CVE-2012-1634 in Video Filter
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in video_filter.codecs.inc in the Video Filter module 6.x-2.x and 7.x-2.x for Drupal allows remote attackers to inject arbitrary web script or HTML via the EMBEDLOOKUP parameter for Blip.tv links.
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Analysis
by VulDB Data Team • 12/14/2021
The vulnerability identified as CVE-2012-1634 represents a critical cross-site scripting flaw within the Video Filter module for Drupal content management systems. This security weakness affects versions 6.x-2.x and 7.x-2.x of the Video Filter module, creating a significant risk for web applications that rely on Drupal's multimedia content handling capabilities. The vulnerability specifically manifests when processing Blip.tv links through the EMBEDLOOKUP parameter, which is used to embed video content from the Blip.tv platform into Drupal websites. The flaw allows remote attackers to inject malicious web scripts or HTML code directly into the application's response, potentially compromising user sessions and enabling further exploitation.
The technical implementation of this vulnerability stems from insufficient input validation and output sanitization within the video_filter.codecs.inc file. When the Video Filter module processes video URLs from Blip.tv, it fails to properly escape or filter the EMBEDLOOKUP parameter values before incorporating them into the generated HTML output. This lack of proper sanitization creates an opening for attackers to inject malicious payloads that will execute in the context of other users' browsers. The vulnerability operates under CWE-79 which classifies it as a classic cross-site scripting weakness, where the application fails to validate or escape user-controllable data before rendering it in web pages. The attack vector is particularly concerning because it leverages legitimate video embedding functionality, making it difficult for administrators to detect malicious activity while the system appears to function normally.
The operational impact of this vulnerability extends beyond simple script injection, creating potential pathways for more sophisticated attacks within affected Drupal installations. An attacker who successfully exploits this vulnerability could execute arbitrary JavaScript code in the browser of any user who views the compromised page, potentially leading to session hijacking, credential theft, or redirection to malicious sites. The vulnerability affects not only the immediate execution environment but also the broader security posture of Drupal-based websites, particularly those that rely heavily on user-generated content or community features. Given that Drupal is widely used for enterprise and government applications, the potential for widespread impact increases significantly. This weakness aligns with ATT&CK technique T1566 which describes social engineering tactics that leverage web-based vulnerabilities to compromise user systems, and T1059 which covers execution through script interpreters, demonstrating how this vulnerability could serve as a launching point for additional attacks.
Organizations affected by this vulnerability should prioritize immediate remediation through patching the Video Filter module to version 6.x-2.1 or 7.x-2.1, which contain the necessary security fixes. System administrators should implement input validation measures at the application level to prevent malicious parameters from being processed, while also considering web application firewalls as additional protective layers. The vulnerability highlights the importance of thorough security testing for third-party modules and the need for regular security audits of Drupal installations. Security teams should monitor for exploitation attempts through network traffic analysis and web server logs, as the malicious payloads may contain indicators of compromise that can be detected by security monitoring systems. Regular updates to all Drupal core components and contributed modules remain essential for maintaining security posture, as this vulnerability demonstrates how seemingly benign functionality can become a vector for serious security breaches when proper input validation is absent.