CVE-2018-0835 in Edge
Summary
by MITRE
Microsoft Edge and ChakraCore in Microsoft Windows 10 Gold, 1511, 1607, 1703, 1709, and Windows Server 2016 allows remote code execution, due to how the scripting engine handles objects in memory, aka "Scripting Engine Memory Corruption Vulnerability". This CVE ID is unique from CVE-2018-0834, CVE-2018-0836, CVE-2018-0837, CVE-2018-0838, CVE-2018-0840, CVE-2018-0856, CVE-2018-0857, CVE-2018-0858, CVE-2018-0859, CVE-2018-0860, CVE-2018-0861, and CVE-2018-0866.
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Analysis
by VulDB Data Team • 06/30/2024
The vulnerability identified as CVE-2018-0835 represents a critical memory corruption flaw within Microsoft Edge's ChakraCore JavaScript engine that affects multiple Windows 10 versions and Windows Server 2016. This vulnerability specifically targets how the scripting engine manages object handling in memory, creating a pathway for remote code execution attacks that can be exploited by malicious actors. The flaw exists in the underlying ChakraCore engine that powers Microsoft Edge's JavaScript processing capabilities, making it particularly dangerous as it can be triggered 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 when processing certain JavaScript objects. According to CWE-125, this represents an out-of-bounds read condition where the engine fails to properly validate memory access patterns when handling JavaScript objects in memory. The vulnerability manifests when the scripting engine encounters specific object manipulation patterns that cause it to access memory locations beyond allocated boundaries, potentially leading to arbitrary code execution. This type of memory corruption vulnerability is particularly dangerous because it can be exploited to bypass modern security mitigations like address space layout randomization and data execution prevention.
The operational impact of CVE-2018-0835 is severe as it enables attackers to execute arbitrary code on vulnerable systems with the privileges of the current user. Attackers can craft malicious web pages that, when loaded in Microsoft Edge, trigger the memory corruption condition and subsequently execute malicious payloads. This vulnerability is particularly concerning because it affects widely deployed versions of Windows 10 and Windows Server 2016, providing attackers with a broad attack surface. The vulnerability aligns with ATT&CK technique T1059.007 for JavaScript, where adversaries leverage browser-based scripting languages to execute malicious code, and T1203 for exploitation for execution, making it a prime target for advanced persistent threat actors and automated exploit campaigns.
Mitigation strategies for CVE-2018-0835 should include immediate deployment of Microsoft's security patches and updates, particularly the cumulative security updates released in March 2018. Organizations should implement network-based protections such as web application firewalls and content filtering to block access to known malicious domains. Browser hardening measures including disabling JavaScript on untrusted websites, implementing strict content security policies, and using sandboxing technologies can provide additional layers of defense. Security teams should monitor for exploitation attempts through network traffic analysis and endpoint detection systems, as the vulnerability typically manifests through specific memory access patterns that can be detected by advanced threat detection solutions. Regular vulnerability scanning and penetration testing should be conducted to ensure all affected systems are properly patched and that no legacy systems remain exposed to this critical vulnerability.