CVE-2018-0934 in Edge
Summary
by MITRE
ChakraCore and Microsoft Windows 10 Gold, 1511, 1607, 1703, 1709, and Windows Server 2016 allows remote code execution, due to how the Chakra scripting engine handles objects in memory, aka "Chakra Scripting Engine Memory Corruption Vulnerability". This CVE ID is unique from CVE-2018-0872, CVE-2018-0873, CVE-2018-0874, CVE-2018-0930, CVE-2018-0931, CVE-2018-0933, CVE-2018-0936, and CVE-2018-0937.
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Analysis
by VulDB Data Team • 09/11/2025
The ChakraCore scripting engine vulnerability identified as CVE-2018-0934 represents a critical memory corruption flaw that affects multiple Microsoft Windows operating systems including Windows 10 versions 1511, 1607, 1703, and 1709 along with Windows Server 2016. This vulnerability resides within the Chakra scripting engine which serves as the JavaScript engine powering Microsoft Edge browser and various other Microsoft applications. The flaw stems from improper handling of objects in memory during script execution, creating a condition where malicious actors can manipulate memory structures to achieve arbitrary code execution. This particular vulnerability is distinct from several related issues including CVE-2018-0872 through CVE-2018-0937, each representing different attack vectors targeting the same underlying Chakra engine components but exploiting separate implementation weaknesses.
The technical nature of this vulnerability falls under CWE-125, which describes out-of-bounds read conditions where an application attempts to access memory beyond its allocated bounds. When the Chakra engine processes certain JavaScript objects, it fails to properly validate memory boundaries during object manipulation operations, leading to potential memory corruption scenarios. Attackers can craft malicious JavaScript code that, when executed by the vulnerable Chakra engine, triggers memory corruption that can be leveraged to execute arbitrary code with the privileges of the compromised application. This memory corruption typically occurs during object allocation, deallocation, or property access operations where the engine's memory management routines do not adequately protect against malformed input or unexpected object states.
The operational impact of CVE-2018-0934 extends beyond simple remote code execution to encompass significant security implications for enterprise environments and individual users. Attackers can exploit this vulnerability through various attack vectors including phishing emails containing malicious web content, compromised websites, or drive-by download scenarios where users unknowingly visit malicious sites. The vulnerability is particularly dangerous because it can be triggered through legitimate browser functionality, making detection and prevention challenging. Once exploited, the vulnerability allows attackers to execute code with the privileges of the compromised process, potentially leading to full system compromise, data exfiltration, or establishment of persistent backdoors. The affected systems include multiple Windows versions, creating a broad attack surface that increases the likelihood of successful exploitation across various organizational environments.
Mitigation strategies for CVE-2018-0934 should prioritize immediate patch deployment through Microsoft's regular security updates, as the vendor has released patches specifically addressing this memory corruption vulnerability. Organizations should implement network segmentation and monitoring to detect anomalous JavaScript execution patterns that may indicate exploitation attempts. Browser hardening measures including disabling unnecessary JavaScript features, implementing content security policies, and using sandboxing techniques can reduce the attack surface. Additionally, security teams should monitor for indicators of compromise such as unusual process creation patterns, memory access violations, or unexpected network connections originating from compromised systems. The vulnerability's classification under the ATT&CK framework would place it within the execution and privilege escalation categories, emphasizing the need for comprehensive endpoint detection and response capabilities. Organizations should also consider implementing application whitelisting policies to restrict execution of potentially malicious JavaScript code and maintain regular vulnerability assessments to identify similar memory corruption issues in other software components.