CVE-2006-3539 in Dragons Kingdom Script
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in DKScript.com Dragon s Kingdom Script 1.0 allow remote attackers to inject arbitrary web script or HTML via a javascript URI in the SRC attribute of an IMG element in the (1) Subject and (2) Message fields in a do=write (aka Send Mail Message) action in gamemail.php; the (3) Gender, (4) Country/Location, (5) MSN Messenger, (6) AOL Instant Messenger, (7) Yahoo Instant Messenger, and (8) ICQ fields in a do=onlinechar (aka Edit your Profile) action in index.php, as accessed by dk.php; a javascript URI in the SRC attribute of an IMG element in the (9) Title and (10) Message fields in a do=new (aka Create Thread) action in general.php; and a javascript URI in the SRC attribute of an IMG element in unspecified fields in (11) other Forum posts and (12) Forum replies.
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Analysis
by VulDB Data Team • 09/18/2017
The vulnerability described in CVE-2006-3539 represents a critical cross-site scripting flaw affecting the Dragon s Kingdom Script 1.0 web application developed by DKScript.com. This vulnerability stems from inadequate input validation and sanitization mechanisms within the application's handling of user-supplied data across multiple interactive components. The flaw specifically manifests when the application processes image source attributes containing javascript URIs, creating an avenue for malicious actors to inject arbitrary web scripts and HTML content into the application's output streams. The vulnerability spans across multiple functional areas including email messaging, user profile management, and forum posting systems, indicating a systemic weakness in the application's data sanitization protocols.
The technical exploitation of this vulnerability occurs through the manipulation of the SRC attribute within IMG elements, where attackers can embed javascript URIs that execute malicious code when processed by the vulnerable application. This particular attack vector leverages the inherent trust users place in image loading mechanisms, as browsers automatically process SRC attributes without sufficient validation. The vulnerability affects both server-side and client-side processing contexts, as the malicious javascript code executes in the victim's browser context upon page rendering. The flaw's persistence across multiple application modules suggests that the underlying sanitization logic was not properly implemented or consistently applied throughout the codebase, creating multiple attack surfaces for potential exploitation.
The operational impact of this vulnerability extends beyond simple script injection, as it enables attackers to perform session hijacking, steal user credentials, redirect victims to malicious sites, and potentially escalate privileges within the application environment. The vulnerability affects user profile data, forum communications, and email functionality, creating a comprehensive attack surface that could compromise user privacy and application integrity. Users with elevated privileges may face additional risks as the vulnerability could potentially be leveraged to manipulate application data or gain unauthorized access to administrative functions. The widespread nature of the vulnerability across multiple modules indicates that a single exploitation attempt could yield multiple attack vectors, making it particularly dangerous for application administrators to address.
Security mitigations for this vulnerability should focus on implementing comprehensive input validation and output encoding mechanisms throughout the application. The primary remediation involves sanitizing all user-supplied data, particularly when processing image source attributes and other HTML content, to prevent javascript URI injection. Organizations should implement strict content security policies that prohibit execution of inline scripts and enforce proper HTML encoding for all user-generated content. The implementation of a centralized input validation framework would help ensure consistent sanitization across all application modules. Additionally, regular security code reviews and penetration testing should be conducted to identify and remediate similar vulnerabilities. This vulnerability aligns with CWE-79 (Cross-site Scripting) and represents a classic example of how insufficient input validation can lead to widespread exploitation across multiple application components. The attack pattern follows typical XSS exploitation techniques documented in the MITRE ATT&CK framework under the 'Command and Control' and 'Initial Access' phases, where adversaries establish persistent access through user interaction with malicious content.