CVE-2017-8136 in HedEx
Summary
by MITRE
HedEx Earlier than V200R006C00 versions has an arbitrary file download vulnerability. An attacker could exploit it to download arbitrary files on a target device to cause information leak.
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Analysis
by VulDB Data Team • 01/11/2023
The HedEx system vulnerability identified as CVE-2017-8136 represents a critical arbitrary file download flaw affecting versions prior to V200R006C00. This vulnerability resides in the file handling mechanisms of the HedEx software platform, where insufficient input validation allows malicious actors to manipulate file access parameters. The flaw enables unauthorized file retrieval from the target system, creating significant information disclosure risks. The vulnerability specifically impacts the authentication and authorization controls within the file download functionality, where user-supplied parameters are not properly sanitized or validated before being processed by the underlying file system operations.
From a technical perspective, this vulnerability manifests as a path traversal or directory traversal issue that allows attackers to bypass normal file access restrictions. The flaw operates by accepting user-controllable input that directly influences file path resolution, enabling attackers to navigate beyond intended directories and access restricted files. This type of vulnerability is classified under CWE-22 Path Traversal and aligns with ATT&CK technique T1074 Data Staged, where adversaries stage data for exfiltration. The vulnerability exists in the application logic where file access requests are processed without proper validation of the requested file paths, allowing attackers to construct malicious paths that traverse the file system hierarchy.
The operational impact of this vulnerability extends beyond simple information disclosure, as it can potentially expose sensitive system files, configuration data, database files, or user credentials stored on the affected system. Attackers could leverage this vulnerability to access system logs, application configuration files, or even database files that contain critical business or personal information. The vulnerability affects the confidentiality aspect of the CIA triad, as it allows unauthorized access to sensitive data that should remain protected. Organizations using affected HedEx versions face risks of data breaches, regulatory compliance violations, and potential escalation to more severe attacks such as privilege escalation or system compromise.
Mitigation strategies for CVE-2017-8136 should prioritize immediate software updates to V200R006C00 or later versions where the vulnerability has been addressed through proper input validation and access control mechanisms. System administrators should implement network segmentation to limit access to HedEx systems and restrict file download capabilities to authorized users only. Additional protective measures include implementing web application firewalls that can detect and block suspicious file path traversal patterns, conducting regular security audits of file access controls, and establishing monitoring procedures to detect unusual file access patterns. The vulnerability also highlights the importance of secure coding practices and input validation, particularly in applications handling file system operations, as outlined in OWASP Top Ten and NIST Cybersecurity Framework guidelines. Organizations should also consider implementing automated vulnerability scanning tools that can detect similar path traversal vulnerabilities in their application environments.