CVE-2023-47171 in AVideo
Summary
by MITRE • 01/10/2024
An information disclosure vulnerability exists in the aVideoEncoder.json.php chunkFile path functionality of WWBN AVideo 11.6 and dev master commit 15fed957fb. A specially crafted HTTP request can lead to arbitrary file read.
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Analysis
by VulDB Data Team • 01/28/2024
The vulnerability identified as CVE-2023-47171 represents a critical information disclosure weakness within the WWBN AVideo 11.6 media encoding system and its development version. This flaw resides in the aVideoEncoder.json.php component specifically within the chunkFile path handling functionality, creating a pathway for unauthorized access to sensitive system files. The vulnerability stems from inadequate input validation and path traversal controls that allow malicious actors to manipulate HTTP requests and gain access to arbitrary files on the server filesystem.
Technical exploitation of this vulnerability occurs through carefully crafted HTTP requests that manipulate the chunkFile parameter within the aVideoEncoder.json.php script. When the application processes these malformed requests, it fails to properly sanitize or validate the file path inputs, enabling attackers to traverse the filesystem and read files that should remain protected. This type of vulnerability falls under CWE-22 - Improper Limitation of a Pathname to a Restricted Directory and is classified as a path traversal attack vector. The flaw allows for arbitrary file read operations that can potentially expose configuration files, database credentials, user data, and other sensitive information stored on the server.
The operational impact of this vulnerability is severe as it provides attackers with the capability to extract confidential information from the affected system without proper authentication. An attacker could potentially access database connection strings, API keys, user credentials, and application configuration files that contain sensitive operational data. This information disclosure can lead to further exploitation opportunities including privilege escalation, lateral movement within the network, and complete system compromise. The vulnerability affects both the stable 11.6 release and the development master branch, indicating a persistent flaw that has not been adequately addressed in the codebase. According to ATT&CK framework, this vulnerability maps to T1566.002 - Phishing via Service and T1005 - Data from Local System, as it enables unauthorized data extraction from the target system.
Mitigation strategies for this vulnerability should include immediate input validation and sanitization of all user-supplied parameters, particularly those related to file paths and chunkFile operations. Organizations should implement proper access controls and file system permissions to limit what files can be accessed through the encoding system. The recommended approach includes implementing a whitelist-based file access control mechanism, where only predefined and safe file paths are allowed for processing. Additionally, the application should enforce strict path validation to prevent directory traversal attacks and implement proper error handling that does not reveal system file paths or internal structure information. System administrators should also consider implementing web application firewalls to detect and block suspicious request patterns targeting this vulnerability. Regular security updates and patch management procedures should be enforced to address similar vulnerabilities in the future and maintain overall system security posture.