CVE-2023-26293 in TIA Portal
Summary
by MITRE • 04/11/2023
A vulnerability has been identified in TIA Portal V15 (All versions), TIA Portal V16 (All versions), TIA Portal V17 (All versions), TIA Portal V18 (All versions < V18 Update 1). Affected products contain a path traversal vulnerability that could allow the creation or overwrite of arbitrary files in the engineering system. If the user is tricked to open a malicious PC system configuration file, an attacker could exploit this vulnerability to achieve arbitrary code execution.
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Analysis
by VulDB Data Team • 04/27/2023
The vulnerability CVE-2023-26293 represents a critical path traversal flaw within Siemens TIA Portal software versions spanning V15 through V18 Update 1. This issue affects the engineering environment used for industrial automation and control systems development, creating a significant security risk for operational technology infrastructure. The vulnerability stems from insufficient input validation when processing system configuration files, allowing attackers to manipulate file paths during the import process. The flaw exists in the software's handling of file operations within the engineering workstation environment, where legitimate file operations are permitted but malicious path manipulation can occur through specially crafted configuration files.
The technical implementation of this vulnerability enables attackers to exploit a classic path traversal condition by crafting malicious PC system configuration files that contain directory traversal sequences such as ../ or ..\ in their file paths. When a user opens these crafted files within the TIA Portal environment, the software processes the file paths without proper sanitization, allowing the attacker to specify arbitrary locations on the target system. This vulnerability directly maps to CWE-22 Path Traversal and aligns with ATT&CK technique T1059.007 for Command and Scripting Interpreter, as it enables arbitrary code execution through file manipulation. The flaw operates at the file system level, where legitimate engineering operations are performed but malicious file operations can be injected through the configuration file parsing mechanism.
The operational impact of CVE-2023-26293 extends beyond simple file manipulation to potentially enable complete system compromise within industrial control environments. An attacker who successfully exploits this vulnerability could achieve arbitrary code execution on the engineering workstation, potentially leading to system compromise, data exfiltration, or disruption of industrial processes. The vulnerability is particularly concerning in operational technology environments where engineering workstations often have elevated privileges and network access to production systems. Attackers could leverage this vulnerability to establish persistent access within industrial networks, potentially leading to supply chain attacks or lateral movement to other critical systems. The risk is amplified because these engineering workstations frequently contain sensitive configuration data and may have access to network segments containing critical infrastructure components.
Mitigation strategies for CVE-2023-26293 should prioritize immediate software updates to the latest available versions of TIA Portal, specifically targeting V18 Update 1 or later releases where the vulnerability has been addressed. Organizations should implement strict file validation procedures for all configuration files imported into the engineering environment, including network-based file scanning and access control restrictions. Security measures should include network segmentation to limit access to engineering workstations, mandatory user training on identifying malicious files, and implementation of application whitelisting policies. The vulnerability demonstrates the importance of secure coding practices in industrial software development and highlights the need for proper input validation in all file handling operations. Additionally, organizations should conduct regular security assessments of their industrial control systems and implement monitoring solutions to detect suspicious file operations within engineering environments, aligning with NIST SP 800-82 guidelines for industrial control systems security.