CVE-2019-9632 in CDG
Summary
by MITRE
ESAFENET CDG V3 and V5 has an arbitrary file download vulnerability via the fileName parameter in download.jsp because the InstallationPack parameter is mishandled in a /CDGServer3/ClientAjax request.
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Analysis
by VulDB Data Team • 07/31/2023
The vulnerability identified as CVE-2019-9632 affects ESAFENET CDG V3 and V5 systems, representing a critical arbitrary file download flaw that could enable unauthorized access to sensitive system files. This vulnerability exists within the download.jsp component where the fileName parameter fails to properly validate or sanitize input from the InstallationPack parameter. The issue arises from improper handling of user-supplied data within the /CDGServer3/ClientAjax request pathway, creating a direct exploitation vector for attackers seeking to access restricted files on the affected systems.
The technical implementation of this vulnerability stems from insufficient input validation and parameter sanitization within the web application's file download mechanism. When the InstallationPack parameter is processed through the download.jsp script, the system fails to properly filter or restrict the fileName value, allowing malicious actors to manipulate the parameter to request arbitrary files from the server's file system. This flaw operates under CWE-22 which categorizes improper limitation of a pathname to a restricted directory, commonly known as path traversal vulnerabilities. The vulnerability essentially allows an attacker to bypass normal access controls and retrieve files that should remain protected within the application's restricted directories.
From an operational impact perspective, this vulnerability poses significant risks to organizations using ESAFENET CDG systems, as it could potentially expose sensitive configuration files, database credentials, application source code, or other confidential data. Attackers could leverage this weakness to gain unauthorized access to system internals, potentially leading to further exploitation opportunities including privilege escalation, data exfiltration, or complete system compromise. The vulnerability affects both V3 and V5 versions of the software, indicating it represents a persistent flaw in the product's architecture rather than a temporary issue. This weakness creates an attack surface that aligns with ATT&CK technique T1213.002 for Data from Information Repositories, allowing adversaries to harvest sensitive information through unauthorized file access.
The exploitation of this vulnerability typically requires minimal technical expertise and can be executed through simple HTTP requests that manipulate the fileName parameter to traverse directory structures. Security professionals should note that this vulnerability represents a classic example of insecure direct object references and improper input validation, both of which are commonly exploited in web application attacks. Organizations should implement immediate mitigations including parameter validation, input sanitization, and access controls to prevent unauthorized file access. The vulnerability's presence in multiple versions of the software suggests that patch management and security updates should be prioritized across all affected installations to prevent exploitation attempts.