CVE-2017-8670 in Edge
Summary
by MITRE
Microsoft Edge in Microsoft Windows 10 1607, 1703, and Windows Server 2016 allows an attacker to execute arbitrary code in the context of the current user due to the way that Microsoft browser JavaScript engines render content when handling objects in memory, aka "Scripting Engine Memory Corruption Vulnerability". This CVE ID is unique from CVE-2017-8634, CVE-2017-8635, CVE-2017-8636, CVE-2017-8638, CVE-2017-8639, CVE-2017-8640, CVE-2017-8641, CVE-2017-8645, CVE-2017-8646, CVE-2017-8647, CVE-2017-8655, CVE-2017-8656, CVE-2017-8657, CVE-2017-8671, CVE-2017-8672, and CVE-2017-8674.
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Analysis
by VulDB Data Team • 08/23/2024
This vulnerability represents a critical memory corruption flaw within Microsoft Edge's JavaScript engine, specifically affecting Windows 10 versions 1607 and 1703 along with Windows Server 2016. The issue stems from improper handling of objects in memory during content rendering processes, creating a pathway for remote code execution attacks. The vulnerability operates at the intersection of browser engine security and memory management, where the scripting engine fails to properly validate object references during JavaScript execution, leading to potential memory corruption that can be exploited by malicious actors.
The technical implementation of this vulnerability involves the manipulation of JavaScript objects within the browser's memory space, specifically targeting the V8 engine or similar JavaScript execution environments used by Microsoft Edge. When Edge processes certain JavaScript constructs or handles specific object interactions, it fails to perform adequate bounds checking or memory validation, allowing attackers to craft malicious web content that triggers memory corruption conditions. This type of vulnerability falls under the CWE-121 category of "Stack-based Buffer Overflow" and aligns with ATT&CK technique T1059.007 for "Command and Scripting Interpreter: JavaScript" in exploitation contexts.
The operational impact of this vulnerability is severe as it allows attackers to execute arbitrary code with the privileges of the current user account, bypassing typical security boundaries that separate browser processes from system resources. Successful exploitation can lead to full system compromise, data theft, or persistent backdoor installation. Attackers typically leverage this vulnerability through drive-by downloads, malicious websites, or compromised web applications that deliver specially crafted JavaScript payloads designed to trigger the memory corruption. The vulnerability's exploitation requires minimal user interaction beyond visiting a malicious website, making it particularly dangerous in real-world scenarios.
Mitigation strategies for this vulnerability include immediate deployment of Microsoft's security patches and updates, which address the specific memory handling flaws in the JavaScript engine. Organizations should implement network-based protections such as web application firewalls and content filtering solutions to block known malicious domains. Browser hardening measures including disabling unnecessary JavaScript features, implementing strict content security policies, and using sandboxing technologies can significantly reduce exploitation risk. Additionally, security monitoring should focus on detecting anomalous JavaScript execution patterns and memory access violations that may indicate exploitation attempts. The vulnerability demonstrates the critical importance of maintaining up-to-date browser security patches and implementing defense-in-depth strategies that protect against browser-based attack vectors.