CVE-2017-0230 in Edge
Summary
by MITRE
A remote code execution vulnerability exists in Microsoft Edge in the way JavaScript engines render when handling objects in memory, aka "Scripting Engine Memory Corruption Vulnerability." This CVE ID is unique from CVE-2017-0224, CVE-2017-0228, CVE-2017-0229, CVE-2017-0234, CVE-2017-0235, CVE-2017-0236, and CVE-2017-0238.
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Analysis
by VulDB Data Team • 12/23/2020
This vulnerability represents a critical memory corruption flaw in Microsoft Edge's JavaScript engine that enables remote code execution attacks. The issue specifically manifests when the scripting engine processes objects in memory, creating a condition where malicious code can manipulate memory layout and execution flow. The vulnerability is classified as a memory corruption issue that falls under the CWE-125 out-of-bounds read and CWE-787 out-of-bounds write categories, demonstrating how improper memory handling can lead to arbitrary code execution. The flaw exists within the V8 JavaScript engine component that Edge uses for rendering web content, making it particularly dangerous as it can be exploited through web-based attacks without requiring user interaction beyond visiting a malicious website.
The technical exploitation of this vulnerability occurs when Edge's JavaScript engine encounters specific object manipulation patterns that cause memory corruption during object rendering and execution. Attackers can craft malicious JavaScript code that triggers memory layout corruption, potentially allowing them to execute arbitrary code with the privileges of the Edge process. This type of vulnerability is categorized under the ATT&CK technique T1059.007 for Windows Command Shell and T1059.001 for Command and Scripting Interpreter, as it enables attackers to execute malicious code remotely through web browsers. The vulnerability's remote nature means that an attacker can deliver malicious payloads through web pages, email attachments, or other web-based delivery mechanisms without requiring local system access.
The operational impact of this vulnerability is severe as it allows attackers to gain complete control over affected systems running Microsoft Edge. Once exploited, the vulnerability provides attackers with the ability to install malware, steal sensitive data, modify system configurations, or establish persistent access through the compromised browser. The attack surface is extensive since Edge is a widely used browser on Windows systems, and the vulnerability affects multiple versions of the operating system including Windows 10, Windows 8.1, and Windows 7. The remote execution capability means that attackers can target users without requiring physical access or local privileges, making this vulnerability particularly dangerous in enterprise environments where multiple users may be exposed through web browsing activities.
Mitigation strategies should include immediate deployment of Microsoft security patches and updates, which address the underlying memory corruption issue in the JavaScript engine. Organizations should implement network-based protections such as web application firewalls and content filtering solutions to block known malicious domains and content. Browser hardening techniques including disabling unnecessary JavaScript features, implementing strict content security policies, and using sandboxing mechanisms can reduce the attack surface. Security monitoring should focus on detecting unusual JavaScript execution patterns and memory access anomalies that may indicate exploitation attempts. Additionally, user education about phishing attacks and suspicious web content can help prevent initial compromise, while regular security assessments should verify that systems are properly patched and configured to prevent exploitation of this vulnerability.