CVE-2019-13941 in OZW672
Summary
by MITRE
A vulnerability has been identified in OZW672 (All versions < V10.00), OZW772 (All versions < V10.00). Vulnerable versions of OZW Web Server use predictable path names for project files that legitimately authenticated users have created by using the application's export function. By accessing a specific uniform resource locator on the web server, a remote attacker could be able to download a project file without prior authentication. The security vulnerability could be exploited by an unauthenticated attacker with network access to the affected system. No user interaction is required to exploit this security vulnerability. Successful exploitation of the security vulnerability compromises the confidentiality of the targeted system.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 03/30/2024
This vulnerability exists in the OZW672 and OZW772 web server applications where predictable path names are used for project files created through the legitimate export function. The flaw stems from inadequate randomization or entropy in the file naming mechanism, allowing attackers to construct valid URLs that directly reference these project files. The vulnerability is classified as a path traversal or predictable file access issue that falls under CWE-22 - Improper Limitation of a Pathname to a Restricted Directory. This weakness enables unauthorized access to sensitive data that should only be available to authenticated users.
The technical implementation of this vulnerability exploits the predictable nature of the file path generation within the web server's file system. When users export projects through the application's interface, the system generates file names or directory structures that follow a discernible pattern rather than using cryptographically secure randomization. This predictability allows remote attackers to enumerate valid file paths and access project files without authentication. The attack vector requires only network access to the affected system and does not necessitate any user interaction, making it particularly dangerous as it can be exploited automatically by automated tools.
The operational impact of this vulnerability is severe as it compromises the confidentiality of the targeted system by allowing unauthorized access to project files that may contain sensitive information. These project files could include proprietary data, configuration details, or other confidential information that would normally be restricted to authorized personnel. The vulnerability affects all versions prior to V10.00 of both OZW672 and OZW772, indicating a long-standing issue that was not properly addressed in the affected software versions. This type of vulnerability is particularly concerning in industrial control systems and network infrastructure where such applications are commonly deployed, as it could lead to operational disruption or security breaches.
The exploitation of this vulnerability aligns with ATT&CK technique T1213 - Data from Information Repositories, where adversaries attempt to access data repositories through predictable file access patterns. The lack of authentication requirement makes this an attractive target for attackers who can leverage the predictable path names to systematically access project files. Organizations should implement immediate mitigations including updating to versions V10.00 or later where the vulnerability has been addressed, implementing proper file access controls, and ensuring that all file path generation uses cryptographically secure randomization. Additionally, network segmentation and access controls should be strengthened to limit exposure to this type of attack vector. The vulnerability demonstrates the importance of proper entropy in file naming systems and highlights the need for robust access control mechanisms in web applications that handle sensitive data.