CVE-2008-1555 in BolinOS
Summary
by MITRE
Directory traversal vulnerability in system/_b/contentFiles/gbincluder.php in BolinOS 4.6.1 allows remote attackers to include and execute arbitrary local files via a .. (dot dot) in the _bFileToInclude parameter.
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Analysis
by VulDB Data Team • 10/20/2024
The vulnerability identified as CVE-2008-1555 represents a critical directory traversal flaw within the BolinOS 4.6.1 content management system. This vulnerability exists in the gbincluder.php script located in the system/_b/contentFiles/ directory structure, where the application fails to properly validate user-supplied input before using it to include local files. The flaw specifically manifests when the _bFileToInclude parameter contains directory traversal sequences such as .. (dot dot), which allows attackers to manipulate the file inclusion mechanism and access arbitrary local files on the server. This type of vulnerability falls 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 when a remote attacker crafts a malicious request containing directory traversal sequences in the _bFileToInclude parameter. When the vulnerable application processes this input without proper sanitization, it can be tricked into including and executing local files that are outside the intended directory scope. This allows attackers to potentially access sensitive system files, configuration data, or even execute arbitrary code on the server. The vulnerability is particularly dangerous because it can be leveraged to bypass normal access controls and gain unauthorized access to the underlying file system. The ATT&CK framework categorizes this as a privilege escalation technique under the T1059 category, which involves executing code through various means including file inclusion vulnerabilities.
The operational impact of CVE-2008-1555 extends beyond simple information disclosure, as it can enable full system compromise when combined with other attack vectors. An attacker who successfully exploits this vulnerability can potentially access database configuration files, user credentials, system logs, and other sensitive data stored on the server. The vulnerability also poses a significant risk to the availability and integrity of the web application, as attackers could potentially upload malicious files or modify existing system files. Organizations running BolinOS 4.6.1 are particularly vulnerable since this was a known issue in the specific version mentioned, and the flaw demonstrates poor input validation practices that are common in legacy web applications. The attack surface is further expanded by the fact that this vulnerability can be exploited remotely without requiring any prior authentication, making it an attractive target for automated exploitation tools.
Mitigation strategies for CVE-2008-1555 should focus on implementing proper input validation and sanitization mechanisms to prevent directory traversal attacks. Organizations should immediately upgrade to a patched version of BolinOS or apply the relevant security patches provided by the vendor. The implementation of a whitelist-based approach for file inclusion, where only predefined safe file paths are allowed, provides a robust defense against such attacks. Additionally, developers should employ proper parameter validation techniques that reject any input containing directory traversal sequences, and implement strict access controls that limit file system access to only necessary components. Security monitoring should include detection of suspicious file inclusion patterns in web server logs, and network segmentation can help limit the potential impact of successful exploitation attempts. The vulnerability also highlights the importance of regular security assessments and the need for secure coding practices that prevent common flaws like improper input validation and inadequate access controls.