CVE-2012-4701 in Niagra AX Framework
Summary
by MITRE
Directory traversal vulnerability in Tridium Niagara AX 3.5, 3.6, and 3.7 allows remote attackers to read sensitive files, and consequently execute arbitrary code, by leveraging (1) valid credentials or (2) the guest feature.
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Analysis
by VulDB Data Team • 05/04/2017
The CVE-2012-4701 vulnerability represents a critical directory traversal flaw affecting Tridium Niagara AX versions 3.5, 3.6, and 3.7, which operates within the industrial control systems domain and presents significant security risks for building automation and industrial IoT environments. This vulnerability resides in the application's handling of file paths and access controls, specifically within the web interface components that manage user authentication and file access operations. The flaw enables remote attackers to bypass normal access controls and retrieve arbitrary files from the server filesystem through carefully crafted requests that exploit improper input validation mechanisms. The vulnerability's severity is amplified by its accessibility through two distinct attack vectors, providing adversaries with multiple pathways to exploit the system and potentially escalate privileges. The vulnerability aligns with CWE-22, which categorizes directory traversal flaws as weaknesses in input validation that allow attackers to access files outside the intended directory structure. This weakness directly maps to the ATT&CK technique T1059.007, which covers command and scripting interpreter execution, as successful exploitation can lead to arbitrary code execution through file retrieval and manipulation.
The technical implementation of this vulnerability stems from insufficient validation of user-supplied input within the application's file access mechanisms, particularly when processing requests that reference file paths. Attackers can manipulate the application's file handling routines by inserting directory traversal sequences such as ../ or ..\ into file request parameters, allowing them to navigate beyond the intended directory boundaries. When valid credentials are available, attackers can leverage legitimate authentication sessions to access restricted files and potentially escalate privileges through the exploitation of the directory traversal mechanism. The guest feature provides an additional attack surface, as it typically operates with reduced privilege levels but still maintains access to system resources that should remain protected. The vulnerability's exploitation process involves sending specially crafted HTTP requests that include directory traversal sequences, which when processed by the vulnerable application, result in the disclosure of sensitive files such as configuration files, database files, or system binaries. These files often contain credentials, encryption keys, or other sensitive information that can be leveraged for further compromise.
The operational impact of CVE-2012-4701 extends beyond simple information disclosure, as the vulnerability creates a pathway for full system compromise within industrial environments where Niagara AX systems are deployed. Organizations utilizing these systems for building automation, manufacturing control, or critical infrastructure management face significant risks when this vulnerability remains unpatched. The ability to execute arbitrary code through file access manipulation means that attackers can potentially install backdoors, modify operational parameters, or disrupt critical processes. In industrial control environments, this could result in operational technology (OT) system compromise, leading to safety hazards, production disruptions, or even physical damage to equipment. The vulnerability's presence in multiple versions of the Niagara AX platform indicates a systemic issue within the software's architecture, requiring comprehensive patch management strategies across all affected systems. Organizations may experience compliance violations under standards such as NIST SP 800-82, which governs the security of industrial control systems, and ISO/IEC 27001, which requires proper vulnerability management and risk assessment procedures.
Mitigation strategies for CVE-2012-4701 must address both immediate remediation and long-term security architecture improvements. The most effective immediate solution involves applying the vendor-provided patches or updates that correct the directory traversal validation mechanisms within the Niagara AX software. Organizations should also implement network segmentation and access control measures to limit exposure of vulnerable systems to untrusted networks. The implementation of web application firewalls and input validation controls can help detect and prevent malicious directory traversal attempts. Security monitoring should focus on identifying anomalous file access patterns and unusual authentication activities that might indicate exploitation attempts. Additionally, organizations should conduct thorough vulnerability assessments to identify other potential directory traversal vulnerabilities within their industrial control systems and implement principle of least privilege access controls for all system components. The remediation process should include comprehensive testing to ensure that patches do not introduce operational disruptions in critical industrial environments. Regular security assessments and penetration testing should be conducted to validate the effectiveness of implemented controls and identify new potential attack vectors that may emerge in the evolving threat landscape.