CVE-2017-8605 in Edge
Summary
by MITRE
Microsoft Edge in Microsoft Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016 allow an attacker to execute arbitrary code in the context of the current user when the JavaScript engine fails to render when handling objects in memory in Microsoft Edge, aka "Scripting Engine Memory Corruption Vulnerability". This CVE ID is unique from CVE-2017-8596, CVE-2017-8601, CVE-2017-8618, CVE-2017-8619, CVE-2017-8610, CVE-2017-8601, CVE-2017-8603, CVE-2017-8604, CVE-2017-8598, CVE-2017-8606, CVE-2017-8607, CVE-2017-8608, and CVE-2017-8609.
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Analysis
by VulDB Data Team • 12/12/2022
This vulnerability represents a critical memory corruption flaw within Microsoft Edge's scripting engine that affects multiple Windows 10 versions and Windows Server 2016. The vulnerability specifically manifests when the JavaScript engine encounters objects in memory during rendering operations, creating a condition where arbitrary code execution becomes possible within the context of the currently logged-in user. This type of vulnerability falls under the CWE-125 Out-of-bounds Read category, where the engine fails to properly validate memory boundaries during object handling operations. The flaw demonstrates characteristics consistent with heap-based buffer overflows that can be exploited through carefully crafted JavaScript code delivered via web pages or malicious documents.
The operational impact of this vulnerability extends beyond simple code execution as it allows attackers to escalate privileges within the user's security context without requiring administrative rights. When exploited successfully, the vulnerability enables attackers to run malicious code with the same privileges as the victim user, potentially leading to full system compromise through subsequent attacks. This aligns with ATT&CK technique T1059.007 for Command and Scripting Interpreter and T1068 for Exploitation for Privilege Escalation. The vulnerability's exploitation requires a user to visit a malicious webpage or open a malicious document containing the crafted JavaScript payload, making it particularly dangerous in social engineering campaigns where users might be诱导 to interact with compromised content.
Mitigation strategies for this vulnerability include immediate deployment of Microsoft's security patches and updates released through Windows Update or Microsoft Update Catalog. Organizations should implement browser hardening measures such as enabling sandboxing features, restricting JavaScript execution in sensitive contexts, and deploying application whitelisting solutions to prevent unauthorized code execution. Network-based defenses can include web application firewalls that inspect and filter malicious JavaScript content, though these may not prevent all exploitation vectors. The vulnerability also highlights the importance of keeping all browser components updated and implementing security awareness training to reduce the risk of users encountering malicious content. Additionally, system administrators should consider implementing monitoring solutions to detect anomalous JavaScript behavior patterns that might indicate exploitation attempts. Given the nature of memory corruption vulnerabilities, regular security assessments and penetration testing should be conducted to identify potential exploitation vectors and ensure that all systems remain protected against similar threats.