CVE-2021-37130 in FusionCube
Summary
by MITRE • 10/27/2021
There is a path traversal vulnerability in Huawei FusionCube 6.0.2.The vulnerability is due to that the software uses external input to construct a pathname that is intended to identify a directory that is located underneath a restricted parent directory, but the software does not properly validate the pathname. Successful exploit could allow the attacker to access a location that is outside of the restricted directory by a crafted filename.
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Analysis
by VulDB Data Team • 10/31/2021
The vulnerability CVE-2021-37130 represents a critical path traversal flaw in Huawei FusionCube 6.0.2, a comprehensive data center infrastructure solution that integrates compute, storage, and networking capabilities. This vulnerability stems from insufficient input validation mechanisms within the software's file handling processes, specifically when constructing pathnames for directory access operations. The flaw exists in the software's attempt to restrict file access to predetermined directories while allowing external inputs to influence pathname construction, creating a dangerous intersection between user-controllable data and system file operations.
The technical implementation of this vulnerability occurs when the FusionCube software processes user-supplied filenames or path components without adequate sanitization or validation against the intended restricted directory boundaries. Attackers can exploit this weakness by crafting malicious filenames that contain directory traversal sequences such as "../" or similar path manipulation techniques. When the software processes these inputs, it fails to properly validate or sanitize the constructed pathnames, allowing the system to interpret the crafted inputs as legitimate access requests to directories outside the intended restricted parent directory. This misconfiguration enables unauthorized access to sensitive system files, configuration data, and potentially other restricted directories within the system's filesystem hierarchy.
The operational impact of this vulnerability extends beyond simple unauthorized file access, as it provides attackers with the capability to escalate their privileges and potentially compromise the entire FusionCube infrastructure. An attacker who successfully exploits this vulnerability could access critical system configuration files, database contents, log files, and other sensitive data that should remain isolated within the restricted directory structure. The implications are particularly severe in enterprise environments where FusionCube systems manage critical data center operations, as this vulnerability could lead to complete system compromise, data exfiltration, and disruption of business-critical services. The vulnerability affects the software's security model by undermining the fundamental principle of least privilege and directory access control that should protect sensitive system resources from unauthorized access.
This vulnerability aligns with CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal. The flaw also relates to ATT&CK technique T1059.007 for command and scripting interpreter, where attackers might leverage path traversal to access system tools or scripts, and T1566 for phishing with social engineering, as the vulnerability could be exploited through crafted file uploads or web interface interactions. Mitigation strategies should include immediate implementation of strict input validation mechanisms, proper path normalization and canonicalization, and enforcement of access controls that prevent directory traversal sequences from being processed as valid path components. Organizations should also consider implementing web application firewalls, regular security assessments, and monitoring for anomalous file access patterns that could indicate exploitation attempts. The vulnerability highlights the critical importance of secure coding practices and proper input validation in enterprise software systems, particularly those handling sensitive infrastructure data.