CVE-2007-6079 in bcoos
Summary
by MITRE
Directory traversal vulnerability in include/common.php in bcoos 1.0.10 allows remote attackers to include and execute arbitrary local files via a .. (dot dot) in the xoopsOption[pagetype] parameter to the default URI for modules/news/. NOTE: this can be leveraged by using legitimate product functionality to upload a file that contains the code, then including that file.
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Analysis
by VulDB Data Team • 10/11/2024
The vulnerability described in CVE-2007-6079 represents a critical directory traversal flaw within the bcoos content management system version 1.0.10. This vulnerability specifically affects the include/common.php file and operates through the xoopsOption[pagetype] parameter in the modules/news/ default URI. The flaw enables remote attackers to manipulate file inclusion mechanisms by exploiting the .. (dot dot) traversal sequence, which allows them to access arbitrary local files on the server. The vulnerability is particularly dangerous because it can be leveraged using legitimate product functionality, making it more difficult to detect and prevent.
The technical implementation of this vulnerability stems from inadequate input validation and sanitization within the bcoos system. When the xoopsOption[pagetype] parameter is processed without proper restrictions on directory traversal sequences, the application fails to validate whether the requested file path remains within the intended directory boundaries. This allows attackers to craft malicious requests that traverse up the directory structure using the .. notation, potentially accessing sensitive files such as configuration files, database credentials, or other system resources. The vulnerability 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 this vulnerability extends beyond simple file disclosure, as it provides attackers with the capability to execute arbitrary code on the target system. By combining the directory traversal with legitimate file upload functionality, attackers can upload malicious files containing malicious code and then include those files through the vulnerable parameter. This creates a complete code execution scenario that can lead to full system compromise, data theft, or service disruption. The vulnerability affects the core functionality of the bcoos platform and can result in unauthorized access to sensitive information, modification of system files, or complete takeover of the affected server.
Security mitigations for this vulnerability should focus on implementing proper input validation and sanitization mechanisms throughout the application. The system should enforce strict path validation to prevent directory traversal sequences from being processed, using techniques such as canonicalizing file paths and maintaining a whitelist of acceptable file paths. Additionally, the application should implement proper access controls to limit file upload capabilities and ensure that uploaded files cannot be directly included or executed without proper authorization. Organizations should also consider implementing web application firewalls and runtime application self-protection mechanisms to detect and prevent exploitation attempts. This vulnerability aligns with CWE-22 Directory Traversal and can be categorized under ATT&CK technique T1059 Command and Scripting Interpreter, specifically focusing on the execution of arbitrary code through file inclusion mechanisms. Regular security audits and input validation testing should be conducted to identify and remediate similar vulnerabilities in the application codebase.