CVE-2004-1212 in Blog Torrent Preview
Summary
by MITRE
Directory traversal vulnerability in btdownload.php in Blog Torrent preview 0.8 allows remote attackers to download arbitrary files via a .. (dot dot) in the file argument.
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Analysis
by VulDB Data Team • 02/11/2025
The vulnerability identified as CVE-2004-1212 represents a classic directory traversal flaw in the Blog Torrent preview version 0.8 software. This type of vulnerability falls under the common weakness enumeration CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. The vulnerability exists within the btdownload.php script that processes file arguments without proper validation or sanitization, creating an opportunity for malicious actors to access files outside the intended directory structure.
The technical implementation of this vulnerability stems from insufficient input validation in the file parameter processing within the btdownload.php script. When users provide file arguments containing directory traversal sequences such as .. or %2e%2e, the application fails to properly sanitize or restrict these inputs before using them to construct file paths. This allows attackers to manipulate the file access mechanism and navigate to arbitrary locations within the file system, potentially accessing sensitive files including configuration data, source code, or other restricted resources that should not be publicly accessible.
The operational impact of this vulnerability is significant as it provides remote attackers with unauthorized access to the underlying file system of the affected server. Attackers can leverage this weakness to download sensitive files that may contain database credentials, application configuration details, or even source code that could reveal additional vulnerabilities. The remote nature of the attack means that exploitation does not require local system access or authentication, making it particularly dangerous as it can be exploited from any location on the internet. This vulnerability essentially undermines the fundamental security principle of least privilege by allowing unrestricted file access through a single vulnerable parameter.
Mitigation strategies for this vulnerability should focus on implementing proper input validation and sanitization mechanisms. The most effective approach involves implementing strict path validation that ensures file paths remain within the intended directory boundaries. This can be achieved through techniques such as canonicalizing file paths, implementing whitelist validation for allowed file extensions, and using secure file access libraries that prevent path traversal sequences. Organizations should also consider implementing proper access controls and privilege separation to limit the impact of any potential exploitation. Additionally, regular security audits and code reviews should be conducted to identify similar vulnerabilities in other applications and scripts within the system. The ATT&CK framework categorizes this type of vulnerability under T1083 - File and Directory Discovery as part of the reconnaissance phase, making it a critical target for defensive measures to prevent unauthorized information disclosure and potential further compromise of the affected system.