CVE-2017-2890 in Circle with Disney
Summary
by MITRE
An exploitable vulnerability exists in the /api/CONFIG/restore functionality of Circle with Disney running firmware 2.0.1. Specially crafted network packets can cause an OS command injection. An attacker can send an HTTP request trigger this vulnerability.
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Analysis
by VulDB Data Team • 12/05/2019
The vulnerability identified as CVE-2017-2890 represents a critical command injection flaw within the Circle with Disney security camera system running firmware version 2.0.1. This device, designed for home security monitoring, contains a dangerous weakness in its web application interface that allows remote attackers to execute arbitrary operating system commands. The vulnerability specifically resides in the /api/CONFIG/restore endpoint, which handles configuration restoration processes. When an attacker crafts malicious HTTP requests containing specially formatted payloads, the system fails to properly sanitize input parameters before processing them, creating an opportunity for unauthorized command execution.
This command injection vulnerability stems from inadequate input validation and sanitization within the application's configuration restoration functionality. The flaw allows attackers to inject operating system commands directly into the device's processing pipeline through the API endpoint. The vulnerability is particularly concerning because it can be exploited remotely without requiring authentication, making it accessible to any network-connected attacker. The attack vector involves sending HTTP requests to the vulnerable API endpoint, where the system processes user-supplied parameters without proper validation, leading to arbitrary command execution with the privileges of the web application process.
The operational impact of this vulnerability is severe and multifaceted. An attacker who successfully exploits this command injection flaw can gain complete control over the affected Circle with Disney device, potentially leading to unauthorized surveillance access, data exfiltration, and use of the device as a pivot point for attacking other networked systems. The compromised device could be used to launch further attacks against the local network, as it would be running with elevated privileges and could potentially access other connected devices. Additionally, the attacker could modify device configurations, disable security features, or even use the device as a command and control node for botnet activities.
From a cybersecurity perspective, this vulnerability maps to CWE-77 and CWE-88 within the Common Weakness Enumeration framework, specifically representing command injection flaws where external input is not properly validated or sanitized. The attack pattern aligns with techniques described in the MITRE ATT&CK framework under the T1059.001 tactic for Command and Scripting Interpreter, where adversaries leverage system commands to execute malicious code. Organizations should implement immediate mitigations including firmware updates to address the vulnerability, network segmentation to isolate affected devices, and monitoring for suspicious HTTP traffic patterns. The most effective long-term solution involves patching the firmware to properly validate and sanitize all input parameters before processing, implementing proper input validation controls, and deploying network-based intrusion detection systems to monitor for exploitation attempts.