CVE-2017-14446 in Insteon
Summary
by MITRE
An exploitable stack-based buffer overflow vulnerability exists in Insteon Hub running firmware version 1012. The HTTP server implementation unsafely extracts parameters from the query string, leading to a buffer overflow on the stack. An attacker can send an HTTP GET request to trigger this vulnerability.
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Analysis
by VulDB Data Team • 03/12/2020
The vulnerability identified as CVE-2017-14446 represents a critical stack-based buffer overflow in Insteon Hub firmware version 1012, specifically within the HTTP server implementation. This flaw arises from unsafe parameter extraction from HTTP query strings, creating a condition where maliciously crafted input can overwrite adjacent stack memory. The vulnerability is particularly concerning as it allows remote code execution through simple HTTP GET requests, making it accessible to attackers without requiring physical access or specialized privileges. The stack-based nature of the overflow means that the attacker can potentially overwrite return addresses and function pointers, leading to arbitrary code execution or system crashes.
The technical implementation of this vulnerability stems from improper bounds checking during query string parameter parsing within the HTTP server component. When the Insteon Hub processes incoming HTTP GET requests, it fails to validate the length of parameters extracted from the query string before copying them into fixed-size stack buffers. This classic buffer overflow condition occurs because the application does not perform adequate input sanitization or length verification before performing memory operations. The vulnerability is categorized under CWE-121 Stack-based Buffer Overflow, which is a well-documented weakness in software security that has been consistently ranked among the top ten web application security risks. According to the ATT&CK framework, this vulnerability maps to T1203 Exploitation for Client Execution, as it enables remote attackers to execute arbitrary code on the target device through web-based exploitation techniques.
The operational impact of this vulnerability extends beyond simple remote code execution, as it fundamentally compromises the security posture of Insteon Hub devices within home automation networks. Since the Insteon Hub serves as a central controller for smart home devices, successful exploitation could allow attackers to gain complete control over connected lighting, security systems, and other IoT devices. The attack vector is particularly dangerous because it requires no authentication and can be executed through standard web browsers or automated tools, making it suitable for large-scale exploitation campaigns. Network reconnaissance and exploitation can be conducted entirely over the internet, with attackers able to target multiple devices simultaneously without requiring local network access. The vulnerability affects not just individual devices but entire smart home ecosystems, as the compromised hub could potentially be used as a pivot point to attack other networked devices within the same infrastructure.
Mitigation strategies for CVE-2017-14446 should prioritize immediate firmware updates from Insteon, as the manufacturer likely released patches addressing this specific buffer overflow condition. Network segmentation and firewall rules should be implemented to restrict access to the Insteon Hub's HTTP ports, particularly port 80, which is typically used for web-based management interfaces. Additional protective measures include disabling unnecessary HTTP services, implementing intrusion detection systems to monitor for suspicious query string patterns, and conducting regular vulnerability assessments of the smart home network infrastructure. Security professionals should also consider deploying network monitoring tools that can detect anomalous HTTP traffic patterns that might indicate exploitation attempts. The vulnerability highlights the importance of secure coding practices in embedded systems and demonstrates the critical need for input validation and bounds checking in all network-facing components. Organizations should also implement regular security audits of IoT devices and establish procedures for timely firmware updates to protect against known vulnerabilities in their connected infrastructure.