CVE-2023-3256 in R-SeeNet
Summary
by MITRE • 06/22/2023
Advantech R-SeeNet versions 2.4.22 allows low-level users to access and load the content of local files.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 07/17/2023
The vulnerability identified as CVE-2023-3256 affects Advantech R-SeeNet version 2.4.22 and represents a critical path traversal flaw that enables low-privilege users to access local file system content. This issue stems from inadequate input validation and access control mechanisms within the application's file handling routines, allowing authenticated users with minimal privileges to exploit the system's file access functions. The vulnerability specifically manifests when the application processes user-supplied file paths without proper sanitization, creating an opportunity for malicious actors to navigate the file system and retrieve sensitive data. This type of vulnerability falls under the CWE-22 category, which encompasses path traversal attacks that permit unauthorized access to files outside of the intended directory structure. The security implications extend beyond simple data exposure as attackers can potentially access configuration files, system logs, or other sensitive information that may contain credentials or system details. The vulnerability is particularly concerning in industrial control environments where R-SeeNet is commonly deployed, as it could provide attackers with insights into operational procedures and system configurations that might aid in more sophisticated attacks. The impact of this vulnerability is amplified by the fact that it requires minimal privilege levels to exploit, making it accessible to users who should not have access to such extensive file system capabilities.
The technical exploitation of this vulnerability involves leveraging the application's file access functions to manipulate input parameters that control file paths. Attackers can construct malicious requests that bypass normal access controls by using directory traversal sequences such as '../' or similar constructs that allow them to navigate up the file system hierarchy. This flaw specifically affects the application's handling of file operations within its web interface, where user inputs are directly processed without adequate validation or sanitization. The implementation of proper input validation and access control checks would prevent such unauthorized file access by ensuring that all file paths are properly validated against a whitelist of acceptable directories or by implementing proper path normalization techniques. The vulnerability demonstrates poor adherence to secure coding practices and highlights the importance of principle of least privilege in system design. From an operational perspective, this vulnerability could enable attackers to gain access to sensitive information that might include system configurations, user credentials, or operational data that could be used for further exploitation or to understand the target environment. The attack surface is particularly broad in industrial environments where such monitoring systems are deployed, as these systems often contain critical operational data that could be valuable to adversaries.
Organizations utilizing Advantech R-SeeNet version 2.4.22 should implement immediate mitigations to address this vulnerability. The primary recommendation involves applying the vendor-provided security patches or updates that address the path traversal flaw in the file handling components. Additionally, network segmentation should be implemented to limit access to the affected system, particularly restricting access to the web interface from untrusted networks. Access controls should be reviewed and strengthened to ensure that only authorized personnel have access to the system, and that privilege levels are appropriately restricted based on job functions. The implementation of web application firewalls and intrusion detection systems can help monitor for suspicious file access patterns that might indicate exploitation attempts. Security monitoring should include regular review of system logs for unauthorized file access attempts and implementation of automated alerts for unusual file system activity. The vulnerability also highlights the need for comprehensive security awareness training for system administrators and operators who interact with such industrial control systems. Organizations should also consider implementing additional layers of security such as multi-factor authentication for administrative access and regular security audits to ensure that access controls remain appropriate. The ATT&CK framework categorizes this type of vulnerability under T1059 Command and Scripting Interpreter and T1566 Phishing, as attackers may use the information gained from file access to craft more targeted attacks or to escalate privileges within the system. Proper configuration management and regular security assessments are essential to prevent exploitation of similar vulnerabilities in other components of the industrial control environment.