CVE-2005-1008 in XM Forum
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in posts.asp for ASP-DEv XM Forum RC3 allows remote attackers to inject arbitrary web script or HTML via a "javascript:" URL in an IMG tag.
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Analysis
by VulDB Data Team • 06/22/2024
The vulnerability identified as CVE-2005-1008 represents a classic cross-site scripting flaw within the ASP-DEv XM Forum RC3 web application. This issue specifically affects the posts.asp component which processes user-generated content, creating an attack vector that enables remote adversaries to execute malicious scripts within the context of other users' browsers. The vulnerability stems from insufficient input validation and output encoding mechanisms within the forum's HTML rendering process, allowing attackers to embed malicious code that persists and executes when other users view affected content.
The technical exploitation of this vulnerability occurs through the manipulation of IMG tags containing javascript: URLs within forum posts. When a user views a post containing such malicious markup, the browser attempts to execute the embedded javascript code as if it were a legitimate image source, thereby bypassing standard security boundaries. This particular implementation flaw demonstrates a failure in proper HTML sanitization and context-aware output encoding, which are fundamental security practices recommended by the Open Web Application Security Project. The vulnerability maps directly to CWE-79 which categorizes improper neutralization of input during web page generation, specifically addressing the dangerous combination of user-controllable data and direct HTML injection.
The operational impact of this vulnerability extends beyond simple script execution to encompass potential data theft, session hijacking, and malicious content propagation within the forum environment. An attacker could craft posts containing malicious javascript that steals cookies, redirects users to phishing sites, or injects additional malicious content into the forum. The persistence of this vulnerability means that once exploited, the malicious code continues to execute for all users who view the affected posts, potentially affecting hundreds or thousands of forum participants depending on the forum's user base size. This makes the vulnerability particularly dangerous in community-driven platforms where users frequently interact with content posted by others.
Mitigation strategies for this vulnerability should include immediate implementation of proper input sanitization and output encoding mechanisms within the forum's content processing pipeline. The system must validate all user-submitted content to ensure that javascript: URLs are properly escaped or removed from IMG tag attributes before rendering. Organizations should implement Content Security Policy headers to prevent execution of inline scripts and establish proper HTML escaping routines for all user-generated content. Additionally, the forum software should be updated to a patched version that addresses this specific vulnerability, as the original software appears to lack adequate protection against cross-site scripting attacks. This vulnerability also highlights the importance of adhering to the principle of least privilege and implementing proper security controls during web application development phases, as recommended by the ATT&CK framework's web application security categories. The issue underscores the necessity for regular security assessments and input validation testing to prevent such persistent vulnerabilities from remaining in production environments.