CVE-2023-52946
📋 TL;DR
A buffer overflow vulnerability in Synology Drive Client's vss service allows remote attackers to crash the client by sending specially crafted data. This affects all users running Synology Drive Client versions before 3.5.0-16084. The vulnerability could potentially lead to denial of service or remote code execution.
💻 Affected Systems
- Synology Drive Client
📦 What is this software?
Drive Client by Synology
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise of the client machine.
Likely Case
Client crash and denial of service, potentially disrupting file synchronization services.
If Mitigated
Limited to client crash if exploit attempts are blocked by network controls.
🎯 Exploit Status
The advisory mentions 'unspecified vectors' and remote exploitation is possible, but no public exploit details are available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.5.0-16084 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 3.5.0-16084 or later. 5. Restart the client.
🔧 Temporary Workarounds
Disable vss service
windowsTemporarily disable the vulnerable vss service component
Windows: sc stop "Synology Drive Client VSS Service"
Windows: sc config "Synology Drive Client VSS Service" start= disabled
Network segmentation
allRestrict network access to Synology Drive Client ports
🧯 If You Can't Patch
- Implement network segmentation to restrict access to Synology Drive Client services
- Monitor for client crashes and investigate any suspicious network traffic to the client
🔍 How to Verify
Check if Vulnerable:
Check Synology Drive Client version in Settings > General. If version is below 3.5.0-16084, the system is vulnerable.Check Version:
Windows: "C:\Program Files\Synology\SynologyDrive\bin\synology-drive.exe" --versionVerify Fix Applied:
Confirm version is 3.5.0-16084 or later in Settings > General.📡 Detection & Monitoring
Log Indicators:
- Unexpected Synology Drive Client crashes
- Error logs mentioning vss service failures
Network Indicators:
- Unusual network traffic to Synology Drive Client ports
- Multiple connection attempts to the client service
SIEM Query:
source="synology-drive.log" AND ("crash" OR "vss" OR "buffer")