CVE-2007-1040 in Xpression News
Summary
by MITRE
Directory traversal vulnerability in archives.php in Xpression News (X-News) 1.0.1 allows remote attackers to include arbitrary files or obtain sensitive information via a .. (dot dot) in the xnews-template parameter.
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Analysis
by VulDB Data Team • 08/24/2024
The vulnerability described in CVE-2007-1040 represents a classic directory traversal flaw within the Xpression News (X-News) content management system version 1.0.1. This issue specifically affects the archives.php script which processes user input through the xnews-template parameter without proper validation or sanitization. The vulnerability stems from the application's failure to adequately filter or restrict user-supplied input that contains directory traversal sequences such as .. (dot dot) characters. When an attacker submits a malicious payload containing these sequences in the xnews-template parameter, the application processes the input directly without proper boundary checks, allowing unauthorized access to files outside the intended directory structure.
This directory traversal 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. The flaw enables attackers to manipulate file access patterns and potentially retrieve sensitive information from the server's file system. The impact extends beyond simple information disclosure to include potential arbitrary code execution if the application processes included files as executable content. The vulnerability is particularly dangerous because it allows attackers to traverse up the directory hierarchy and access files that should normally be restricted, potentially exposing configuration files, database credentials, or other sensitive system information. This type of vulnerability is classified under the ATT&CK technique T1083 (File and Directory Discovery) and T1566 (Phishing with Malicious Attachments) as attackers can leverage such flaws to gain unauthorized access to system resources and escalate privileges.
The operational impact of this vulnerability is significant for any organization running X-News 1.0.1, as it provides a straightforward path for remote attackers to compromise the system. The vulnerability can be exploited without requiring authentication, making it particularly dangerous in publicly accessible web environments. An attacker could use this flaw to access sensitive files such as database connection strings, administrative credentials, or system configuration details that could lead to complete system compromise. The vulnerability also enables potential denial of service conditions if attackers can manipulate the application to access non-existent or system-critical files. Additionally, the flaw may allow for further exploitation through chained attacks where the initial information disclosure leads to more sophisticated attacks such as privilege escalation or lateral movement within the network infrastructure.
Mitigation strategies for CVE-2007-1040 should focus on implementing proper input validation and sanitization techniques. Organizations should immediately upgrade to a patched version of X-News or implement proper parameter validation that filters out directory traversal sequences before processing user input. The application should employ a whitelist approach for template parameters, only allowing predefined, safe template names rather than accepting arbitrary user input. Security headers and proper file access controls should be implemented to restrict access to sensitive files even if traversal attempts are successful. Additionally, the system should be configured with proper file permissions that prevent unauthorized access to system files and directories. Network-level protections such as web application firewalls should be deployed to detect and block malicious traversal attempts. Regular security audits and input validation testing should be conducted to identify similar vulnerabilities in other components of the application stack. The vulnerability demonstrates the critical importance of proper input validation and the principle of least privilege in web application security, as outlined in OWASP Top 10 and NIST cybersecurity frameworks.