CVE-2008-5644 in TYPO3
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in the file backend module in TYPO3 4.2.2 allows remote attackers to inject arbitrary web script or HTML via unknown vectors.
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Analysis
by VulDB Data Team • 10/22/2018
The CVE-2008-5644 vulnerability represents a critical cross-site scripting flaw within TYPO3's backend file management module version 4.2.2, exposing organizations to significant web application security risks. This vulnerability specifically affects the backend interface of the TYPO3 content management system, which serves as a crucial administrative component for managing website content and configurations. The flaw arises from insufficient input validation and output encoding mechanisms within the file module's processing logic, creating an avenue for malicious actors to execute arbitrary web scripts or HTML code within the context of authenticated user sessions. The vulnerability's impact extends beyond simple data theft, as it can enable attackers to manipulate backend operations, escalate privileges, and potentially compromise entire web applications. The attack vector remains unspecified in the original description, which suggests that the vulnerability may be present in multiple input handling scenarios within the file module's backend interface.
The technical nature of this XSS vulnerability aligns with CWE-79, which defines cross-site scripting as a weakness where untrusted data is sent to a web browser without proper validation or encoding, allowing malicious scripts to execute. This particular flaw operates at the application layer and requires minimal privileges to exploit, as it targets the backend administrative interface where users typically possess elevated permissions. The vulnerability's exploitation potential is amplified by the fact that it affects the backend module, meaning that successful attacks could allow adversaries to manipulate file operations, potentially leading to unauthorized file uploads, deletion of critical system files, or modification of existing content. The attack requires no special privileges beyond basic authentication access to the TYPO3 backend, making it particularly dangerous for organizations with inadequate security controls.
The operational impact of CVE-2008-5644 extends far beyond simple script injection, as it can serve as a foothold for more sophisticated attacks within the TYPO3 environment. An attacker who successfully exploits this vulnerability could gain access to sensitive backend functionality, potentially leading to complete system compromise if the backend user has administrative privileges. The vulnerability's presence in the file management module creates opportunities for attackers to upload malicious files, modify existing system files, or manipulate the content management workflow. This could result in data exfiltration, service disruption, or the establishment of persistent backdoors within the web application infrastructure. The attack could also be leveraged to perform session hijacking, allowing adversaries to maintain access to the backend interface beyond the initial exploitation event.
Organizations should implement immediate mitigations to address this vulnerability, including applying the official TYPO3 security patches released for version 4.2.2 and subsequent releases. The recommended approach involves ensuring proper input validation and output encoding for all user-supplied data within the backend file module, implementing Content Security Policy headers to limit script execution, and conducting thorough security reviews of all backend interfaces. Additionally, organizations should consider implementing web application firewalls to detect and block suspicious script injection attempts, while maintaining regular security assessments to identify similar vulnerabilities in other components of their web infrastructure. The remediation process should also include user access reviews to ensure that backend privileges are properly restricted and that the principle of least privilege is maintained across all administrative interfaces. Security teams should also monitor for exploitation attempts through log analysis and implement proper logging mechanisms to track file operations within the backend system.