CVE-2008-3046 in Packman Extension
Summary
by MITRE
Incomplete blacklist vulnerability in the Packman (kb_packman) extension 0.2.1 and earlier for TYPO3 has unknown impact and attack vectors.
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Analysis
by VulDB Data Team • 11/20/2017
The CVE-2008-3046 vulnerability represents a critical security flaw in the Packman extension for TYPO3 content management systems, specifically affecting versions 0.2.1 and earlier. This vulnerability stems from an incomplete blacklist implementation that fails to properly validate file uploads or access requests within the TYPO3 environment. The Packman extension, designed to manage package installations and updates, contains a security mechanism that relies on a blacklist approach to restrict potentially malicious file types or access patterns. However, the implementation proves insufficient in properly identifying and blocking all dangerous file extensions or access vectors.
The technical nature of this vulnerability falls under the category of incomplete input validation and access control mechanisms, which aligns with CWE-20 - Improper Input Validation and CWE-284 - Improper Access Control. The flaw occurs when the extension's blacklist mechanism fails to account for various encoding techniques, alternative extensions, or bypass methods that attackers might employ to circumvent the security restrictions. This incomplete validation creates a pathway for unauthorized access or execution of malicious code within the TYPO3 environment, potentially allowing attackers to upload harmful files or execute arbitrary commands.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it can enable attackers to escalate privileges and gain deeper system control within the TYPO3 installation. Attackers could potentially exploit this weakness to upload malicious scripts, modify existing files, or manipulate the content management system's functionality in ways that compromise the entire website or application. The unknown attack vectors associated with this vulnerability make it particularly dangerous as security teams cannot predict all possible exploitation methods, leading to a broader surface area for potential attacks. This type of vulnerability directly impacts the integrity and availability of web applications built on TYPO3, potentially leading to complete system compromise.
Organizations using affected TYPO3 versions should immediately implement mitigations including upgrading to patched versions of the Packman extension, implementing additional access controls, and conducting thorough security audits of their TYPO3 installations. The vulnerability demonstrates the critical importance of robust input validation and access control mechanisms in web applications, particularly in content management systems that handle sensitive data and user interactions. Security professionals should also consider implementing network-based intrusion detection systems to monitor for suspicious activities that might indicate exploitation attempts. This vulnerability serves as a reminder of the necessity for comprehensive security testing and the dangers of relying solely on blacklist-based security mechanisms without proper validation and sanitization processes.