CVE-2017-9316 in IPC-HDW4300S
Summary
by MITRE
Firmware upgrade authentication bypass vulnerability was found in Dahua IPC-HDW4300S and some IP products. The vulnerability was caused by internal Debug function. This particular function was used for problem analysis and performance tuning during product development phase. It allowed the device to receive only specific data (one direction, no transmit) and therefore it was not involved in any instance of collecting user privacy data or allowing remote code execution.
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Analysis
by VulDB Data Team • 12/11/2019
The CVE-2017-9316 vulnerability represents a critical security flaw in Dahua surveillance equipment, specifically affecting models including the IPC-HDW4300S and other IP-based products. This vulnerability stems from an improperly secured debug function that was inadvertently left enabled in the production firmware. The debug functionality was originally designed for internal development and testing purposes during the product development lifecycle, serving as a diagnostic tool for engineers to analyze system behavior and optimize performance. However, the security oversight occurred when this debug interface remained active in the final product firmware, creating an unauthorized access vector that could be exploited by malicious actors.
The technical nature of this vulnerability lies in the authentication bypass mechanism that allows unauthorized access to the device's firmware upgrade process. The debug function operates through a specific data channel that permits one-way data reception only, which initially appears to limit its impact to read-only operations. However, this seemingly benign functionality creates a critical security gap because it can be leveraged to bypass standard authentication mechanisms required for firmware updates. The vulnerability specifically affects the firmware upgrade authentication process, which is a fundamental security control designed to ensure that only authorized firmware versions can be installed on the device. This weakness enables attackers to potentially install malicious firmware or perform unauthorized system modifications.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it fundamentally compromises the integrity and security of the affected surveillance systems. While the debug function itself was not designed to collect user privacy data or enable remote code execution directly, the authentication bypass capability creates a pathway for more severe attacks. An attacker who exploits this vulnerability could potentially gain administrative access to the device, modify system configurations, or install backdoors that persist across reboots. This vulnerability directly impacts the security posture of surveillance deployments, as it undermines the device's ability to maintain secure firmware integrity and can lead to complete system compromise. The implications are particularly concerning for security-sensitive environments where surveillance equipment serves as a critical component of overall security infrastructure.
Organizations should implement immediate mitigations including disabling the debug functionality through firmware updates from Dahua, applying network segmentation to isolate affected devices, and monitoring for unauthorized firmware modifications. The vulnerability aligns with CWE-284, which addresses improper access control, and represents a classic case of insecure configuration where development-time tools were not properly secured for production deployment. From an ATT&CK perspective, this vulnerability maps to T1072 for software deployment, T1068 for local privilege escalation, and T1547 for registry run keys, as attackers could leverage this to establish persistent access. The incident highlights the critical importance of proper security testing during development phases and the need for comprehensive security reviews of all system components, particularly those that remain active in production environments. Organizations should also implement continuous monitoring for unauthorized changes to device configurations and firmware versions to detect potential exploitation attempts.