CVE-2022-49038
📋 TL;DR
This vulnerability allows local users to execute arbitrary code on systems running vulnerable versions of Synology Drive Client. Attackers with local access can exploit untrusted functionality inclusion in the OpenSSL DLL component to gain elevated privileges. Only Synology Drive Client users on Windows or macOS are affected.
💻 Affected Systems
- Synology Drive Client
📦 What is this software?
Drive Client by Synology
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining administrative privileges, installing persistent malware, accessing sensitive data, and pivoting to other systems.
Likely Case
Local privilege escalation allowing attackers to bypass security controls, install additional tools, and access restricted files or network resources.
If Mitigated
Limited impact due to proper access controls, network segmentation, and monitoring preventing lateral movement even if initial exploitation occurs.
🎯 Exploit Status
Requires local access to the system. Attack vectors likely involve DLL hijacking or similar local file manipulation techniques.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.3.0-15082 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 3.3.0-15082 or later. 5. Restart the application or system if prompted.
🔧 Temporary Workarounds
Restrict local user access
allLimit local user accounts to only trusted personnel and implement least privilege principles.
Application control policies
allImplement application whitelisting to prevent unauthorized execution of binaries.
🧯 If You Can't Patch
- Implement strict access controls to limit local user privileges
- Deploy endpoint detection and response (EDR) solutions to monitor for suspicious DLL loading behavior
🔍 How to Verify
Check if Vulnerable:
Check Synology Drive Client version in application settings or About dialog. If version is below 3.3.0-15082, system is vulnerable.Check Version:
On Windows: Check 'About' in Synology Drive Client. On macOS: Open Synology Drive Client > About.Verify Fix Applied:
Confirm version is 3.3.0-15082 or higher in application settings. Verify no unusual DLL loading events in system logs.📡 Detection & Monitoring
Log Indicators:
- Unusual DLL loading events from Synology Drive Client process
- Process creation with unusual parent-child relationships involving Synology Drive Client
Network Indicators:
- Unexpected outbound connections from Synology Drive Client process after local user activity
SIEM Query:
process_name:"SynologyDrive.exe" AND (event_type:"dll_load" OR parent_process:unusual)