CVE-2017-8497 in Edge
Summary
by MITRE
Microsoft Edge in Windows 10 1607 and Windows Server 2016 allows an attacker to execute arbitrary code in the context of the current user when Microsoft Edge improperly accesses objects in memory, aka "Microsoft Edge Memory Corruption Vulnerability". This CVE ID is unique from CVE-2017-8496.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 12/27/2020
The vulnerability identified as CVE-2017-8497 represents a critical memory corruption flaw within Microsoft Edge browser that affects Windows 10 version 1607 and Windows Server 2016 operating systems. This issue stems from improper handling of memory objects during browser operations, creating an execution environment where malicious actors can leverage the vulnerability to run arbitrary code with the privileges of the currently logged-in user. The vulnerability's classification as a memory corruption issue aligns with CWE-119, which specifically addresses improper access to memory locations. The flaw manifests when Edge processes certain web content that triggers incorrect memory management operations, potentially leading to unauthorized code execution.
The technical exploitation of this vulnerability occurs through a sophisticated attack vector that manipulates how Microsoft Edge handles memory objects during web page rendering and script execution. When the browser encounters specially crafted malicious content, it fails to properly validate memory access patterns, allowing attackers to manipulate memory locations and potentially overwrite critical program structures. This memory corruption can be leveraged to execute malicious code directly within the browser's process space, effectively bypassing many traditional security boundaries. The vulnerability's impact is particularly severe because it operates within the user context, meaning successful exploitation does not require administrative privileges but can still result in complete system compromise.
From an operational perspective, this vulnerability presents a significant risk to enterprise environments where Microsoft Edge is the primary browser or where users frequently access untrusted web content. The attack surface is broad as it can be triggered through various web-based attack vectors including malicious websites, phishing emails with embedded web content, or compromised web applications. The vulnerability's similarity to CVE-2017-8496 but distinct nature indicates a pattern of memory management flaws in Edge's rendering engine, suggesting potential systemic issues in how the browser handles memory operations. Organizations must consider the potential for lateral movement and privilege escalation once initial compromise occurs, as the executed code operates with user-level privileges.
Security mitigation strategies for CVE-2017-8497 should prioritize immediate patch deployment through Microsoft's regular security updates, as the vulnerability requires no user interaction to exploit and can be triggered through automated web browsing. Network-based defenses including web application firewalls and content filtering solutions can provide additional layers of protection by blocking known malicious content. Browser hardening measures such as enabling enhanced security features and restricting browser access to sensitive system resources can reduce the attack surface. The vulnerability's presence in Windows Server 2016 environments requires particular attention as these systems often serve critical business functions and may have elevated privileges. Organizations should implement comprehensive monitoring solutions to detect anomalous memory access patterns and potential exploitation attempts, aligning with ATT&CK framework's T1059.007 technique for command and scripting interpreter usage. Regular security assessments and penetration testing should include evaluation of browser-based attack surfaces to identify similar memory corruption vulnerabilities that may exist in other components of the browser ecosystem.