CVE-2018-8567 in Edge
Summary
by MITRE
An elevation of privilege vulnerability exists when Microsoft Edge does not properly enforce cross-domain policies, which could allow an attacker to access information from one domain and inject it into another domain, aka "Microsoft Edge Elevation of Privilege Vulnerability." This affects Microsoft Edge.
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Analysis
by VulDB Data Team • 06/06/2023
The vulnerability identified as CVE-2018-8567 represents a critical elevation of privilege flaw within Microsoft Edge browser that stems from inadequate enforcement of cross-domain security policies. This weakness allows malicious actors to exploit the browser's insufficient domain isolation mechanisms, creating a pathway for unauthorized data access and cross-site injection attacks. The vulnerability specifically targets the browser's security model that should prevent websites from accessing resources or data belonging to different domains, a fundamental web security principle that maintains user privacy and application integrity.
This technical flaw operates at the core of web browser security architecture where Microsoft Edge fails to properly validate or enforce the same-origin policy that governs how web pages from different domains interact with each other. The vulnerability enables attackers to leverage the browser's trust model to access sensitive information from one domain and subsequently inject that data into another domain, effectively bypassing the security boundaries that should exist between different web contexts. Such cross-domain data leakage can result in information disclosure, session hijacking, and unauthorized data manipulation across multiple websites that users trust.
The operational impact of this vulnerability extends beyond simple data theft, as it provides attackers with the capability to perform sophisticated attacks that can compromise user sessions and sensitive data across different web applications. Attackers can exploit this weakness to inject malicious content into trusted websites, potentially leading to credential theft, financial data exposure, or other forms of unauthorized access to user accounts. The vulnerability affects Microsoft Edge versions prior to the security update that addressed this specific cross-domain policy enforcement failure, leaving users exposed to attacks that can compromise their browsing sessions and personal information.
Organizations and users should implement immediate mitigations including applying the relevant Microsoft security updates that address this cross-domain policy enforcement weakness. The vulnerability aligns with CWE-200, which categorizes improper information exposure, and represents a violation of the principle of least privilege in web browser security. From an attack framework perspective, this vulnerability can be mapped to ATT&CK technique T1059, where attackers exploit browser vulnerabilities to execute malicious code, and T1566, which involves social engineering through compromised web applications. Security teams should also consider implementing additional browser hardening measures, such as strict content security policies and enhanced sandboxing configurations, to reduce the attack surface and prevent exploitation of similar cross-domain vulnerabilities in the browser environment.