CVE-2005-4172 in eFiction
Summary
by MITRE
eFiction 1.0, 1.1, and 2.0 allows remote attackers to obtain sensitive information via a direct request to storyblock.php without arguments, which leaks the full pathname in the resulting PHP error message.
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Analysis
by VulDB Data Team • 06/13/2019
The vulnerability described in CVE-2005-4172 represents a critical information disclosure flaw affecting eFiction versions 1.0, 1.1, and 2.0. This vulnerability stems from inadequate input validation and error handling within the storyblock.php script, which fails to properly validate or sanitize user input before processing. When an attacker submits a direct request to this script without providing required arguments, the application generates a PHP error message that inadvertently reveals the full server pathname. This type of vulnerability falls under the category of information exposure through error messages, which is classified as CWE-209 in the Common Weakness Enumeration framework. The exposure of absolute file paths represents a significant security risk as it provides attackers with detailed knowledge of the server's directory structure, potentially enabling further exploitation techniques.
The technical implementation of this vulnerability occurs when the storyblock.php script lacks proper argument validation mechanisms. PHP applications typically generate error messages when required parameters are missing or invalid, and in this case, the error handling routine is configured to display full pathnames in the error output. This behavior violates fundamental security principles of least privilege and defense in depth, as it provides attackers with sensitive system information that should remain hidden from external users. The vulnerability is particularly concerning because it requires no authentication or privileged access to exploit, making it an easy target for automated scanning tools and malicious actors. The error message disclosure occurs at the application layer, specifically within the PHP interpreter's error reporting mechanism, which is part of the broader category of insecure error handling practices.
From an operational impact perspective, this vulnerability creates substantial risk for affected systems and their users. The leaked pathname information can be used by attackers to map the server's file structure, identify potential attack vectors, and plan more sophisticated exploitation strategies. The disclosure of absolute paths may reveal the existence of sensitive directories, backup files, or configuration files that could contain additional vulnerabilities. This information leakage directly supports the attacker's reconnaissance phase and can significantly reduce the time and effort required to discover other potential weaknesses in the system. The vulnerability also violates several principles outlined in the MITRE ATT&CK framework, particularly those related to initial access and reconnaissance activities, where attackers often seek to gather information about target systems before executing more destructive actions. Organizations running affected versions of eFiction may find their systems vulnerable to cascading attacks that leverage this information disclosure as a stepping stone to more serious compromises.
The mitigation strategy for this vulnerability involves implementing proper input validation and error handling procedures within the affected application. System administrators should immediately update to the latest version of eFiction where this vulnerability has been patched, as the developers have likely implemented proper argument validation and error message sanitization. The fix should include configuring PHP to suppress detailed error messages in production environments and implementing custom error handling routines that do not expose system pathnames. Organizations should also implement proper logging and monitoring to detect attempts to exploit this vulnerability, as well as review their error handling configurations across all web applications to ensure similar issues are not present. The vulnerability demonstrates the importance of following secure coding practices and the principle of defense in depth, where multiple layers of security controls work together to protect against various types of attacks. Additionally, implementing web application firewalls and input validation rules can provide additional protection against this specific attack vector while maintaining system functionality.