CVE-2006-6386 in Cvs Management And Tracker
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in the CVS management/tracker 4.7.x-1.0, 4.7.x-2.0, and 4.7.0 (before the 20060807 contribution release system) for Drupal allows remote attackers to inject arbitrary web script or HTML via the motivation field in the CVS application page, which is not passed through check_markup on display.
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Analysis
by VulDB Data Team • 03/12/2015
The vulnerability identified as CVE-2006-6386 represents a critical cross-site scripting flaw within the CVS management/tracker module for Drupal versions 4.7.x-1.0, 4.7.x-2.0, and 4.7.0 prior to the 20060807 contribution release. This security weakness resides in the application's handling of user input within the motivation field of the CVS application page, creating an exploitable vector for remote attackers to inject malicious web scripts or HTML content. The vulnerability stems from inadequate input sanitization and validation mechanisms that fail to properly process or escape user-supplied data before rendering it on web pages, directly violating fundamental web security principles and establishing a pathway for persistent cross-site scripting attacks.
The technical flaw manifests when user input from the motivation field bypasses the expected check_markup filtering process during display operations. This particular module version fails to implement proper markup sanitization routines that would normally convert potentially dangerous characters and script tags into harmless text representations. The absence of input validation and output escaping creates a condition where malicious actors can embed script code within the motivation field, which then executes in the context of other users' browsers when the content is displayed. This vulnerability aligns with CWE-79, which specifically addresses cross-site scripting flaws where untrusted data is improperly handled during web page generation, and represents a classic example of unsafe output encoding practices that have been consistently documented in web application security frameworks.
The operational impact of this vulnerability extends beyond simple data corruption or user inconvenience, as it enables attackers to execute arbitrary scripts within the context of affected users' browsers, potentially leading to session hijacking, credential theft, or redirection to malicious sites. Remote attackers can exploit this weakness without requiring authentication, making it particularly dangerous in environments where the CVS module is accessible to unauthenticated users. The vulnerability affects not only the immediate functionality of the CVS application but also compromises the overall security posture of the Drupal installation by providing a foothold for more sophisticated attacks. Attackers could leverage this vulnerability to manipulate user sessions, steal sensitive information, or even escalate privileges within the application environment, particularly when combined with other exploitation techniques that follow the ATT&CK framework's approach to privilege escalation and credential access.
Mitigation strategies for this vulnerability involve implementing proper input validation and output escaping mechanisms that ensure all user-supplied data undergoes sanitization before being rendered in web pages. The most effective immediate fix requires updating to the patched version released after August 7, 2006, which would include proper check_markup processing for the affected fields. Additionally, administrators should implement content security policies that limit script execution permissions, apply input sanitization filters that remove or encode dangerous characters, and establish proper output encoding practices that prevent script injection during display operations. Organizations should also consider implementing web application firewalls and regular security audits to detect similar vulnerabilities in other modules and custom code implementations, as this type of flaw demonstrates the importance of consistent security practices throughout the entire application stack and aligns with security frameworks that emphasize the need for defense in depth approaches to web application security.