CVE-2023-32166 in D-View
Summary
by MITRE • 05/03/2024
D-Link D-View uploadFile Directory Traversal Arbitrary File Creation Vulnerability. This vulnerability allows remote attackers to create arbitrary files on affected installations of D-Link D-View. Authentication is required to exploit this vulnerability.
The specific flaw exists within the uploadFile function. The issue results from the lack of proper validation of a user-supplied path prior to using it in file operations. An attacker can leverage this vulnerability to create files in the context of SYSTEM. Was ZDI-CAN-19527.
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Analysis
by VulDB Data Team • 08/07/2025
The CVE-2023-32166 vulnerability represents a critical directory traversal flaw in D-Link D-View systems that enables remote attackers to perform arbitrary file creation operations. This vulnerability specifically targets the uploadFile function within the D-View software ecosystem, where insufficient input validation allows malicious actors to manipulate file paths and execute unauthorized file creation activities. The vulnerability requires authentication to exploit, meaning that an attacker must first establish valid credentials before attempting to leverage this weakness, though the implications remain severe once accessed. The flaw stems from inadequate sanitization of user-supplied paths before they are processed in file operations, creating a direct pathway for path manipulation attacks.
The technical nature of this vulnerability aligns with CWE-22, which describes improper limitation of a pathname to a restricted directory, commonly known as directory traversal or path traversal attacks. This weakness allows attackers to access files and directories outside the intended scope by manipulating input parameters that control file operations. In the context of D-Link D-View, the vulnerability specifically affects the uploadFile functionality where the system fails to properly validate or sanitize the file path supplied by users. When an attacker crafts malicious input containing directory traversal sequences such as ../ or ..\, the system processes these paths without adequate restrictions, potentially allowing file creation in system directories or other unauthorized locations.
The operational impact of this vulnerability is particularly concerning as it enables attackers to create arbitrary files with SYSTEM-level privileges, effectively providing them with persistent access mechanisms and potential escalation capabilities. This arbitrary file creation capability can be leveraged to establish backdoors, deploy malicious payloads, or modify critical system files that could compromise the entire D-View installation. The vulnerability's remote exploitation potential means that attackers can target affected systems without requiring physical access, making it particularly dangerous in networked environments. Furthermore, since the vulnerability requires authentication, it suggests that attackers may need to obtain valid credentials through other means such as credential stuffing, phishing attacks, or exploiting other vulnerabilities to gain initial access before leveraging this directory traversal flaw.
The attack surface for this vulnerability extends beyond simple file creation to include potential privilege escalation and persistent access mechanisms within the D-Link D-View environment. Attackers could use this capability to upload malicious scripts, configuration files, or other payloads that could maintain access even after system restarts. The fact that this vulnerability allows operations in the context of SYSTEM indicates that successful exploitation could result in complete system compromise, potentially enabling attackers to execute arbitrary code, access sensitive data, or disrupt critical operations. Organizations using D-Link D-View systems should consider this vulnerability in their threat modeling and incident response planning, as it could serve as a foundational attack vector for more sophisticated compromise techniques.
Mitigation strategies for this vulnerability should include immediate patching of affected D-Link D-View installations to address the directory traversal flaw in the uploadFile function. Network segmentation and access controls should be implemented to limit the exposure of D-View systems to untrusted networks and users. Additionally, organizations should implement comprehensive monitoring of file system activities, particularly around upload and creation operations, to detect potential exploitation attempts. Input validation controls should be strengthened to ensure that all user-supplied paths are properly sanitized and validated before being processed in file operations. Security configurations should enforce strict access controls and authentication mechanisms to reduce the likelihood of unauthorized access to the vulnerable system components. Regular vulnerability assessments and penetration testing should be conducted to identify and remediate similar weaknesses in the broader network infrastructure and application environments.