CVE-2009-4946 in Com Messaging
Summary
by MITRE
Directory traversal vulnerability in the Messaging (com_messaging) component before 1.5.1 for Joomla! allows remote attackers to include and execute arbitrary local files via directory traversal sequences in the controller parameter in a messages action to index.php. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.
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Analysis
by VulDB Data Team • 01/04/2018
This directory traversal vulnerability exists within the Joomla! content management system's messaging component, specifically affecting versions prior to 1.5.1. The flaw allows remote attackers to exploit a weakness in how the system processes the controller parameter within the messages action of index.php. When an attacker crafts malicious input containing directory traversal sequences such as ../ or ..\, they can manipulate the application's file inclusion mechanism to access arbitrary local files on the server. This vulnerability represents a critical security risk as it enables attackers to potentially execute arbitrary code or gain unauthorized access to sensitive system resources. The issue stems from inadequate input validation and sanitization of user-supplied parameters, allowing malicious actors to bypass normal access controls and traverse the file system hierarchy.
The technical implementation of this vulnerability occurs through the improper handling of the controller parameter in the messaging component's controller logic. When the application processes the messages action, it fails to properly validate or sanitize the controller input, enabling attackers to inject directory traversal sequences that manipulate the file inclusion process. This flaw aligns with CWE-22, which describes improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. The vulnerability allows for arbitrary file inclusion, which can lead to remote code execution, data theft, or complete system compromise depending on the privileges of the web application and the files accessible through the traversal mechanism.
The operational impact of this vulnerability extends beyond simple file access, as it provides attackers with the capability to execute arbitrary code on the target system. Successful exploitation could enable attackers to read sensitive configuration files, access database credentials, install backdoors, or escalate privileges within the Joomla! environment. This type of vulnerability falls under ATT&CK technique T1059, which covers command and scripting interpreter, as the ability to execute arbitrary code through file inclusion creates opportunities for attackers to deploy malicious payloads. The vulnerability is particularly dangerous in shared hosting environments where multiple applications reside on the same server, as it could potentially allow attackers to access files belonging to other applications or system components.
Mitigation strategies for this vulnerability should focus on immediate patching of the affected Joomla installation. The remediation process should also include monitoring for suspicious file access patterns and implementing proper logging mechanisms to detect potential exploitation attempts. Organizations should follow security best practices including principle of least privilege, regular security updates, and comprehensive security awareness training for administrators to prevent such vulnerabilities from being exploited in production environments.