CVE-2018-0834 in Edge
Summary
by MITRE
Microsoft Edge and ChakraCore in Microsoft Windows 10 Gold, 1511, 1607, 1703, 1709, and Windows Server 2016 allows remote code execution, due to how the scripting engine handles objects in memory, aka "Scripting Engine Memory Corruption Vulnerability". This CVE ID is unique from CVE-2018-0835, CVE-2018-0836, CVE-2018-0837, CVE-2018-0838, CVE-2018-0840, CVE-2018-0856, CVE-2018-0857, CVE-2018-0858, CVE-2018-0859, CVE-2018-0860, CVE-2018-0861, and CVE-2018-0866.
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Analysis
by VulDB Data Team • 09/08/2025
This vulnerability resides within Microsoft Edge's ChakraCore JavaScript engine and affects multiple Windows 10 versions including Gold, 1511, 1607, 1703, and 1709 along with Windows Server 2016. The flaw manifests as a memory corruption issue that occurs when the scripting engine processes objects in memory, creating a remote code execution vector that adversaries can exploit. The vulnerability specifically targets the memory management operations within the ChakraCore engine, which is responsible for executing JavaScript code in Microsoft Edge browser. This represents a critical security weakness that could allow attackers to execute arbitrary code on affected systems without requiring local access. The issue stems from improper handling of memory objects during JavaScript execution, creating potential for heap corruption that can be leveraged for privilege escalation and system compromise.
The technical exploitation of this vulnerability follows patterns consistent with memory corruption flaws classified under CWE-125 and CWE-787, where out-of-bounds memory access occurs during object handling operations. Attackers can craft malicious web content that when loaded in Microsoft Edge triggers the vulnerable code path in ChakraCore, leading to memory corruption that can be manipulated to execute malicious payloads. The vulnerability's classification aligns with ATT&CK technique T1059.007 for JavaScript-based execution and T1203 for exploitation of memory corruption vulnerabilities. The attack surface is particularly concerning as it affects the browser's JavaScript engine, which is frequently targeted due to its widespread use and the complex nature of modern web applications that rely heavily on scripting languages.
The operational impact of CVE-2018-0834 extends beyond simple remote code execution to potentially enable full system compromise when combined with other attack vectors. Organizations running affected Windows versions face significant risk as the vulnerability can be exploited through web-based attacks without user interaction, making it particularly dangerous in enterprise environments where users frequently browse the internet. The memory corruption aspect means that successful exploitation could lead to privilege escalation, allowing attackers to gain elevated system privileges and potentially establish persistent access. This vulnerability is especially concerning given that Microsoft Edge is the default browser on Windows 10 systems and many organizations have not yet implemented security mitigations or updated to patched versions of the operating system.
Mitigation strategies should prioritize immediate patching of affected systems with Microsoft security updates, as the vulnerability requires no user interaction to exploit and can be leveraged by attackers with minimal technical skill. Organizations should implement network-based protections including web application firewalls and content filtering solutions that can detect and block malicious JavaScript content. Browser hardening measures such as disabling JavaScript in trusted environments, implementing sandboxing mechanisms, and using security extensions can provide additional layers of protection. Security teams should monitor for indicators of compromise related to this vulnerability and implement security awareness training to reduce the risk of users visiting malicious websites. The ATT&CK framework suggests implementing defensive measures such as process injection detection, memory protection mechanisms, and network traffic analysis to identify exploitation attempts. Regular security assessments and vulnerability scanning should be conducted to identify unpatched systems within the organization, as this vulnerability affects multiple Windows versions and could be present in various deployment configurations.