CVE-2023-6096
📋 TL;DR
This vulnerability involves broken firmware encryption in Hanwha Vision DVR/NVR devices, allowing attackers to decrypt firmware and potentially extract sensitive information or modify device behavior. It affects users of vulnerable Hanwha Vision DVR/NVR systems. The manufacturer has released patches to address the flawed encryption logic.
💻 Affected Systems
- Hanwha Vision DVR/NVR devices
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Attackers could decrypt firmware to discover additional vulnerabilities, extract hardcoded credentials or cryptographic keys, create custom malicious firmware, and gain persistent access to compromised devices.
Likely Case
Attackers decrypt firmware to analyze device internals, extract sensitive configuration data, and potentially prepare for further attacks against the device or connected systems.
If Mitigated
With proper network segmentation and access controls, the impact is limited to device compromise without lateral movement to other systems.
🎯 Exploit Status
Exploitation requires understanding of firmware encryption/decryption processes and access to firmware images.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to manufacturer firmware updates
Vendor Advisory: https://www.hanwhavision.com/wp-content/uploads/2024/04/NVR-DVR-Vulnerability-Report-CVE-2023-6095-6096.pdf
Restart Required: Yes
Instructions:
1. Download latest firmware from Hanwha Vision support portal. 2. Backup device configuration. 3. Upload firmware via web interface. 4. Apply update and restart device.
🔧 Temporary Workarounds
Network Segmentation
allIsolate DVR/NVR devices from internet and restrict internal network access
Access Control Lists
allImplement strict firewall rules to limit device communication
🧯 If You Can't Patch
- Segment devices on isolated network VLAN
- Implement strict inbound/outbound firewall rules for device IPs
🔍 How to Verify
Check if Vulnerable:
Check firmware version against manufacturer's patched versions listCheck Version:
Check via device web interface: System > Information > Firmware VersionVerify Fix Applied:
Verify firmware version matches or exceeds patched version from advisory📡 Detection & Monitoring
Log Indicators:
- Unusual firmware update attempts
- Unauthorized configuration changes
- Multiple failed login attempts
Network Indicators:
- Unexpected firmware download traffic
- Unusual outbound connections from DVR/NVR
SIEM Query:
source="dvr_logs" AND (event="firmware_update" OR event="config_change")