CVE-2018-8280 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 affects Microsoft Edge, ChakraCore. This CVE ID is unique from CVE-2018-8286, CVE-2018-8290, CVE-2018-8294.
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Analysis
by VulDB Data Team • 04/05/2023
The vulnerability identified as CVE-2018-8280 represents a critical memory corruption flaw within Microsoft Edge's Chakra scripting engine, which serves as the JavaScript engine powering the browser's web content execution. This particular weakness manifests when the engine processes objects in memory, creating conditions that allow attackers to manipulate memory structures in ways that can lead to arbitrary code execution. The vulnerability specifically impacts Microsoft Edge browsers and the ChakraCore engine, which is used in various Microsoft products and applications beyond the browser environment. Security researchers have noted that this issue is distinct from several other related vulnerabilities including CVE-2018-8286, CVE-2018-8290, and CVE-2018-8294, each representing different aspects of the Chakra engine's memory handling capabilities.
The technical exploitation of this vulnerability occurs through carefully crafted malicious web content that triggers improper memory management within the Chakra engine. When Edge processes JavaScript code containing specific patterns or objects, the engine's memory allocation and deallocation mechanisms can become corrupted, potentially allowing an attacker to overwrite memory locations with malicious code. This memory corruption typically occurs during object manipulation operations where the engine fails to properly validate object boundaries or memory references. The flaw essentially creates a pathway for attackers to bypass standard security mitigations and execute arbitrary commands on the victim's system with the privileges of the browser process. According to CWE classification, this vulnerability maps to CWE-125, which describes "Out-of-bounds Read" conditions, and CWE-787, which covers "Out-of-bounds Write" scenarios, both of which are fundamental memory safety issues that enable remote code execution.
The operational impact of CVE-2018-8280 extends beyond simple browser compromise, as successful exploitation can result in complete system takeover. Attackers can leverage this vulnerability to install malware, steal sensitive data, conduct man-in-the-middle attacks, or establish persistent backdoors within the compromised environment. The remote nature of the exploit means that victims can be compromised simply by visiting malicious websites or receiving crafted email attachments containing malicious web content. This vulnerability particularly affects enterprise environments where users frequently access untrusted web content, making it a prime target for advanced persistent threat campaigns. Organizations using Microsoft Edge as their primary browser face significant risk, especially when users lack proper security awareness training or when enterprise security policies fail to enforce strict web content filtering.
Mitigation strategies for CVE-2018-8280 primarily focus on immediate patch management and operational security enhancements. Microsoft released security updates addressing this vulnerability through regular monthly patches, and organizations should prioritize immediate deployment of these updates across all affected systems. Beyond patching, security teams should implement browser hardening measures including disabling unnecessary JavaScript features, implementing strict content security policies, and deploying web application firewalls to filter malicious content. Network-level protections such as sandboxing mechanisms and privilege separation can help limit the damage if exploitation occurs. Security professionals should also consider implementing behavioral monitoring solutions that can detect anomalous memory access patterns or unusual JavaScript execution that might indicate exploitation attempts. According to ATT&CK framework, this vulnerability aligns with techniques such as T1059.007 for JavaScript execution and T1068 for local privilege escalation, making comprehensive threat hunting and incident response procedures essential for organizations defending against such attacks. The vulnerability underscores the critical importance of maintaining current security patches and implementing defense-in-depth strategies to protect against sophisticated exploitation techniques targeting core browser components.