CVE-2024-39349
📋 TL;DR
A classic buffer overflow vulnerability in the libjansson component of Synology Camera Firmware allows remote attackers to execute arbitrary code on affected devices. This affects Synology BC500 and TC500 camera models running firmware versions before 1.0.7-0298. The vulnerability has a critical CVSS score of 9.8, indicating high severity.
💻 Affected Systems
- Synology BC500
- Synology TC500
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, lateral movement to other network devices, and persistent backdoor installation.
Likely Case
Remote code execution allowing attackers to disable cameras, exfiltrate video feeds, or use devices as footholds for further network attacks.
If Mitigated
Limited impact if devices are isolated in separate VLANs with strict network segmentation and access controls.
🎯 Exploit Status
Buffer overflow vulnerabilities typically have low exploitation complexity once details are known. Remote exploitation is possible via unspecified vectors.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.0.7-0298
Vendor Advisory: https://www.synology.com/en-global/security/advisory/Synology_SA_23_15
Restart Required: Yes
Instructions:
1. Log into Synology Surveillance Station. 2. Navigate to Surveillance Station > Camera > Camera List. 3. Select affected cameras. 4. Click 'Update Firmware'. 5. Apply version 1.0.7-0298 or later. 6. Restart cameras after update.
🔧 Temporary Workarounds
Network Segmentation
allIsolate cameras in separate VLAN with strict firewall rules limiting access to authorized management systems only.
Disable Unnecessary Services
allDisable any camera services not required for operation, particularly those exposed to network.
🧯 If You Can't Patch
- Segment cameras into isolated network zones with strict firewall rules blocking all inbound traffic except from authorized management systems.
- Implement network-based intrusion prevention systems (IPS) with buffer overflow detection rules and monitor for exploitation attempts.
🔍 How to Verify
Check if Vulnerable:
Check camera firmware version in Surveillance Station: Camera List > select camera > Firmware Version.Check Version:
No direct CLI command; check via Synology Surveillance Station web interface.Verify Fix Applied:
Verify firmware version shows 1.0.7-0298 or higher after update.📡 Detection & Monitoring
Log Indicators:
- Unusual network connections to camera services
- Failed firmware update attempts
- Camera service crashes or restarts
Network Indicators:
- Unusual traffic patterns to camera ports
- Buffer overflow exploitation patterns in network traffic
SIEM Query:
source="camera_logs" AND (event="service_crash" OR event="buffer_overflow")