
- Unexpected Synology Drive Client crashes
- Application error logs mentioning buffer overflow
Network Indicators:
- None - local vulnerability only
SIEM Query:
EventID 1000 (Application Error) with 'Synology Drive Client' in Windows Event Logs