CVE-2020-0767 in Edge
Summary
by MITRE
A remote code execution vulnerability exists in the way that the ChakraCore scripting engine handles objects in memory, aka 'Scripting Engine Memory Corruption Vulnerability'. This CVE ID is unique from CVE-2020-0673, CVE-2020-0674, CVE-2020-0710, CVE-2020-0711, CVE-2020-0712, CVE-2020-0713.
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Analysis
by VulDB Data Team • 05/10/2025
The vulnerability identified as CVE-2020-0767 represents a critical remote code execution flaw within Microsoft's ChakraCore JavaScript engine, which serves as the core scripting engine for Internet Explorer and Microsoft Edge browsers. This memory corruption vulnerability specifically manifests when the engine processes certain object interactions in memory, creating opportunities for malicious actors to execute arbitrary code on affected systems. The flaw exists at the fundamental level of how ChakraCore manages object references and memory allocation, making it particularly dangerous as it can be exploited through web-based attacks without requiring user interaction beyond visiting a malicious website.
The technical nature of this vulnerability stems from improper memory management within the ChakraCore engine, where object handling routines fail to properly validate memory boundaries during object operations. This memory corruption occurs when the engine processes objects that have been manipulated in ways that cause memory pointers to become invalid or corrupted, leading to potential code execution. The vulnerability is classified under CWE-125, which describes "Out-of-bounds Read" conditions, and aligns with ATT&CK technique T1203, "Exploitation for Client Execution," as attackers can leverage this flaw to execute malicious code in the context of the victim's browser session. The flaw's exploitation requires sophisticated understanding of memory layout and object manipulation within the JavaScript engine's internal architecture.
From an operational perspective, this vulnerability poses significant risks to enterprise environments where users may inadvertently visit compromised websites or receive malicious email attachments that trigger the exploit. The remote code execution capability means that attackers can gain full control over affected systems, potentially leading to data breaches, system compromise, and lateral movement within networks. The vulnerability affects multiple Microsoft products including Internet Explorer and Microsoft Edge, making it particularly concerning for organizations that have not yet applied the necessary security patches. The exploit can be delivered through various vectors including malicious websites, phishing emails, or compromised web applications, with the attack surface expanding due to the widespread use of Microsoft's web technologies.
Organizations should implement immediate mitigation strategies including prompt application of Microsoft's security updates, deployment of network-based protections such as web application firewalls, and implementation of browser hardening measures. The vulnerability's classification as a remote code execution flaw necessitates comprehensive monitoring of network traffic for potential exploitation attempts, along with regular security assessments to identify systems that may not have received the necessary patches. Additionally, security teams should consider implementing sandboxing techniques and restricting browser functionality to minimize potential impact should an exploit occur, while maintaining awareness of related vulnerabilities such as CVE-2020-0673 through CVE-2020-0713 that share similar exploitation patterns within the same software ecosystem.