Executive Summary

Denver SHO-110 IP cameras have a secondary HTTP service running on TCP port 8001 that provides access to a '/snapshot' endpoint without requiring any authentication. Although the main web interface on port 80 requires authentication, this backdoor service allows any remote attacker to directly request image snapshots. By repeatedly accessing this endpoint, an attacker can collect images and reconstruct the camera's video stream, thereby compromising the confidentiality of the monitored area.

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Impact Analysis

This vulnerability allows an attacker to remotely access image snapshots from the camera without any authentication, enabling them to monitor and reconstruct the camera's video stream. This compromises the confidentiality of the environment being monitored, potentially exposing sensitive or private information to unauthorized parties.

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Detection Guidance

You can detect this vulnerability by scanning your network for devices with TCP port 8001 open and then attempting to access the '/snapshot' endpoint without authentication. For example, use a command like 'nmap -p 8001 --open <target-ip>' to find devices with port 8001 open. Then, use a tool like curl to request the snapshot endpoint: 'curl http://<target-ip>:8001/snapshot'. If you receive an image without authentication, the device is vulnerable.

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Mitigation Strategies

Immediate mitigation steps include restricting access to TCP port 8001 on your network by using firewall rules to block or limit access to trusted IPs only. Additionally, disable or restrict the secondary HTTP service on port 8001 if possible. If firmware updates are available from the vendor addressing this issue, apply them promptly.

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