CVE-2008-4361 in PowerPortal
Summary
by MITRE
Directory traversal vulnerability in PowerPortal 2.0.13 allows remote attackers to list and possibly read arbitrary files via a .. (dot dot) in the path parameter to the default URI.
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Analysis
by VulDB Data Team • 11/05/2024
The directory traversal vulnerability identified in PowerPortal 2.0.13 represents a critical security flaw that enables remote attackers to access unauthorized files on the affected system. This vulnerability specifically manifests through the manipulation of path parameters in the default URI, where the use of .. (dot dot) sequences allows attackers to navigate beyond the intended directory structure. The vulnerability falls under the CWE-22 category, which classifies directory traversal attacks as a fundamental weakness in input validation and access control mechanisms. Such flaws typically arise when applications fail to properly sanitize user-supplied input before using it in file system operations, creating pathways for malicious actors to access sensitive data.
The technical implementation of this vulnerability exploits the lack of proper input validation and path sanitization within the PowerPortal application's file handling routines. When a user submits a request containing directory traversal sequences in the path parameter, the application fails to properly validate or normalize the input before processing it against the file system. This allows attackers to craft requests that can traverse up the directory hierarchy and access files outside the intended application scope. The vulnerability is particularly dangerous because it can be exploited remotely without requiring authentication, making it accessible to any attacker who can reach the target system. The impact extends beyond simple file listing to potentially enabling full data exfiltration, especially when combined with other exploitation techniques or when the application has access to sensitive system files.
The operational impact of this vulnerability is severe and multifaceted, affecting both the confidentiality and integrity of the affected system. Remote attackers can potentially access configuration files, database credentials, application source code, and other sensitive information that should remain protected within the application's designated directories. The vulnerability's exploitation can lead to complete system compromise, especially when combined with other attack vectors or when the application runs with elevated privileges. From an att&ck framework perspective, this vulnerability maps to the T1083 (File and Directory Discovery) and T1566 (Phishing) techniques, as it enables attackers to discover and potentially exfiltrate sensitive data. The vulnerability also aligns with the T1213 (Data from Information Repositories) tactic, as it allows unauthorized access to repository contents that should be protected.
Organizations affected by this vulnerability should implement immediate mitigations including input validation and sanitization of all user-supplied path parameters, implementing proper path normalization techniques, and restricting file system access to only necessary directories. The recommended remediation strategy involves implementing a whitelist approach for valid file paths, ensuring that all input is validated against a predetermined set of acceptable values. Additionally, the application should employ proper access controls and privilege separation to limit the damage that could occur if such vulnerabilities are exploited. Security teams should also consider implementing web application firewalls to detect and block suspicious path traversal attempts. The vulnerability highlights the importance of following secure coding practices and conducting regular security assessments to identify and remediate similar weaknesses in application code. This incident serves as a reminder of the critical need for robust input validation and the principle of least privilege in application design, particularly for web applications that handle file system operations.