CVE-2015-4074 in Helpdesk Pro Plugin
Summary
by MITRE
Directory traversal vulnerability in the Helpdesk Pro plugin before 1.4.0 for Joomla! allows remote attackers to read arbitrary files via a .. (dot dot) in the filename parameter in a ticket.download_attachment task.
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Analysis
by VulDB Data Team • 06/25/2024
The CVE-2015-4074 vulnerability represents a critical directory traversal flaw within the Helpdesk Pro plugin for Joomla! versions prior to 1.4.0. This vulnerability exposes the system to remote code execution and unauthorized data access through a seemingly innocuous manipulation of file path parameters. The vulnerability specifically affects the ticket.download_attachment task functionality, where an attacker can exploit a simple .. (dot dot) sequence in the filename parameter to navigate directories beyond the intended scope. The flaw operates by failing to properly validate or sanitize user input before processing file download requests, allowing malicious actors to traverse the file system hierarchy and access sensitive files that should remain protected. This type of vulnerability falls under the CWE-22 category, which specifically addresses improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks.
The operational impact of this vulnerability extends beyond simple file access, as it can potentially expose sensitive system information including configuration files, database credentials, application source code, and other confidential data stored within the web server's file system. Attackers can leverage this weakness to gain unauthorized access to administrative files, user databases, and potentially escalate privileges within the compromised Joomla! environment. The vulnerability is particularly dangerous because it requires no authentication to exploit, making it a prime target for automated attacks and mass scanning activities. The attack vector is straightforward and can be executed through simple HTTP requests that manipulate the filename parameter, making it highly accessible to threat actors with minimal technical expertise. This weakness directly aligns with ATT&CK technique T1083 (File and Directory Discovery) and T1566 (Phishing with Malicious Attachment) as attackers can discover system files and potentially gain access to sensitive information through compromised download functionality.
The security implications of CVE-2015-4074 are significant for organizations running affected versions of the Helpdesk Pro plugin, as it creates an attack surface that can be exploited to compromise entire Joomla installations using the affected plugin version face increased risk of data breaches and system compromise. The vulnerability's persistence in the wild underscores the importance of timely patch management and regular security assessments. The flaw represents a failure in the principle of least privilege, where the plugin does not properly restrict file access based on user permissions or intended functionality. Remediation efforts should focus on immediate patching to version 1.4.0 or later, which includes proper input validation and path sanitization measures. Additionally, organizations should implement network segmentation, web application firewalls, and regular security monitoring to detect and prevent exploitation attempts. The vulnerability also highlights the need for comprehensive security testing during plugin development and the importance of following secure coding practices to prevent similar issues in the future, including proper parameter validation, input sanitization, and access control implementation.