CVE-2019-10971 in Network Configurator for DeviceNet Safety
Summary
by MITRE
The application (Network Configurator for DeviceNet Safety 3.41 and prior) searches for resources by means of an untrusted search path that could execute a malicious .dll file not under the application's direct control and outside the intended directories.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 10/05/2023
The vulnerability identified as CVE-2019-10971 represents a critical security flaw in the Network Configurator for DeviceNet Safety version 3.41 and earlier releases. This application exhibits insecure direct object reference behavior when resolving system resources, creating a pathway for malicious code execution through improper search path handling. The flaw stems from the application's failure to properly validate or restrict the directories from which it loads dynamic link libraries, effectively allowing adversaries to place malicious executables in locations that the application will automatically traverse during normal operation.
This vulnerability directly maps to CWE-427 Uncontrolled Search Path Element, a well-documented weakness that occurs when an application searches for resources using a path that includes untrusted elements. The affected application's resource resolution mechanism does not adequately sanitize the search path, enabling attackers to manipulate the system's library loading sequence. When the application attempts to load required components, it will inadvertently execute malicious code placed in directories that appear earlier in the search order than the intended application directories.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it enables arbitrary code execution with the privileges of the user running the Network Configurator application. Attackers can exploit this weakness by placing a malicious .dll file in a directory that appears earlier in the system's PATH environment variable or in directories that the application searches by default. This creates a persistent threat vector that can be leveraged for privilege escalation, data exfiltration, or further system compromise. The vulnerability is particularly concerning in industrial control environments where the Network Configurator for DeviceNet Safety is commonly deployed, as it could potentially disrupt critical infrastructure operations.
From an attack perspective, this vulnerability aligns with ATT&CK technique T1059.001 Command and Scripting Interpreter and T1068 Exploitation for Privilege Escalation, as it provides a mechanism for executing malicious code within the context of the application's running process. The attack surface is expanded by the fact that many industrial environments have less stringent security controls, making such vulnerabilities more attractive targets for adversaries. Organizations should implement proper PATH sanitization, use secure coding practices that enforce strict directory validation, and regularly update affected applications to prevent exploitation. The vulnerability also highlights the importance of principle of least privilege and defense in depth strategies in industrial environments where such applications are critical to operations.