CVE-2017-16348 in Insteon
Summary
by MITRE
An exploitable denial of service vulnerability exists in Insteon Hub running firmware version 1012. Leftover demo functionality allows for arbitrarily rebooting the device without authentication. An attacker can send a UDP packet to trigger this vulnerability.
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Analysis
by VulDB Data Team • 05/04/2023
The CVE-2017-16348 vulnerability represents a critical denial of service flaw in Insteon Hub devices running firmware version 1012, where leftover demo functionality persists in production code. This vulnerability stems from improper access control mechanisms that fail to validate authentication requirements before executing sensitive operations. The flaw allows unauthorized remote exploitation through a simple UDP packet transmission, making it particularly dangerous as it requires no prior authentication credentials or complex attack vectors. The presence of demo functionality in production firmware indicates poor software development lifecycle practices and inadequate security testing during the release process.
The technical implementation of this vulnerability involves the device's UDP listening service which processes incoming packets without proper authentication validation. When a specially crafted UDP packet is transmitted to the affected device, it triggers a function that reboots the entire hub system. This reboot operation occurs regardless of the packet source or content, as the authentication checks have been inadvertently left enabled in the production firmware. The vulnerability demonstrates a classic case of insecure direct object reference where legitimate system functions remain accessible through unauthenticated interfaces. According to CWE guidelines, this maps to CWE-284 Access Control Issues, specifically where insufficient access control allows unauthorized users to perform privileged operations.
The operational impact of this vulnerability extends beyond simple service disruption, as the Insteon Hub serves as a central control point for home automation systems. An attacker can repeatedly trigger the reboot functionality, causing persistent service outages that affect connected smart home devices including lighting controls, security systems, and environmental monitoring equipment. This denial of service condition can be particularly damaging in environments where automation reliability is critical, such as commercial buildings or residential security systems. The vulnerability also creates potential for more sophisticated attacks, as repeated reboots can be used to disrupt normal operations while the device is temporarily unavailable. From an ATT&CK framework perspective, this vulnerability aligns with T1499 Network Denial of Service and T1072 Software Deployment Tools, as it enables an attacker to compromise the operational availability of networked devices.
Mitigation strategies for CVE-2017-16348 should prioritize immediate firmware updates from Insteon to address the insecure demo functionality. Network administrators should implement firewall rules to block unauthorized UDP traffic to the affected device ports, particularly when the device is not properly secured within a trusted network segment. The vulnerability highlights the importance of proper code review processes that ensure demo or test functionality is completely removed from production builds. Organizations should also consider network segmentation to isolate critical automation devices and implement monitoring solutions to detect unusual reboot patterns that may indicate exploitation attempts. Additionally, regular security assessments should be conducted to identify similar insecure functionality that may persist in other networked devices within the infrastructure.