CVE-2021-22281 in Studio
Summary
by MITRE • 02/02/2024
: Relative Path Traversal vulnerability in B&R Industrial Automation Automation Studio allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Automation Studio: from 4.0. Through 4.X.
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Analysis
by VulDB Data Team • 02/25/2024
The CVE-2021-22281 vulnerability represents a critical relative path traversal flaw within B&R Industrial Automation's Automation Studio software platform, which serves as a comprehensive development environment for industrial automation projects. This vulnerability specifically targets the access control security mechanisms that govern how users interact with project files and system resources. The flaw exists in Automation Studio versions ranging from 4.0 through 4.X, indicating a broad impact across multiple iterations of this industrial automation software suite. The vulnerability stems from improper configuration of security levels that should normally prevent unauthorized access to system resources through crafted file paths.
The technical implementation of this vulnerability exploits the way the software handles file path resolution when processing user inputs or project configurations. Attackers can manipulate file path references to traverse directories outside of the intended project boundaries, potentially gaining access to sensitive system files, configuration data, or other restricted resources. This type of vulnerability falls under the CWE-22 category for Path Traversal attacks, where insufficient input validation allows attackers to manipulate file access paths. The exploitation typically involves crafting malicious file references that bypass normal access controls, leveraging the software's failure to properly sanitize or validate path inputs before processing them.
The operational impact of this vulnerability extends significantly within industrial automation environments where Automation Studio serves as the primary development and deployment platform for critical control systems. An attacker who successfully exploits this vulnerability could potentially access project files containing proprietary industrial control logic, configuration settings, or security credentials that might compromise entire industrial control networks. The implications are particularly severe in environments where these systems interface directly with operational technology infrastructure, as unauthorized access could lead to disruption of critical manufacturing processes or potential safety hazards. The vulnerability essentially undermines the fundamental security assumptions of the access control mechanisms that should isolate different security levels within the automation environment.
Organizations using B&R Automation Studio versions 4.0 through 4.X should implement immediate mitigation strategies including updating to the latest available software versions that address this specific path traversal vulnerability. System administrators should also review and tighten access control configurations, ensuring that file system permissions properly restrict user access to project directories and prevent unauthorized path traversal attempts. Network segmentation and monitoring should be enhanced to detect suspicious file access patterns that might indicate exploitation attempts. The ATT&CK framework categorizes this vulnerability under privilege escalation and defense evasion techniques, where attackers leverage misconfigured access controls to gain elevated privileges and maintain persistent access to industrial control systems. Regular security assessments and penetration testing should be conducted to identify similar misconfigurations in other industrial automation tools and ensure comprehensive protection against similar attack vectors.