CVE-2017-8409 in DCS-1130
Summary
by MITRE
An issue was discovered on D-Link DCS-1130 devices. The device requires that a user logging to the device to provide a username and password. However, the device does not enforce the same restriction on a specific URL thereby allowing any attacker in possession of that to view the live video feed. The severity of this attack is enlarged by the fact that there more than 100,000 D-Link devices out there.
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Analysis
by VulDB Data Team • 10/15/2023
The vulnerability identified as CVE-2017-8409 represents a critical authentication bypass flaw affecting D-Link DCS-1130 security cameras and similar devices within the D-Link ecosystem. This weakness stems from improper access control implementation where the device maintains inconsistent security measures across different endpoints. While legitimate users must authenticate through standard username and password credentials to access the device interface, a specific URL endpoint remains unprotected, allowing unauthorized access to live video streams without proper authentication. The vulnerability's severity is amplified by the widespread deployment of these devices, with over 100,000 units reportedly affected across various networks and installations.
The technical implementation of this flaw demonstrates a classic authorization bypass vulnerability that falls under CWE-285, which addresses improper authorization within authentication mechanisms. The device's web server fails to properly enforce access controls on all available endpoints, creating a backdoor access point that bypasses the standard authentication flow. This misconfiguration allows attackers to directly access the video feed through a predictable URL pattern that does not require valid credentials, effectively rendering the device's authentication system ineffective for this specific function. The vulnerability exists at the application layer where the web interface fails to validate access permissions before serving sensitive video content.
From an operational impact perspective, this vulnerability creates significant security risks for organizations and individuals who rely on these surveillance devices for security monitoring. Attackers can exploit this flaw to gain unauthorized access to live video feeds from potentially sensitive locations including homes, businesses, and public spaces. The exposure of live video streams through unauthenticated access points compromises the fundamental security purpose of surveillance systems and creates potential privacy violations. Network administrators face the challenge of securing thousands of devices that may be deployed across multiple locations without proper authentication enforcement, making this vulnerability particularly dangerous in enterprise environments where such devices are commonly used for perimeter security and monitoring.
The attack vector for this vulnerability aligns with techniques described in the MITRE ATT&CK framework under the T1190 tactic for Exploit Public-Facing Application, where attackers target exposed services to gain unauthorized access. The attack requires minimal technical expertise since the vulnerability is publicly accessible through a known URL pattern, making it particularly attractive to threat actors seeking quick and effective methods for surveillance access. Mitigation strategies should include immediate firmware updates from D-Link to address the authentication bypass, network segmentation to isolate these devices from critical systems, and implementation of network monitoring to detect unauthorized access attempts. Organizations should also consider disabling unnecessary services, implementing strong access controls for all networked devices, and conducting regular vulnerability assessments to identify similar authentication bypass vulnerabilities in their network infrastructure.