CVE-2024-5463
📋 TL;DR
A classic buffer overflow vulnerability in the login component of Synology camera firmware allows remote attackers to write specific non-sensitive files and cause limited denial-of-service attacks. The affected login service automatically restarts after exploitation. This impacts Synology BC500 and TC500 camera models running firmware versions before 1.1.1-0383.
💻 Affected Systems
- Synology BC500
- Synology TC500
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote attackers could write arbitrary files and cause persistent denial-of-service by repeatedly crashing the login service, potentially disrupting camera functionality.
Likely Case
Limited denial-of-service attacks causing temporary login service disruption with automatic recovery, plus potential file writes containing non-sensitive information.
If Mitigated
Minimal impact with only temporary service interruption and no sensitive data exposure.
🎯 Exploit Status
Attack vectors are unspecified in the advisory, but remote exploitation is possible via the login component.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.1.1-0383 or later
Vendor Advisory: https://www.synology.com/en-global/security/advisory/Synology_SA_24_07
Restart Required: Yes
Instructions:
1. Log into Synology Surveillance Station. 2. Navigate to Surveillance Station > Camera > Camera List. 3. Select affected BC500/TC500 cameras. 4. Click 'Update Firmware' and follow prompts. 5. Restart cameras after update completes.
🔧 Temporary Workarounds
Network Segmentation
allIsolate affected cameras on separate VLAN or network segment to limit attack surface
Access Control Lists
allImplement firewall rules to restrict access to camera management interfaces
🧯 If You Can't Patch
- Implement strict network segmentation to isolate cameras from untrusted networks
- Monitor for repeated login service restarts and implement rate limiting if possible
🔍 How to Verify
Check if Vulnerable:
Check camera firmware version in Surveillance Station under Camera > Camera List > select camera > Firmware VersionCheck Version:
No CLI command available - check via Synology Surveillance Station web interfaceVerify Fix Applied:
Verify firmware version shows 1.1.1-0383 or higher after update📡 Detection & Monitoring
Log Indicators:
- Repeated login service crashes/restarts
- Unusual file write operations in camera logs
- Failed login attempts with oversized input
Network Indicators:
- Unusual traffic patterns to camera login ports
- Repeated connection attempts to camera management interface
SIEM Query:
source="camera_logs" AND (event="service_restart" OR event="login_failure") | stats count by src_ip, camera_id