CVE-2024-3980 in MicroSCADA SYS600
Summary
by MITRE • 08/27/2024
The product allows user input to control or influence paths or file names that are used in filesystem operations, allowing the attacker to access or modify system files or other files that are critical to the application.
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Analysis
by VulDB Data Team • 08/29/2024
This vulnerability represents a classic path traversal or directory traversal flaw that fundamentally compromises the integrity of file system operations within the affected product. The issue arises when user-supplied input is directly incorporated into file path construction without proper validation or sanitization, creating an opportunity for malicious actors to manipulate the intended file access behavior. Such vulnerabilities are categorized under CWE-22 - Improper Limitation of a Pathname to a Restricted Directory, which is a well-documented weakness in software security practices. The vulnerability enables attackers to bypass normal access controls and potentially gain unauthorized access to sensitive system files, configuration data, or other critical application resources that should remain protected from user interaction.
The technical implementation of this flaw typically involves scenarios where user input flows directly into file system APIs such as file open, read, write, or delete operations. Attackers can exploit this by crafting malicious input that includes directory traversal sequences like "../" or similar path manipulation techniques to navigate outside the intended directory boundaries. When the application processes these inputs without proper validation, it can result in the execution of unintended file system operations that may lead to data exposure, modification of critical files, or even system compromise. This vulnerability operates at the intersection of input validation and privilege separation, where proper access controls should prevent users from accessing resources beyond their authorized scope.
The operational impact of this vulnerability extends beyond simple data exposure to potentially enable more severe security consequences including privilege escalation, data corruption, and system instability. An attacker who successfully exploits this vulnerability could access sensitive information such as database credentials, application configuration files, or system binaries that contain critical security parameters. The vulnerability's exploitation potential aligns with ATT&CK technique T1074.001 - Data Staged, where adversaries stage stolen data, and T1566.001 - Phishing, as attackers may use this vulnerability to gain initial access through user interaction with maliciously crafted inputs. Depending on the application's permissions and the target files accessible through traversal, this vulnerability could enable complete system compromise or data destruction.
Mitigation strategies should focus on implementing robust input validation and sanitization mechanisms that prevent user-supplied data from influencing file system operations. The most effective approach involves implementing a whitelist-based validation system where only predetermined, safe file paths or names are permitted, rather than attempting to filter out dangerous input patterns. Organizations should implement proper access controls and privilege separation to ensure that applications operate with minimal required permissions. Additionally, the use of secure coding practices including input encoding, path normalization, and proper error handling should be enforced throughout the application development lifecycle. Regular security testing including static and dynamic analysis should be conducted to identify and remediate similar vulnerabilities before they can be exploited in production environments. The implementation of security frameworks such as those recommended by OWASP and NIST provides comprehensive guidance for preventing such path traversal vulnerabilities in software development practices.