CVE-2024-8685 in Revolution Pi
Summary
by MITRE • 02/10/2025
Path-Traversal vulnerability in Revolution Pi version 2022-07-28-revpi-buster from KUNBUS GmbH. This vulnerability could allow an authenticated attacker to list device directories via the ‘/pictory/php/getFileList.php’ endpoint in the ‘dir’ parameter.
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Analysis
by VulDB Data Team • 02/10/2025
The vulnerability identified as CVE-2024-8685 represents a path traversal flaw within the Revolution Pi system version 2022-07-28-revpi-buster produced by KUNBUS GmbH. This critical security weakness resides in the web interface component of the industrial automation platform, specifically within the pictory php module that handles file system operations. The vulnerability manifests through the '/pictory/php/getFileList.php' endpoint which processes directory listing requests through the 'dir' parameter, creating an attack vector that could compromise the integrity and confidentiality of industrial control systems.
The technical implementation of this path traversal vulnerability stems from insufficient input validation and sanitization within the getFileList.php script. When an authenticated user submits a request to this endpoint with a maliciously crafted 'dir' parameter, the application fails to properly sanitize the input before using it in file system operations. This allows attackers to manipulate the directory traversal path and access files or directories outside the intended scope, potentially exposing sensitive system information including configuration files, logs, and other system artifacts. The vulnerability aligns with CWE-22 Path Traversal and CWE-77 Path Traversal in the Common Weakness Enumeration catalog, specifically representing a case of improper input validation in web applications.
The operational impact of this vulnerability extends beyond simple directory listing capabilities, as it could enable attackers to gain unauthorized access to sensitive system information that might reveal system architecture, configuration details, or other intelligence useful for further exploitation. Industrial control systems like the Revolution Pi platform are particularly vulnerable to such attacks due to their often limited security monitoring and the critical nature of the infrastructure they control. An authenticated attacker could leverage this vulnerability to perform reconnaissance activities, potentially identifying other system weaknesses or gathering information for more sophisticated attacks. The attack surface is particularly concerning in industrial environments where these systems may lack robust network segmentation and security controls, making them prime targets for attackers seeking to compromise critical infrastructure.
Mitigation strategies for CVE-2024-8685 should focus on immediate patching of the affected Revolution Pi systems through official updates from KUNBUS GmbH, while also implementing network-level controls to restrict access to the vulnerable endpoint. Organizations should enforce strict input validation on all user-supplied parameters and implement proper access controls to limit the functionality available to authenticated users. The principle of least privilege should be applied to restrict what operations authenticated users can perform within the system. Additionally, network segmentation and firewall rules should be configured to prevent unauthorized access to the pictory php module endpoints, and regular security audits should be conducted to identify similar vulnerabilities in industrial control system components. This vulnerability demonstrates the importance of applying security patches promptly in industrial environments and highlights the need for comprehensive security assessments of operational technology systems.