CVE-2019-3702 in Icon
Summary
by MITRE
A Remote Code Execution issue in the DNS Query Web UI in Lifesize Icon LS_RM3_3.7.0 (2421) allows remote authenticated attackers to execute arbitrary commands via a crafted DNS Query address field in a JSON API request.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 09/17/2023
The CVE-2019-3702 vulnerability represents a critical remote code execution flaw within the Lifesize Icon video conferencing system running firmware version 3.7.0 build 2421. This vulnerability specifically targets the DNS query web user interface component that processes JSON API requests, creating a pathway for malicious actors to gain unauthorized system access. The issue stems from insufficient input validation and sanitization within the DNS query address field, allowing attackers to inject and execute arbitrary commands on the affected device. The vulnerability affects the Lifesize Icon LS_RM3_3.7.0 system, which is commonly deployed in enterprise environments for video conferencing and collaboration purposes, making it a significant concern for organizations relying on this technology.
The technical exploitation of this vulnerability occurs through a carefully crafted JSON API request that contains malicious input in the DNS query address field. When the system processes this malformed input without proper validation, it fails to sanitize the user-supplied data before using it in system commands. This primitive command injection vulnerability enables attackers to execute arbitrary code with the privileges of the web application user, which typically has elevated permissions on the device. The vulnerability's classification aligns with CWE-77 and CWE-94, which respectively address command injection and code injection flaws in software systems. The attack vector requires only authenticated access to the web UI, meaning that an attacker with valid credentials can leverage this vulnerability to escalate their privileges and potentially compromise the entire system.
The operational impact of CVE-2019-3702 extends beyond simple remote code execution, as it provides attackers with persistent access to the affected device and potentially enables lateral movement within the network. Organizations using Lifesize Icon systems may face unauthorized data access, system disruption, and potential data exfiltration through this vulnerability. The compromised device could serve as a foothold for attackers to target other systems within the same network segment, particularly in environments where video conferencing systems are not properly isolated from critical business infrastructure. This vulnerability directly impacts the attack surface defined by the MITRE ATT&CK framework under the T1059.001 technique for command and scripting interpreter, specifically targeting the execution of system commands through web interfaces. The presence of such vulnerabilities in enterprise collaboration systems poses significant risk to organizational security posture and highlights the importance of proper input validation in web applications.
Mitigation strategies for CVE-2019-3702 should focus on immediate firmware updates provided by Lifesize, which would address the input validation issues in the DNS query web UI. Organizations should implement network segmentation to isolate video conferencing systems from critical business networks and enforce strict access controls for web UI components. The principle of least privilege should be applied to web application users, ensuring that administrative access is limited to authorized personnel only. Network monitoring should be enhanced to detect unusual API request patterns that might indicate exploitation attempts, particularly those involving command injection payloads. Security teams should also consider implementing web application firewalls to filter malicious JSON requests and conduct regular vulnerability assessments of collaboration systems. Additionally, organizations should maintain comprehensive incident response plans that include procedures for handling device compromise through command injection vulnerabilities, ensuring rapid response to potential exploitation attempts. The vulnerability demonstrates the critical importance of validating all user inputs in web applications and implementing proper sanitization mechanisms to prevent command injection attacks.