CVE-2016-1136 in Home Spot Cube
Summary
by MITRE
Cross-site scripting (XSS) vulnerability on KDDI HOME SPOT CUBE devices before 2 allows remote authenticated users to inject arbitrary web script or HTML via unspecified vectors.
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Analysis
by VulDB Data Team • 07/11/2018
The CVE-2016-1136 vulnerability represents a critical cross-site scripting flaw discovered in KDDI HOME SPOT CUBE devices running firmware versions prior to 2. This vulnerability falls under the CWE-79 category of Cross-Site Scripting and operates as a server-side vulnerability that permits authenticated attackers to execute malicious scripts within the context of the affected device's web interface. The vulnerability specifically affects the device's web-based management interface, which is commonly used by network administrators and end users to configure and monitor their wireless access points. The affected KDDI HOME SPOT CUBE devices are widely deployed in residential and small office environments, making them attractive targets for attackers seeking to exploit the device's web interface for unauthorized access.
The technical implementation of this XSS vulnerability occurs through unspecified input validation mechanisms within the device's web application. When authenticated users interact with the device's management interface, the system fails to properly sanitize user-supplied input before rendering it in web pages. This allows an attacker who has gained authentication credentials to inject malicious HTML or JavaScript code that executes in the context of other users who access the same management interface. The vulnerability is particularly concerning because it requires only authentication access to the device, meaning that an attacker who has obtained legitimate credentials through social engineering, credential theft, or other means can leverage this vulnerability to escalate their privileges or compromise the entire network. The attack vector typically involves manipulating parameters in HTTP requests or form inputs within the device's web interface.
The operational impact of this vulnerability extends beyond simple script injection, as it can enable attackers to perform a wide range of malicious activities within the compromised network environment. An attacker could potentially steal session cookies, redirect users to malicious websites, modify network configurations, or even execute arbitrary commands on the device. This vulnerability directly violates the principle of least privilege and can facilitate more sophisticated attacks such as man-in-the-middle attacks, network reconnaissance, or the establishment of persistent backdoors. The device's role as a central networking component makes it a valuable target for attackers seeking to establish long-term access to residential or small office networks. From an attacker's perspective, this vulnerability aligns with the ATT&CK technique of Web Application Attack and can be leveraged to establish initial access or move laterally within the network.
Mitigation strategies for CVE-2016-1136 primarily focus on firmware updates and input validation improvements. Device administrators should immediately upgrade to firmware version 2 or later, which contains the necessary patches to address the XSS vulnerability. Network segmentation and access control measures should be implemented to limit the scope of potential damage from compromised devices. Additional protective measures include implementing web application firewalls, regular security audits of web interfaces, and network monitoring to detect anomalous traffic patterns. The vulnerability highlights the importance of secure coding practices and proper input validation in embedded web applications, particularly in IoT devices that are often deployed with minimal security considerations. Organizations should also implement multi-factor authentication for device management interfaces and regularly review access controls to ensure that only authorized personnel can access critical network infrastructure.