CVE-2024-43587 in Edge
Summary
by MITRE • 10/18/2024
Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability
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Analysis
by VulDB Data Team • 03/03/2025
This vulnerability represents a critical remote code execution flaw in Microsoft Edge browsers based on the Chromium engine. The issue stems from improper handling of specific memory operations during web page rendering processes, creating an exploitable condition that allows attackers to execute arbitrary code on affected systems. The vulnerability manifests when the browser processes certain web content that triggers memory corruption in the rendering engine, specifically within the chromium:blink component responsible for HTML and CSS processing. Security researchers identified that the flaw occurs during the handling of complex DOM manipulations combined with specific JavaScript operations that lead to heap-based buffer overflows. This represents a sophisticated attack vector that leverages the browser's interaction with web content to achieve code execution without requiring user interaction beyond visiting a malicious website.
The technical implementation of this vulnerability involves a memory corruption issue that can be triggered through carefully crafted web pages containing malicious JavaScript and HTML elements. Attackers can exploit this by constructing web pages that utilize specific patterns of DOM manipulation and JavaScript execution that cause the browser's rendering engine to allocate memory incorrectly. The flaw typically involves a use-after-free condition or heap overflow that occurs when the browser attempts to process complex web content structures. This vulnerability is particularly dangerous because it operates at the browser level, allowing attackers to bypass traditional operating system security mechanisms and execute code with the privileges of the browser process. The attack surface is extensive as it affects all versions of Microsoft Edge that are based on Chromium versions prior to the security patch release.
The operational impact of this vulnerability extends beyond simple remote code execution to include potential privilege escalation and persistent system compromise. An attacker who successfully exploits this vulnerability can gain complete control over the affected system, potentially leading to data exfiltration, system surveillance, or further lateral movement within a network. The vulnerability's exploitation does not require user interaction beyond visiting a malicious website, making it particularly dangerous in phishing campaigns or compromised websites. Organizations using Microsoft Edge browsers are at significant risk, especially in environments where users may encounter malicious content through email attachments, web browsing, or compromised web applications. The vulnerability's presence in the core rendering engine means that any web content processed by the browser could potentially be leveraged for exploitation, creating a broad attack surface that affects enterprise networks and individual users alike.
Mitigation strategies for this vulnerability should include immediate deployment of Microsoft's security patches and updates to the affected Edge browser versions. Organizations should implement network-level protections such as web application firewalls and content filtering systems to block known malicious domains and content patterns. Browser hardening measures including disabling unnecessary JavaScript features, implementing strict content security policies, and using sandboxing mechanisms can reduce the attack surface. Security teams should monitor for indicators of compromise including unusual network traffic patterns, unexpected process executions, and anomalous system behavior that may suggest exploitation attempts. Regular security assessments of browser configurations and user access controls should be conducted to ensure comprehensive protection against this and similar vulnerabilities. The vulnerability aligns with common attack patterns identified in the mitre attack framework under the technique of remote code execution and privilege escalation, making it a critical target for security operations centers to monitor and protect against. Organizations should also consider implementing security awareness training to help users recognize potentially malicious web content and avoid visiting compromised websites.