CVE-2025-56801
📋 TL;DR
The Reolink Desktop Application uses predictable initialization vectors in its AES-CFB encryption, potentially allowing attackers with local access to decrypt sensitive configuration data. This affects users of the vulnerable version who have the application installed on their systems. The vendor disputes the hardcoded nature, claiming IVs are randomly generated per installation.
💻 Affected Systems
- Reolink Desktop Application
📦 What is this software?
Reolink by Reolink
⚠️ Risk & Real-World Impact
Worst Case
Attackers decrypt stored credentials, API keys, or other sensitive configuration data, leading to unauthorized access to Reolink camera systems or other integrated services.
Likely Case
Local attackers extract and decrypt configuration files to gain insights into system setup or potentially recover stored credentials.
If Mitigated
With proper access controls, only authorized users can access the application environment, limiting exposure to trusted personnel.
🎯 Exploit Status
Exploitation requires access to encrypted configuration files and understanding of the AES-CFB implementation; proof-of-concept code is available in the GitHub reference.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: UNKNOWN
Vendor Advisory: NONE
Restart Required: No
Instructions:
Check for updates from Reolink; if a patched version is released, upgrade to it. Currently, no official fix is documented.
🔧 Temporary Workarounds
Restrict Local Access
allLimit physical and logical access to systems running the vulnerable application to trusted users only.
Monitor Configuration Files
allImplement file integrity monitoring on Reolink configuration files to detect unauthorized access attempts.
🧯 If You Can't Patch
- Uninstall the vulnerable version if not required.
- Isolate the application on a dedicated system with strict access controls.
🔍 How to Verify
Check if Vulnerable:
Check the application version in settings or via 'About' menu; if version is 8.18.12, it is vulnerable.Check Version:
Check within the Reolink Desktop Application UI under Help > About or similar menu.Verify Fix Applied:
Upgrade to a version later than 8.18.12 and verify the IV generation uses cryptographically secure random values.📡 Detection & Monitoring
Log Indicators:
- Unusual access patterns to Reolink configuration files
- Failed decryption attempts in application logs
Network Indicators:
- N/A - This is a local vulnerability not involving network exploitation
SIEM Query:
Search for file access events on Reolink configuration paths (e.g., on Windows: %APPDATA%\Reolink\config files)