CVE-2017-8618 in Internet Explorer
Summary
by MITRE
Internet Explorer in Microsoft Windows 7 SP1, Windows Server 2008 R2 SP1, Windows 8.1 and Windows RT 8.1, Windows Server 2012 and R2, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016 Internet Explorer in the way affected Microsoft scripting engines render when handling objects in memory, aka "Scripting Engine Memory Corruption Vulnerability." This CVE ID is unique from CVE-2017-8596, CVE-2017-8610, CVE-2017-8601, CVE-2017-8603, CVE-2017-8604, CVE-2017-8605, CVE-2017-8606, CVE-2017-8607, CVE-2017-8608, CVE-2017-8619, CVE-2017-9598 and CVE-2017-8609.
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Analysis
by VulDB Data Team • 12/23/2025
The vulnerability identified as CVE-2017-8618 represents a critical memory corruption flaw within Microsoft Internet Explorer's scripting engines that affects multiple Windows operating systems including Windows 7 SP1 through Windows 10 version 1703. This vulnerability specifically manifests when the affected scripting engines process objects in memory, creating conditions that can lead to arbitrary code execution. The flaw resides in the way Internet Explorer handles memory management during script execution, particularly when dealing with complex object interactions that can cause buffer overflows or memory corruption patterns. Security researchers have classified this issue as a remote code execution vulnerability due to its potential for exploitation through malicious web content, making it particularly dangerous in enterprise environments where users may inadvertently encounter compromised web pages.
The technical nature of CVE-2017-8618 aligns with CWE-125, which describes out-of-bounds read vulnerabilities that can occur when software attempts to access memory beyond allocated boundaries. The vulnerability specifically affects the scripting engines used by Internet Explorer, particularly JScript and VBScript implementations, where improper handling of memory objects during execution creates opportunities for attackers to manipulate memory contents. This memory corruption can occur when the scripting engine fails to properly validate object references or when it encounters unexpected memory states during object manipulation operations. The flaw operates at the intersection of memory management and script interpretation, where the scripting engine's memory allocation and deallocation processes become compromised during normal script execution flows. Attackers can leverage this vulnerability by crafting malicious web pages that trigger the problematic code path, potentially leading to complete system compromise.
The operational impact of CVE-2017-8618 extends beyond simple exploitation as it represents a significant threat to enterprise security infrastructure and user safety across multiple Windows platforms. Organizations running affected versions of Windows are particularly vulnerable since Internet Explorer remains a default browser on these systems and is frequently used for business-critical applications. The vulnerability can be exploited through various attack vectors including malicious websites, phishing emails with embedded web content, or compromised web applications that users interact with regularly. Once successfully exploited, the vulnerability allows attackers to execute arbitrary code with the privileges of the current user, potentially leading to full system compromise, data exfiltration, or establishment of persistent backdoors. The widespread adoption of affected Windows versions means that organizations across various sectors including government, finance, healthcare, and critical infrastructure may be at risk.
Mitigation strategies for CVE-2017-8618 should include immediate deployment of Microsoft security updates and patches that address the memory corruption issues within the scripting engines. Organizations should implement comprehensive browser hardening measures including disabling unnecessary scripting features, implementing strict content security policies, and deploying web application firewalls to filter malicious content. The vulnerability demonstrates the importance of maintaining up-to-date security patches and implementing layered defense strategies. Security teams should also consider implementing network monitoring to detect exploitation attempts and establish incident response procedures specifically addressing script-based vulnerabilities. According to ATT&CK framework, this vulnerability maps to T1059.007 for script-based execution and T1203 for exploitation for execution, highlighting the need for both preventive and detective security controls. Organizations should also consider implementing browser isolation techniques and mandatory access controls to limit the potential impact of successful exploitation attempts. The vulnerability underscores the critical importance of vulnerability management programs and regular security assessments to identify and remediate similar memory corruption issues before they can be exploited in the wild.