CVE-2008-0905 in globsy
Summary
by MITRE
Directory traversal vulnerability in globsy_edit.php in Globsy 1.0 allows remote attackers to read arbitrary files via a .. (dot dot) in the file parameter.
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Analysis
by VulDB Data Team • 10/17/2024
The vulnerability identified as CVE-2008-0905 represents a classic directory traversal flaw within the globsy_edit.php component of the Globsy 1.0 web application. This security weakness stems from inadequate input validation mechanisms that fail to properly sanitize user-supplied data before processing file operations. The vulnerability specifically affects the file parameter handling within the application's editing functionality, creating an exploitable condition where remote attackers can manipulate file paths to access unauthorized system resources. The flaw enables attackers to navigate beyond the intended directory structure through the use of directory traversal sequences such as .. (dot dot) in the file parameter, thereby compromising the application's file access controls.
The technical implementation of this vulnerability aligns with CWE-22, which describes improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. The flaw occurs when the application directly incorporates user input into file system operations without adequate validation or sanitization. In the context of web applications, this typically manifests when user-supplied parameters are used to construct file paths without proper canonicalization or filtering of special characters. The globsy_edit.php script likely accepts a file parameter and uses it directly in file system operations, creating an opportunity for attackers to manipulate the path resolution process. This vulnerability falls under the broader category of insecure file handling practices that have been consistently identified as critical security flaws in web applications.
The operational impact of CVE-2008-0905 extends beyond simple information disclosure, as it provides attackers with the capability to access arbitrary files on the target system. This can include sensitive configuration files, database credentials, application source code, and other confidential data that may be stored within the application's directory structure. The remote nature of the attack means that exploitation does not require physical access to the system, making it particularly dangerous for web applications that are publicly accessible. Attackers can leverage this vulnerability to gain insights into the application's architecture, potentially identifying additional attack vectors or system weaknesses. The vulnerability also enables potential privilege escalation scenarios where attackers might access files with elevated permissions, depending on the application's file system permissions and the operating system configuration.
Mitigation strategies for this vulnerability must address both the immediate security gap and implement comprehensive input validation controls. The primary remediation involves implementing strict input validation and sanitization for all user-supplied parameters, particularly those used in file system operations. Applications should employ absolute path resolution techniques that prevent traversal sequences from affecting the intended file access behavior. The implementation of a whitelist-based approach for file access, where only predetermined valid file paths are allowed, provides an effective defense mechanism against such attacks. Additionally, the application should enforce proper file system permissions and ensure that the web application runs with minimal required privileges to limit potential damage from successful exploitation attempts. Security practitioners should also consider implementing web application firewalls and intrusion detection systems that can monitor for suspicious path traversal patterns. The vulnerability serves as a reminder of the critical importance of secure coding practices and the necessity of validating all user inputs against known good patterns to prevent path traversal attacks. Organizations should conduct regular security assessments and code reviews to identify similar vulnerabilities in their applications, as this type of flaw has been consistently documented in numerous security advisories and represents a fundamental weakness in application security design principles.