CVE-2007-6129 in Amber Script
Summary
by MITRE
Directory traversal vulnerability in scripts/include/show_content.php in Amber Script 1.0 allows remote attackers to include and execute arbitrary local files via a .. (dot dot) in the id parameter. NOTE: in some environments, this can be leveraged for remote file inclusion by using a UNC share pathname or an ftp, ftps, or ssh2.sftp URL.
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Analysis
by VulDB Data Team • 10/11/2024
The vulnerability identified as CVE-2007-6129 represents a critical directory traversal flaw within the Amber Script 1.0 web application framework. This security weakness exists in the show_content.php script located within the scripts/include directory structure, where the application fails to properly validate user input before processing file inclusion requests. The vulnerability specifically manifests when the id parameter contains directory traversal sequences using the .. (dot dot) notation, allowing attackers to manipulate the file inclusion mechanism to access arbitrary local files on the server.
The technical exploitation of this vulnerability stems from insufficient input sanitization and validation mechanisms within the application's file handling logic. When the application processes the id parameter without proper restrictions, it becomes susceptible to path traversal attacks that can bypass normal file access controls. The flaw operates by allowing attackers to specify file paths that traverse upward through the directory structure, potentially accessing sensitive files such as configuration files, database credentials, or system files that should remain protected from unauthorized access. This vulnerability directly maps to CWE-22, which describes improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks.
The operational impact of this vulnerability extends beyond simple file disclosure, as it can be leveraged for more sophisticated attacks depending on the server environment and available resources. In certain configurations, attackers can exploit this weakness to achieve remote file inclusion by utilizing Universal Naming Convention (UNC) share pathnames or protocols such as ftp, ftps, or ssh2.sftp URLs. This extension of the attack vector transforms what might initially appear as a local file inclusion vulnerability into a more dangerous remote code execution potential. The attack chain typically involves crafting malicious input that first traverses to a system file, then uses the file inclusion mechanism to execute code, potentially leading to full system compromise.
The implications of this vulnerability align with several ATT&CK framework techniques including T1059 for command and scripting interpreter, T1078 for valid accounts, and T1566 for phishing with malicious attachments. Organizations running Amber Script 1.0 are particularly vulnerable to attacks that could result in data breaches, system compromise, and unauthorized access to sensitive information. The vulnerability's severity is amplified by the fact that it requires minimal skill to exploit and can be automated, making it attractive to both automated scanning tools and targeted attackers. Security professionals should consider implementing input validation, proper access controls, and regular security assessments to mitigate the risk associated with this type of directory traversal vulnerability.
Organizations should implement comprehensive mitigations including strict input validation, removal of unnecessary file inclusion functionality, and implementation of proper access controls to prevent unauthorized file access. The use of secure coding practices such as whitelisting allowed files, implementing proper path normalization, and employing security libraries designed to prevent path traversal attacks should be prioritized. Additionally, network segmentation and monitoring systems should be deployed to detect and prevent exploitation attempts, while regular security updates and patches should be applied to address known vulnerabilities in web application frameworks.