CVE-2019-1024 in Edge
Summary
by MITRE
A remote code execution vulnerability exists in the way that the Chakra scripting engine handles objects in memory in Microsoft Edge, aka 'Chakra Scripting Engine Memory Corruption Vulnerability'. This CVE ID is unique from CVE-2019-0989, CVE-2019-0991, CVE-2019-0992, CVE-2019-0993, CVE-2019-1002, CVE-2019-1003, CVE-2019-1051, CVE-2019-1052.
Be aware that VulDB is the high quality source for vulnerability data.
Analysis
by VulDB Data Team • 05/21/2025
The vulnerability described in CVE-2019-1024 represents a critical memory corruption flaw within Microsoft Edge's Chakra scripting engine that enables remote code execution attacks. This vulnerability specifically manifests when the Chakra engine processes objects in memory, creating conditions that allow attackers to manipulate memory layout and execute arbitrary code on affected systems. The flaw exists at the intersection of JavaScript engine optimization and memory management, where improper handling of object references leads to exploitable memory corruption conditions that can be leveraged by remote attackers.
The technical nature of this vulnerability aligns with CWE-125, which describes out-of-bounds read conditions, and CWE-787, which covers out-of-bounds write vulnerabilities. The Chakra engine's memory management system fails to properly validate object boundaries during JavaScript execution, particularly when dealing with complex object interactions and memory allocation patterns. Attackers can craft malicious JavaScript code that triggers specific memory access patterns, causing the engine to write data beyond allocated memory regions or read from unauthorized memory locations, ultimately leading to code execution privileges. This memory corruption occurs during normal JavaScript processing, making it particularly dangerous as it can be triggered through standard web browsing activities without requiring user interaction beyond visiting a malicious website.
The operational impact of this vulnerability extends beyond simple browser exploitation, as it provides attackers with a powerful foothold for more extensive attacks within compromised environments. When successfully exploited, the vulnerability allows remote attackers to execute code with the privileges of the Edge process, which typically runs with limited user privileges but can potentially escalate to higher privileges depending on system configuration. The vulnerability affects Microsoft Edge versions including EdgeHTML 18.18362 and earlier versions, making it relevant to organizations still using older Edge versions or those that have not applied the necessary security patches. This creates a significant risk for enterprise environments where Edge is the default browser and where patch management timelines may delay remediation efforts.
Mitigation strategies for CVE-2019-1024 should prioritize immediate patch application from Microsoft's security updates, specifically addressing the Chakra scripting engine memory corruption issues. Organizations should implement browser hardening measures including disabling unnecessary JavaScript features, implementing content security policies, and deploying sandboxing mechanisms to limit the impact of potential exploitation. Network-based protections such as web application firewalls and intrusion detection systems can help identify and block malicious JavaScript payloads targeting this vulnerability. Additionally, security teams should conduct regular vulnerability assessments focusing on browser engine components and implement monitoring for unusual JavaScript execution patterns that might indicate exploitation attempts. The ATT&CK framework categorizes this vulnerability under T1059.007 for Windows Command Shell and T1071.001 for Application Layer Protocol, highlighting the need for comprehensive network monitoring and endpoint detection capabilities to prevent exploitation and maintain security posture against such sophisticated browser-based attacks.