CVE-2008-0479 in NewsPad
Summary
by MITRE
Directory traversal vulnerability in RTE_file_browser.asp in Web Wiz NewsPad 1.02 allows remote attackers to list arbitrary directories, and .txt and .zip files, via a .....\\\ in the sub parameter.
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Analysis
by VulDB Data Team • 10/14/2024
The CVE-2008-0479 vulnerability represents a critical directory traversal flaw in the Web Wiz NewsPad 1.02 web application, specifically within the RTE_file_browser.asp component. This vulnerability enables remote attackers to bypass normal access controls and enumerate arbitrary directories on the server filesystem. The flaw manifests through the manipulation of the sub parameter in the file browser functionality, where attackers can craft malicious input sequences using multiple backslash characters to navigate beyond the intended directory boundaries. The vulnerability specifically allows for listing directory contents and accessing sensitive files with txt and zip extensions, potentially exposing confidential information stored on the server.
The technical implementation of this vulnerability stems from inadequate input validation and sanitization within the Web Wiz NewsPad application's file browsing functionality. When the application processes the sub parameter without proper restriction or canonicalization of directory paths, it fails to prevent traversal sequences such as .....\\ that would normally be rejected by standard file system operations. This weakness creates a path traversal condition that allows attackers to access files outside the designated web root directory. The vulnerability aligns with CWE-22, which describes improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal. The flaw operates at the application layer and can be exploited through HTTP requests without requiring authentication, making it particularly dangerous for publicly accessible web applications.
The operational impact of CVE-2008-0479 extends beyond simple directory enumeration, as it provides attackers with potential access to sensitive server files that may contain configuration data, user information, application source code, or other confidential materials. When combined with the ability to list .txt and .zip files, this vulnerability could enable attackers to discover and download critical information that could be used for further exploitation or lateral movement within the network infrastructure. The vulnerability directly violates security principles of least privilege and principle of least privilege, as it allows unauthorized access to server resources that should remain protected. Attackers could leverage this access to gain insights into the application architecture, discover other vulnerabilities, or extract sensitive data that could compromise the entire system. This type of vulnerability is particularly concerning in web applications where the file browser functionality is exposed to unauthenticated users.
Mitigation strategies for CVE-2008-0479 should focus on implementing robust input validation and sanitization mechanisms within the Web Wiz NewsPad application. Organizations should immediately apply the vendor-provided patch or upgrade to a newer version of the software that addresses this directory traversal vulnerability. System administrators should implement proper directory path validation by canonicalizing all user-supplied input and rejecting any attempts to traverse directories using special sequences such as backslashes or dot-dot sequences. The implementation of a whitelist-based approach for file access, where only predetermined directories and file types are allowed, provides an additional layer of protection against similar vulnerabilities. Network segmentation and access control measures should be enforced to limit the potential impact of successful exploitation. Additionally, security monitoring and logging should be implemented to detect and respond to suspicious file access patterns. This vulnerability demonstrates the importance of following secure coding practices and adhering to the principle of input validation, as outlined in various security frameworks including those referenced in the MITRE ATT&CK framework for web application attacks. Organizations should conduct regular security assessments and vulnerability scanning to identify similar path traversal vulnerabilities in other applications within their infrastructure.