CVE-2019-25236 in Hybrid DVR WH-H4
Summary
by MITRE • 12/24/2025
iSeeQ Hybrid DVR WH-H4 1.03R contains an unauthenticated vulnerability in the get_jpeg script that allows unauthorized access to live video streams. Attackers can retrieve video snapshots from specific camera channels by sending requests to the /cgi-bin/get_jpeg endpoint without authentication.
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Analysis
by VulDB Data Team • 12/25/2025
The vulnerability identified as CVE-2019-25236 affects the iSeeQ Hybrid DVR WH-H4 version 1.03R, representing a critical security flaw in video surveillance infrastructure that exposes live video feeds to unauthorized access. This issue stems from insufficient authentication mechanisms within the device's web interface, specifically targeting the get_jpeg script that handles video snapshot requests. The vulnerability allows attackers to bypass authentication requirements and directly access live video streams from specific camera channels through a simple HTTP request to the /cgi-bin/get_jpeg endpoint.
The technical implementation of this vulnerability resides in the web server component of the DVR system where the get_jpeg script fails to validate user credentials or session tokens before serving video content. This design flaw creates an unauthenticated access vector that operates at the application layer, making it particularly dangerous as it requires no specialized tools or advanced techniques to exploit. The vulnerability directly maps to CWE-287 which describes improper authentication scenarios in software systems, and aligns with ATT&CK technique T1046 for network service scanning and T1071 for application layer protocols. The affected system operates using standard HTTP protocols without implementing proper access controls, allowing any network-connected attacker to retrieve video frames from configured camera channels.
The operational impact of this vulnerability extends beyond simple privacy concerns to encompass significant security risks for organizations relying on these surveillance systems. Attackers can capture real-time video snapshots from specific camera channels without requiring valid credentials, potentially exposing sensitive locations, personnel movements, or confidential activities occurring within the monitored environment. This unauthenticated access creates a persistent threat vector that remains active as long as the device remains connected to the network and accessible to external parties. The vulnerability is particularly concerning in enterprise environments where surveillance systems are often deployed without proper network segmentation, allowing attackers to leverage this weakness across multiple camera channels simultaneously.
Mitigation strategies for this vulnerability should focus on immediate network-level protections combined with firmware updates where available. Organizations should implement strict network access controls through firewalls and access control lists to restrict access to the DVR device's web interface and CGI endpoints. The recommended approach includes blocking external access to ports 80 and 443 on the DVR device, implementing network segmentation to isolate surveillance equipment, and ensuring that only authorized personnel have access to the device management interfaces. Additionally, administrators should consider disabling unnecessary services and features, implementing strong authentication mechanisms, and regularly updating firmware versions to address known security vulnerabilities. Security monitoring should be enhanced to detect unauthorized access attempts to the get_jpeg endpoint, and network traffic analysis should be employed to identify suspicious patterns of video frame requests. The vulnerability demonstrates the critical importance of implementing proper authentication controls at all levels of network infrastructure, particularly in security-critical applications such as video surveillance systems.