CVE-2023-52948
📋 TL;DR
This vulnerability allows local users on systems running Synology Active Backup for Business Agent to access unencrypted user credentials stored in settings. It affects all users of Synology Active Backup for Business Agent versions before 2.7.0-3221.
💻 Affected Systems
- Synology Active Backup for Business Agent
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Local attackers gain administrative credentials, potentially compromising the entire backup system and accessing sensitive backup data.
Likely Case
Malicious local users or malware with local access steal credentials to access backup data or pivot to other systems.
If Mitigated
With proper access controls, only authorized administrators can access the system, limiting exposure.
🎯 Exploit Status
Exploitation requires local access to the system where the agent is installed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.7.0-3221
Vendor Advisory: https://www.synology.com/en-global/security/advisory/Synology_SA_24_11
Restart Required: Yes
Instructions:
1. Open Synology Active Backup for Business console. 2. Navigate to Agent Management. 3. Select affected agents. 4. Click Update Agent. 5. Restart the agent service after update.
🔧 Temporary Workarounds
Restrict Local Access
allLimit local user access to systems running the vulnerable agent.
🧯 If You Can't Patch
- Implement strict access controls to limit who has local access to systems running the agent.
- Monitor for unauthorized access attempts to agent configuration files and settings.
🔍 How to Verify
Check if Vulnerable:
Check the agent version in Synology Active Backup for Business console under Agent Management.Check Version:
On Windows: Check program version in Control Panel. On Linux: Check package version with appropriate package manager.Verify Fix Applied:
Verify agent version is 2.7.0-3221 or later in the management console.📡 Detection & Monitoring
Log Indicators:
- Unauthorized access to agent configuration files
- Multiple failed authentication attempts to backup systems
Network Indicators:
- Unusual backup access patterns from unexpected IPs
SIEM Query:
Search for events related to Synology Active Backup Agent configuration file access by non-admin users.