CVE-2008-4528 in Personal Information Manager
Summary
by MITRE
Directory traversal vulnerability in notes.php in Phlatline s Personal Information Manager (pPIM) 1.01 allows remote attackers to include and execute arbitrary local files via a .. (dot dot) in the id parameter in an edit action.
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Analysis
by VulDB Data Team • 11/06/2024
The vulnerability identified as CVE-2008-4528 represents a critical directory traversal flaw within the Phlatline s Personal Information Manager version 1.01 web application. This issue resides in the notes.php script which processes user requests through an edit action mechanism. The vulnerability stems from inadequate input validation and sanitization of the id parameter, which is used to determine which note to edit within the application's file system. When a remote attacker submits a crafted request containing directory traversal sequences such as .. (dot dot) in the id parameter, the application fails to properly validate or sanitize this input before using it in file operations. This allows the attacker to manipulate the file path resolution logic and gain access to arbitrary local files on the server's file system. The vulnerability is classified under CWE-22 as "Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')" which is a well-documented weakness in web applications that handle file operations.
The operational impact of this vulnerability extends beyond simple information disclosure to potentially enable full system compromise through remote code execution. An attacker can leverage this flaw to include and execute arbitrary local files on the web server, which may include system configuration files, database credentials, or even malicious code uploaded by the attacker. The attack vector requires only a remote HTTP request with a specially crafted id parameter, making it particularly dangerous as it can be exploited from anywhere on the internet. This vulnerability directly maps to ATT&CK technique T1059.007 for "Command and Scripting Interpreter: PowerShell" and T1566.001 for "Phishing: Spearphishing Attachment" when considering how attackers might use this vulnerability to execute malicious payloads. The flaw essentially allows attackers to bypass normal file access controls and potentially escalate privileges within the application's operational context.
Mitigation strategies for CVE-2008-4528 must address the core input validation issues that enable the directory traversal attack. The most effective immediate solution involves implementing strict input validation and sanitization of all user-supplied parameters, particularly those used in file operations. The application should reject any input containing directory traversal sequences such as .. or %2e%2e, which represent URL-encoded dot dot sequences. Additionally, the application should implement proper path normalization and validation to ensure that all file operations occur within a designated safe directory. The system should employ absolute path resolution and avoid dynamic path construction based on user input. Organizations should also consider implementing web application firewalls to detect and block such attacks, as well as conducting thorough security code reviews to identify similar vulnerabilities in other components. Regular security updates and patch management practices should be enforced to prevent exploitation of known vulnerabilities, with particular attention to legacy applications that may contain such fundamental flaws in their design. The vulnerability demonstrates the critical importance of proper input validation and the principle of least privilege in web application security design.