CVE-2017-14445 in Insteon
Summary
by MITRE
An exploitable buffer overflow vulnerability exists in Insteon Hub running firmware version 1012. The HTTP server implementation incorrectly handles the host parameter during a firmware update request, leading to a buffer overflow on a global section. An attacker can send an HTTP GET request to trigger this vulnerability.
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Analysis
by VulDB Data Team • 04/29/2023
The vulnerability identified as CVE-2017-14445 represents a critical buffer overflow flaw within the Insteon Hub device firmware version 1012, specifically affecting the HTTP server implementation during firmware update operations. This vulnerability stems from improper input validation of the host parameter in HTTP GET requests, creating a condition where maliciously crafted requests can overflow buffer boundaries and overwrite adjacent memory regions. The flaw exists in the global memory section of the application, making it particularly dangerous as it can lead to arbitrary code execution and complete system compromise. The vulnerability is classified under CWE-121 as a stack-based buffer overflow, though the specific implementation in this case affects global variables rather than stack memory. The Insteon Hub serves as a central control point for home automation systems, making this vulnerability particularly concerning for residential and commercial security infrastructure.
The technical exploitation of this vulnerability occurs when an attacker sends a specially crafted HTTP GET request containing an overly long host parameter value during a firmware update process. The HTTP server component fails to properly validate the length of the host parameter before copying it into a fixed-size buffer, allowing the input to exceed the allocated memory space. This overflow can overwrite critical memory locations including return addresses, function pointers, or other global variables that control the application's execution flow. The vulnerability is remotely accessible, meaning attackers can exploit it from outside the local network without requiring physical access or authentication credentials. The attack surface is particularly broad given that the HTTP server operates on standard ports and is designed to accept firmware update requests from remote locations, making it a prime target for network-based attacks.
The operational impact of this vulnerability extends beyond simple system compromise to potentially enable complete takeover of the Insteon Hub device and its connected automation systems. Successful exploitation could allow attackers to execute arbitrary code with the privileges of the HTTP server process, potentially leading to persistent backdoor access, data exfiltration, or disruption of home automation services. The vulnerability affects the broader Internet of Things ecosystem as the Insteon Hub controls lighting, security systems, and other connected devices within the home environment. Network-based attacks could result in unauthorized access to sensitive home automation data, potentially compromising user privacy and security. The vulnerability also represents a significant concern for commercial installations where the hub controls critical building automation systems, as it could lead to operational disruptions or unauthorized access to secured facilities. This flaw exemplifies the security challenges inherent in connected home devices, where firmware update mechanisms often lack proper input validation and security hardening.
Mitigation strategies for CVE-2017-14445 should prioritize immediate firmware updates from Insteon to address the buffer overflow vulnerability in the HTTP server implementation. Network administrators should implement firewall rules to restrict access to the Insteon Hub's HTTP ports from untrusted networks and consider segmenting the device on separate network zones. The vulnerability aligns with ATT&CK technique T1059.007 for command and script interpreter execution, as exploitation could enable attackers to execute arbitrary commands on the device. Additional protective measures include monitoring network traffic for suspicious HTTP GET requests with unusually long host parameters, implementing network intrusion detection systems, and conducting regular security assessments of IoT devices. Organizations should also consider disabling unnecessary firmware update capabilities when not actively performing updates, as this reduces the attack surface. The vulnerability demonstrates the importance of input validation and secure coding practices, particularly for embedded systems handling network requests, and aligns with industry standards such as the OWASP Top Ten and NIST cybersecurity guidelines for IoT device security.