CVE-2017-12929 in DLX Spot Player4
Summary
by MITRE
Arbitrary File Upload in resource.php of TecnoVISION DLX Spot Player4 version >1.5.10 allows remote authenticated users to upload arbitrary files leading to Remote Command Execution.
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Analysis
by VulDB Data Team • 06/22/2024
The CVE-2017-12929 vulnerability represents a critical security flaw in TecnoVISION DLX Spot Player4 software versions greater than 1.5.10, specifically within the resource.php component. This vulnerability stems from insufficient input validation and file upload restrictions that permit authenticated attackers to bypass security controls and upload malicious files to the target system. The flaw exists in the application's handling of file uploads without proper sanitization of file names, types, or content, creating an avenue for attackers to execute arbitrary commands on the affected system. The vulnerability is particularly concerning because it combines authentication bypass elements with remote code execution capabilities, making it a severe threat to organizations relying on this media player software for digital signage operations.
The technical implementation of this vulnerability involves a weakness in the resource.php script that processes file uploads without adequate validation mechanisms. Attackers can exploit this by uploading specially crafted files that contain malicious code, potentially including web shells, malware, or other harmful payloads. The authentication requirement means that an attacker must first obtain valid credentials to exploit this vulnerability, but once authenticated, they can leverage the arbitrary file upload capability to gain persistent access to the system. This flaw aligns with CWE-434 which describes the weakness of allowing untrusted data to be uploaded to a web server, and specifically relates to CWE-22 which addresses path traversal vulnerabilities that can occur during file upload operations. The vulnerability demonstrates poor input validation practices and inadequate access control enforcement within the application's file handling mechanisms.
The operational impact of CVE-2017-12929 extends beyond simple remote code execution, creating a comprehensive attack surface that can compromise entire network infrastructures. Organizations utilizing TecnoVISION DLX Spot Player4 systems may face unauthorized access to sensitive data, system compromise, and potential lateral movement within their networks. The vulnerability affects digital signage deployments where these players are often connected to internal networks and may have elevated privileges or access to network resources. Attackers can use this vulnerability to establish persistent backdoors, exfiltrate data, or launch further attacks against other systems within the organization's infrastructure. The remote execution capability means that attackers do not need physical access to the device, making the vulnerability particularly dangerous for organizations with distributed digital signage deployments. This aligns with ATT&CK technique T1059 which describes executing commands through remote access capabilities, and T1078 which covers legitimate credentials for unauthorized access.
Mitigation strategies for CVE-2017-12929 require immediate action to address the root cause of the vulnerability. Organizations should implement the latest security patches provided by TecnoVISION or upgrade to versions that have resolved this issue. The patch should include enhanced file validation mechanisms that restrict file types, enforce strict naming conventions, and implement proper access controls for file upload operations. Security measures should include implementing proper input sanitization, using secure file handling practices, and deploying web application firewalls to monitor and block suspicious file upload attempts. Additionally, organizations should conduct regular security assessments of their digital signage infrastructure, implement network segmentation to limit the potential impact of compromise, and establish monitoring procedures to detect unauthorized file uploads. The mitigation approach should also include user access control reviews to ensure that only authorized personnel have upload privileges, and regular security training for staff managing these systems. Organizations should consider implementing automated vulnerability scanning tools to identify similar weaknesses in their digital signage deployments and establish incident response procedures for potential exploitation attempts.