CVE-2018-8234 in Edge
Summary
by MITRE
An information disclosure vulnerability exists when Microsoft Edge improperly handles objects in memory, aka "Microsoft Edge Information Disclosure Vulnerability." This affects Microsoft Edge. This CVE ID is unique from CVE-2018-0871.
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Analysis
by VulDB Data Team • 03/27/2023
The vulnerability identified as CVE-2018-8234 represents a critical information disclosure flaw within Microsoft Edge browser that stems from improper memory handling of objects. This vulnerability specifically targets the browser's memory management mechanisms and occurs when Edge fails to correctly process certain objects stored in memory, potentially exposing sensitive data to unauthorized parties. The flaw exists in the browser's rendering engine and memory allocation processes, creating a pathway for attackers to extract confidential information from the system's memory space.
This information disclosure vulnerability operates at the memory management level where Microsoft Edge's JavaScript engine and object handling mechanisms fail to properly validate or sanitize memory objects. The improper handling occurs during the execution of web content where the browser's memory management system does not adequately protect against unauthorized access to memory segments containing sensitive data. The vulnerability is classified under CWE-200, which specifically addresses "Information Exposure" and represents a fundamental breakdown in the system's ability to maintain data confidentiality.
The operational impact of CVE-2018-8234 extends beyond simple data exposure, as it can potentially enable more sophisticated attacks when combined with other exploitation techniques. Attackers could leverage this vulnerability to extract session tokens, user credentials, personal data, or other sensitive information that might be stored in memory during browser operations. The vulnerability affects the browser's ability to maintain secure memory boundaries, which could lead to privilege escalation or lateral movement within compromised systems. This type of vulnerability falls under the ATT&CK technique T1059.001 for Command and Scripting Interpreter and T1068 for Exploitation for Privilege Escalation, as it provides a foundation for more advanced attack vectors.
Mitigation strategies for CVE-2018-8234 require immediate application of Microsoft's security patches and updates to address the underlying memory handling flaws. Organizations should implement network segmentation and monitoring to detect potential exploitation attempts, while also ensuring that browser security policies are properly configured to limit memory access. The vulnerability demonstrates the importance of proper memory management in web browsers and highlights the need for continuous security testing of browser components. Security teams should also consider implementing additional monitoring for unusual memory access patterns and establish incident response procedures specifically designed to handle information disclosure vulnerabilities. Regular security assessments and penetration testing should be conducted to identify similar memory-related vulnerabilities that could potentially be exploited in similar ways to CVE-2018-8234.