CVE-2006-3230 in Azureus Tracker
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in index.tmpl in Azureus Tracker 2.4.0.2 and earlier (Java BitTorrent Client Tracker) allows remote attackers to inject arbitrary web script or HTML via the search parameter.
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Analysis
by VulDB Data Team • 09/17/2017
The CVE-2006-3230 vulnerability represents a critical cross-site scripting flaw in the Azureus Tracker component of the Java BitTorrent Client ecosystem. This vulnerability specifically affects versions 2.4.0.2 and earlier, creating a dangerous attack vector that enables remote adversaries to execute malicious web scripts or HTML code within the context of affected users' browsers. The flaw manifests through improper input validation and sanitization of the search parameter within the index.tmpl template file, which serves as the primary user interface for tracker functionality.
The technical implementation of this vulnerability stems from the tracker's failure to properly escape or filter user-supplied input before rendering it within the web interface. When users submit search queries through the tracker's web-based interface, the application processes these inputs without adequate sanitization measures, allowing attackers to inject malicious payloads that persistently execute within the victim's browser environment. This type of vulnerability falls under the CWE-79 category of Cross-Site Scripting, specifically representing a reflected XSS attack where malicious code is reflected back to users through the vulnerable parameter handling mechanism.
The operational impact of this vulnerability extends beyond simple script execution, as it creates a persistent threat vector that can be exploited for various malicious activities. Attackers can leverage this weakness to steal session cookies, perform unauthorized actions on behalf of users, redirect victims to malicious websites, or even establish persistent backdoors within the affected environment. The tracker component, being integral to BitTorrent network operations, provides attackers with access to potentially sensitive metadata about torrent files and user activities, making this vulnerability particularly dangerous for organizations relying on BitTorrent infrastructure for legitimate file sharing operations.
From a cybersecurity perspective, this vulnerability aligns with ATT&CK technique T1566.001 which covers "Phishing: Spearphishing Attachment" and T1566.002 which addresses "Phishing: Spearphishing Link" as attackers can craft malicious search queries that, when clicked by unsuspecting users, execute harmful scripts. The attack chain typically involves crafting a malicious search parameter containing script tags or other HTML elements that get rendered in the vulnerable tracker interface. The exploitation process requires minimal technical skill, making it particularly dangerous as it can be easily weaponized by threat actors without advanced technical knowledge. Organizations using affected versions of Azureus Tracker should immediately implement mitigations including input validation, output encoding, and application-level protections to prevent unauthorized code execution within user browsers.
Mitigation strategies for CVE-2006-3230 should focus on implementing comprehensive input validation and output encoding mechanisms throughout the application stack. The most effective remediation involves upgrading to patched versions of the Azureus Tracker software, which would include proper HTML escaping for all user-supplied parameters. Organizations should also implement web application firewalls to detect and block suspicious search queries, employ content security policies to restrict script execution, and conduct regular security assessments of their BitTorrent infrastructure. Additionally, user education regarding the dangers of clicking suspicious links or entering untrusted search parameters can provide an additional layer of defense against exploitation attempts. The vulnerability demonstrates the critical importance of secure coding practices and proper input sanitization in web applications, particularly those handling user-generated content within public-facing interfaces.