CVE-2008-3472 in Internet Explorer
Summary
by MITRE
Microsoft Internet Explorer 6 and 7 does not properly determine the domain or security zone of origin of web script, which allows remote attackers to bypass the intended cross-domain security policy, and execute arbitrary code or obtain sensitive information, via a crafted HTML document, aka "HTML Element Cross-Domain Vulnerability."
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Analysis
by VulDB Data Team • 05/26/2025
The vulnerability identified as CVE-2008-3472 represents a critical cross-domain security flaw in Microsoft Internet Explorer versions 6 and 7 that fundamentally undermines the browser's security model. This vulnerability stems from Internet Explorer's improper handling of domain and security zone determination for web scripts, creating a significant bypass mechanism that allows malicious actors to circumvent the browser's intended cross-domain restrictions. The flaw specifically affects how the browser evaluates the origin of script elements within HTML documents, enabling attackers to exploit this weakness through carefully crafted web content.
The technical implementation of this vulnerability exploits the browser's security zone classification system, which traditionally enforces strict boundaries between different security levels such as Internet, Intranet, and Local Machine zones. When Internet Explorer processes HTML elements containing script references, it fails to correctly validate whether the originating domain matches the expected security context, allowing scripts from untrusted domains to be executed with elevated privileges. This misclassification occurs at the core level of the browser's security architecture, specifically within the script execution engine and domain validation mechanisms. The vulnerability manifests when attackers craft HTML documents that contain script elements referencing external domains, but the browser incorrectly treats these as originating from the same domain, thereby bypassing the security policies that normally prevent cross-domain script execution.
The operational impact of this vulnerability extends far beyond simple privilege escalation, as it provides attackers with multiple attack vectors for executing arbitrary code and accessing sensitive information. Remote attackers can leverage this flaw to perform cross-site scripting attacks, inject malicious scripts into trusted web pages, or manipulate the browser's security context to gain unauthorized access to user data. The vulnerability is particularly dangerous because it operates at the core of Internet Explorer's security model, potentially allowing attackers to access local files, steal session cookies, or perform actions on behalf of authenticated users. This weakness directly violates the fundamental principle of web security that prevents scripts from one domain from accessing resources or executing code in another domain without explicit permission.
Mitigation strategies for CVE-2008-3472 require immediate patch deployment and comprehensive security configuration adjustments. Microsoft released security updates that addressed the domain validation logic and corrected how Internet Explorer determines script origin, though organizations should also implement additional protective measures such as browser hardening, security zone configuration adjustments, and enhanced content filtering. The vulnerability aligns with CWE-200, which describes improper access control mechanisms, and maps to ATT&CK techniques related to privilege escalation and code injection. Organizations should consider implementing web application firewalls, restricting browser capabilities in enterprise environments, and ensuring all users have the latest security patches installed. The incident highlights the critical importance of proper domain validation in web browser security architecture and demonstrates how fundamental flaws in core security mechanisms can create widespread exploitation opportunities across multiple attack vectors.