CVE-2011-0506 in AxDCMS
Summary
by MITRE
Directory traversal vulnerability in modules/profile/user.php in Ax Developer CMS (AxDCMS) 0.1.1 allows remote attackers to execute arbitrary code via a .. (dot dot) in the aXconf[default_language] parameter.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 12/04/2024
The CVE-2011-0506 vulnerability represents a critical directory traversal flaw within the Ax Developer CMS version 0.1.1 that exposes the application to remote code execution attacks. This vulnerability specifically affects the modules/profile/user.php component where the application fails to properly validate user input parameters. The flaw occurs when the aXconf[default_language] parameter receives input containing directory traversal sequences such as .. (dot dot) characters, which allows attackers to manipulate the application's file access mechanisms. The vulnerability stems from insufficient input sanitization and improper path validation within the CMS's configuration handling routines, creating a pathway for attackers to navigate outside the intended directory structure and access arbitrary files on the server.
The technical exploitation of this vulnerability follows a well-established pattern that aligns with CWE-22 - Improper Limitation of a Pathname to a Restricted Directory. Attackers can craft malicious requests that include directory traversal sequences in the default_language parameter, enabling them to traverse the file system hierarchy and potentially access sensitive configuration files, source code, or other system resources. When the CMS processes these malformed parameters, it fails to properly validate or sanitize the input before using it in file system operations, allowing the attacker to specify arbitrary file paths that bypass normal access controls. This vulnerability is particularly dangerous because it can be exploited remotely without requiring authentication, making it a prime target for automated exploitation tools.
The operational impact of CVE-2011-0506 extends beyond simple file access violations to encompass full system compromise capabilities. Successful exploitation can lead to remote code execution, allowing attackers to upload and execute malicious payloads, escalate privileges, or establish persistent backdoors within the compromised environment. The vulnerability affects the core functionality of the CMS by undermining its security boundaries and potentially exposing sensitive data stored within the application's file structure. Organizations running AxDCMS 0.1.1 are at significant risk of data breaches, system compromise, and potential regulatory violations if this vulnerability remains unpatched. The attack surface is particularly concerning as it affects a widely used content management system that may be deployed across multiple environments, amplifying the potential impact of a successful exploitation.
Mitigation strategies for this vulnerability should include immediate patching of the affected CMS version to address the directory traversal flaw in the user.php module. System administrators should implement input validation measures that strictly filter and sanitize all user-provided parameters, particularly those used in file system operations. Network-level protections such as web application firewalls can provide additional layers of defense by detecting and blocking malicious traversal sequences in incoming requests. The vulnerability demonstrates the importance of proper secure coding practices including parameter validation, input sanitization, and least privilege access controls as outlined in the OWASP Top Ten security principles. Organizations should also conduct comprehensive security assessments of their CMS installations to identify similar vulnerabilities in other components and ensure proper configuration management practices are implemented to prevent future exploitation attempts.