CVE-2008-6012 in Pritlog
Summary
by MITRE
Directory traversal vulnerability in index.php in Pritlog 0.4 and earlier, when magic_quotes_gpc is disabled, allows remote attackers to read arbitrary files via a .. (dot dot) in the filename parameter in a viewEntry action.
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Analysis
by VulDB Data Team • 11/05/2024
The vulnerability identified as CVE-2008-6012 represents a critical directory traversal flaw in the Pritlog blogging platform version 0.4 and earlier. This security weakness specifically affects systems where the PHP configuration parameter magic_quotes_gpc is disabled, creating an exploitable condition that enables remote attackers to access arbitrary files on the server. The vulnerability manifests within the index.php script during the viewEntry action when processing filename parameters, allowing malicious actors to manipulate file paths through the use of .. (dot dot) sequences in the input data.
The technical nature of this vulnerability aligns with CWE-22, which defines improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. The flaw occurs because the application fails to properly validate and sanitize user-supplied input before using it in file operations. When magic_quotes_gpc is disabled, the application does not automatically escape special characters in GET, POST, and COOKIE data, leaving the system exposed to malicious input manipulation. Attackers can exploit this by appending directory traversal sequences such as ../../etc/passwd or ../../../windows/system32/drivers/etc/hosts to the filename parameter, effectively bypassing normal file access controls and gaining unauthorized access to sensitive system files.
The operational impact of this vulnerability extends beyond simple file reading capabilities, as it can potentially allow attackers to access configuration files, database credentials, application source code, and other sensitive information stored on the server. This exposure creates a significant risk for systems running Pritlog 0.4 or earlier versions, particularly when deployed in production environments where sensitive data may be stored within the application's directory structure. The vulnerability can be exploited through standard web browser interactions, requiring no special tools or privileges beyond basic network access to the affected web application, making it particularly dangerous for widespread exploitation.
From a threat modeling perspective, this vulnerability maps to several ATT&CK techniques including T1083 (File and Directory Discovery) and T1566 (Phishing with Malicious Attachments), as attackers can use this weakness to discover and extract sensitive files from the target system. The attack chain typically begins with reconnaissance to identify the vulnerable application, followed by crafting malicious payloads with directory traversal sequences, and concludes with successful file access and potential data exfiltration. Organizations should consider implementing input validation mechanisms, restricting file access permissions, and ensuring that magic_quotes_gpc is properly configured to prevent such vulnerabilities from being exploited in the future. The remediation strategy involves upgrading to a patched version of Pritlog, implementing proper input sanitization, and applying the principle of least privilege to web application file access controls.
The broader implications of this vulnerability demonstrate the critical importance of proper input validation and secure coding practices in web applications. Systems administrators and developers should prioritize regular security assessments and vulnerability scanning to identify similar weaknesses in their web applications. The vulnerability also highlights the risks associated with legacy software systems that may not receive regular security updates, emphasizing the need for comprehensive application lifecycle management and security patching processes. Organizations should implement web application firewalls and intrusion detection systems to monitor for suspicious file access patterns that may indicate exploitation attempts.