CVE-2009-2398 in PHP-Sugar
Summary
by MITRE
Directory traversal vulnerability in test/index.php in PHP-Sugar 0.80 allows remote attackers to read arbitrary files via a ..// (dot dot slash slash) in the t parameter.
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Analysis
by VulDB Data Team • 07/31/2025
The vulnerability identified as CVE-2009-2398 represents a classic directory traversal flaw within the PHP-Sugar 0.80 web application framework. This security weakness resides in the test/index.php component where the application fails to properly validate user input before processing file operations. The vulnerability specifically manifests when the t parameter contains ..// sequences that allow attackers to navigate outside the intended directory structure and access arbitrary files on the server. Such directory traversal vulnerabilities fall 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 attacks.
The technical exploitation of this vulnerability occurs through the manipulation of the t parameter in the test/index.php script. When a remote attacker submits a crafted URL containing ..// sequences, the application processes these inputs without adequate sanitization or validation, allowing the attacker to traverse directories and potentially access sensitive files such as configuration files, database credentials, or other system resources that should remain protected. The flaw demonstrates a fundamental lack of input validation and proper file access controls within the PHP-Sugar framework, enabling attackers to bypass normal access restrictions that should prevent unauthorized file system access.
From an operational impact perspective, this vulnerability poses significant risks to web application security and data integrity. Attackers can leverage this weakness to extract confidential information, potentially including database connection strings, application configuration details, or even system files that could provide further attack vectors. The remote nature of the exploit means that attackers do not require local system access or physical presence, making the vulnerability particularly dangerous as it can be exploited from anywhere on the internet. This type of vulnerability directly impacts the confidentiality and integrity aspects of the CIA triad, as unauthorized data access and potential modification capabilities exist. The ATT&CK framework categorizes this as a privilege escalation technique under the T1059 category, specifically related to command and scripting interpreter usage for information gathering activities.
Mitigation strategies for CVE-2009-2398 should focus on implementing proper input validation and output encoding within the PHP-Sugar application. Developers should sanitize all user-supplied input, particularly parameters that influence file operations, by implementing strict whitelisting of acceptable values or by employing proper path normalization techniques that prevent directory traversal sequences from being processed. The application should validate that all file operations occur within designated directories and reject any input that attempts to navigate beyond these boundaries. Additionally, implementing proper access controls and least privilege principles can limit the damage potential even if such vulnerabilities exist. Security headers and proper error handling should also be implemented to prevent information leakage that could aid attackers in exploiting similar weaknesses. Regular security audits and code reviews should be conducted to identify and remediate similar path traversal vulnerabilities across the entire application stack.