CVE-2017-8598 in Edge
Summary
by MITRE
Microsoft Edge in Microsoft Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016 allow an attacker to execute arbitrary code in the context of the current user when the JavaScript engine fails to render when handling objects in memory in Microsoft Edge, aka "Scripting Engine Memory Corruption Vulnerability". This CVE ID is unique from CVE-2017-8596, CVE-2017-8610, CVE-2017-8618, CVE-2017-8619, CVE-2017-8595, CVE-2017-8601, CVE-2017-8603, CVE-2017-8604, CVE-2017-8605, CVE-2017-8606, CVE-2017-8607, CVE-2017-8608, and CVE-2017-8609.
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Analysis
by VulDB Data Team • 12/12/2022
This vulnerability represents a critical memory corruption flaw within Microsoft Edge's JavaScript engine that affects multiple Windows 10 versions and Windows Server 2016. The issue manifests when the browser's rendering engine processes objects in memory, creating conditions where an attacker can manipulate memory structures to execute arbitrary code with the privileges of the currently logged-in user. The vulnerability is classified as a scripting engine memory corruption vulnerability, which falls under the CWE-119 weakness category that specifically addresses memory access violations and buffer overflows. This type of vulnerability is particularly dangerous because it operates within the browser's trusted execution environment, allowing attackers to bypass traditional security boundaries that separate user applications from system resources.
The technical exploitation of this vulnerability requires an attacker to craft malicious web content that triggers the specific memory corruption scenario within Edge's JavaScript engine. When Microsoft Edge attempts to render certain objects in memory, the engine fails to properly validate or manage memory allocations, creating opportunities for attackers to inject and execute malicious code. This attack vector aligns with the ATT&CK technique T1059.007 for "Command and Scripting Interpreter: JavaScript" and represents a classic use of browser-based exploitation techniques. The vulnerability's impact extends beyond simple code execution as it can potentially enable privilege escalation, data theft, and persistence mechanisms within the compromised system.
The operational impact of this vulnerability is significant for organizations relying on Microsoft Edge as their primary browser, particularly in environments where users may encounter untrusted web content. Attackers could leverage this vulnerability through phishing campaigns, malicious websites, or compromised advertisements to gain unauthorized access to systems. The fact that this vulnerability affects multiple Windows 10 versions including the widely deployed 1511, 1607, and 1703 releases means that a substantial portion of the enterprise user base remains at risk. Organizations with older Windows Server 2016 deployments are also vulnerable, making this an enterprise-wide concern that affects both desktop and server environments.
Mitigation strategies should focus on immediate patch deployment through Microsoft's regular security updates, as this vulnerability was addressed in the August 2017 security bulletin. Network-based protections such as web application firewalls and browser isolation solutions can provide additional layers of defense. Organizations should also implement user education programs to reduce the likelihood of encountering malicious content, while monitoring for unusual network activity that might indicate exploitation attempts. Security teams should consider implementing exploit prevention mechanisms such as address space layout randomization and data execution prevention features. The vulnerability's classification as a memory corruption issue also emphasizes the importance of maintaining up-to-date memory protection features and ensuring that automatic updates are properly configured across all affected systems to prevent exploitation attempts.