CVE-2016-8211 in Data Protection Advisor
Summary
by MITRE
EMC Data Protection Advisor 6.1.x, EMC Data Protection Advisor 6.2, EMC Data Protection Advisor 6.2.1, EMC Data Protection Advisor 6.2.2, EMC Data Protection Advisor 6.2.3 prior to patch 446 has a path traversal vulnerability that may potentially be exploited by malicious users to compromise the affected system.
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Analysis
by VulDB Data Team • 11/04/2022
The CVE-2016-8211 vulnerability represents a critical path traversal flaw within EMC Data Protection Advisor versions 6.1.x through 6.2.3 prior to patch 446. This vulnerability resides in the web application interface of the data protection software, which is designed to manage and monitor backup operations across enterprise storage environments. The flaw stems from insufficient input validation in file handling mechanisms, particularly within the application's file upload and retrieval functionalities. Attackers can exploit this weakness by manipulating file path parameters in HTTP requests to access arbitrary files on the underlying file system. The vulnerability is particularly concerning because EMC Data Protection Advisor typically runs with elevated privileges and has access to sensitive backup data, making it an attractive target for adversaries seeking to compromise enterprise data protection infrastructure.
The technical exploitation of this path traversal vulnerability occurs when the application fails to properly sanitize user-supplied input that is used in file system operations. Specifically, the flaw allows attackers to craft malicious requests that can traverse directory structures using sequences such as "../" or similar path manipulation techniques. When the application processes these requests without proper validation, it can be tricked into accessing files outside of its intended directory scope. This vulnerability is classified as CWE-22 Path Traversal and aligns with ATT&CK technique T1083 File and Directory Discovery, as it enables attackers to explore the file system structure of the compromised system. The impact is amplified because the affected software often runs with administrative privileges, potentially allowing attackers to access not only configuration files but also backup data, credentials, and other sensitive information stored within the system's file hierarchy.
The operational impact of this vulnerability extends beyond simple data exposure, as it can lead to complete system compromise and data loss within enterprise environments. Organizations using affected EMC Data Protection Advisor versions face significant risks including unauthorized access to backup repositories, potential credential theft from configuration files, and the possibility of executing arbitrary code on the affected system. The vulnerability can be exploited remotely without authentication, making it particularly dangerous in networked environments where the application is accessible over the internet. Security assessments have shown that this flaw can be combined with other vulnerabilities to escalate privileges and gain deeper access to enterprise networks. The potential for data exfiltration is substantial since backup systems typically contain comprehensive copies of organizational data, including sensitive files and system configurations that could be leveraged for further attacks.
Mitigation strategies for CVE-2016-8211 require immediate patching of affected systems with EMC's security updates, specifically patch 446 or later versions. Organizations should also implement network segmentation to limit access to the Data Protection Advisor application and restrict the application's file system permissions to the minimum required for operation. Input validation controls should be strengthened at the application level, with proper sanitization of all file path parameters and implementation of whitelisting mechanisms for file access operations. Security monitoring should be enhanced to detect anomalous file access patterns that may indicate exploitation attempts. The vulnerability demonstrates the importance of proper secure coding practices and input validation, aligning with NIST SP 800-53 security controls for input validation and access control. Regular vulnerability assessments and penetration testing should be conducted to identify similar weaknesses in other enterprise applications, as path traversal vulnerabilities are commonly found in web applications and represent a persistent threat vector in cybersecurity landscapes.