CVE-2017-8601 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-2017-8610, CVE-2017-8618, CVE-2017-8619, CVE-2017-8603, CVE-2017-8604, CVE-2017-8605, CVE-2017-8606, CVE-2017-8607, CVE-2017-8608, CVE-2017-8598 and CVE-2017-8609.
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Analysis
by VulDB Data Team • 12/14/2025
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 issue stems from improper handling of objects in memory during JavaScript execution, specifically when the engine attempts to render content that triggers a memory corruption condition. This particular vulnerability falls under the CWE-125 vulnerability category, which encompasses out-of-bounds read conditions that can lead to memory corruption and arbitrary code execution. The flaw exists in the JavaScript engine's memory management system where it fails to properly validate object boundaries when processing certain JavaScript constructs, creating a pathway for attackers to manipulate memory contents.
The operational impact of this vulnerability is severe as it allows remote code execution with the privileges of the current user account, effectively providing attackers with a powerful foothold within the target system. Attackers can craft malicious web pages that, when loaded in Microsoft Edge, trigger the memory corruption condition and subsequently execute arbitrary code on the victim's machine. This vulnerability is particularly dangerous because it leverages the browser's legitimate JavaScript processing capabilities to achieve exploitation, making it difficult to detect through traditional security controls. The attack vector is primarily through web-based delivery where users visit compromised websites or click on malicious links that contain the exploit code. According to ATT&CK framework, this vulnerability maps to T1059.007 (Command and Scripting Interpreter: JavaScript) and T1068 (Exploitation for Privilege Escalation) techniques, as it enables the execution of malicious scripts that can escalate privileges within the user context.
The technical exploitation of this vulnerability requires careful crafting of JavaScript code that can trigger the specific memory corruption pattern within Edge's rendering engine. Attackers typically leverage techniques such as heap spraying or use of specific JavaScript object manipulation patterns to force the engine into a state where memory corruption occurs. The vulnerability's persistence across multiple Windows 10 versions (Gold, 1511, 1607, and 1703) and Windows Server 2016 indicates a fundamental flaw in the core scripting engine architecture rather than a localized issue. Security researchers have identified that this vulnerability can be chained with other exploits to achieve full system compromise, making it a preferred target for advanced persistent threat actors. Organizations should implement immediate mitigations including applying the relevant Microsoft security patches, implementing browser hardening measures, and deploying network-based protections such as web application firewalls to block known malicious content. The vulnerability also underscores the importance of maintaining up-to-date security patches and implementing defense-in-depth strategies that include monitoring for suspicious JavaScript execution patterns and user behavior analytics to detect potential exploitation attempts.