CVE-2018-0930 in Edge
Summary
by MITRE
ChakraCore and Microsoft Edge in Microsoft Windows 10 1709 allows remote code execution, due to how the Chakra scripting engine handles objects in memory, aka "Chakra Scripting Engine Memory Corruption Vulnerability". This CVE ID is unique from CVE-2018-0872, CVE-2018-0873, CVE-2018-0874, CVE-2018-0931, CVE-2018-0933, CVE-2018-0934, CVE-2018-0936, and CVE-2018-0937.
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Analysis
by VulDB Data Team • 02/21/2023
The ChakraCore scripting engine vulnerability identified as CVE-2018-0930 represents a critical memory corruption flaw that affects Microsoft Windows 10 version 1709 and Microsoft Edge browser. This vulnerability stems from improper handling of objects within memory management structures, creating a pathway for remote code execution attacks that can be exploited without user interaction. The flaw specifically manifests in how the Chakra engine processes JavaScript objects during runtime, leading to unpredictable memory states that adversaries can manipulate for malicious purposes.
This memory corruption vulnerability operates at a fundamental level within the browser's JavaScript engine, where object allocation and deallocation processes fail to maintain proper memory boundaries. The technical implementation flaw allows attackers to craft malicious web content that when rendered by Microsoft Edge or other applications leveraging ChakraCore, causes memory corruption that can be leveraged to execute arbitrary code with the privileges of the affected application. The vulnerability's classification aligns with CWE-125, which describes out-of-bounds read conditions, and CWE-787, which covers out-of-bounds write operations, both of which are common precursors to memory corruption exploits.
The operational impact of CVE-2018-0930 extends beyond simple browser compromise, as it enables attackers to gain persistent access to systems through browser-based attack vectors. This vulnerability is particularly dangerous because it can be exploited through web pages loaded in Microsoft Edge without any user interaction, making it a prime candidate for drive-by download attacks and zero-day exploitation campaigns. The exploit potential aligns with ATT&CK technique T1203, which covers exploitation for privilege escalation through web-based attacks, and T1059, which covers command and scripting interpreter usage for remote code execution.
Security professionals must understand that this vulnerability affects not only Microsoft Edge but also any application that utilizes ChakraCore as its JavaScript engine, including various Microsoft products and potentially third-party applications that integrate the engine. The exploitation requires sophisticated knowledge of memory layout and browser internals, typically requiring advanced persistent threat actors or well-funded adversaries. Mitigation strategies should include immediate deployment of Microsoft security updates, implementation of network-based protections such as web application firewalls, and browser hardening measures including sandboxing and restricted permissions. Additionally, organizations should consider deploying exploit prevention technologies and monitoring for anomalous JavaScript execution patterns that could indicate exploitation attempts. The vulnerability demonstrates the critical importance of maintaining up-to-date browser security patches and implementing layered defense strategies to protect against sophisticated memory corruption exploits that target core application components.