CVE-2017-8617 in Edge
Summary
by MITRE
Microsoft Edge in Windows 10 1703 Microsoft Edge allows a remote code execution vulnerability in the way affected Microsoft scripting engines render when handling objects in memory, aka "Microsoft Edge Remote Code Execution Vulnerability."
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Analysis
by VulDB Data Team • 10/25/2019
The vulnerability identified as CVE-2017-8617 represents a critical remote code execution flaw within Microsoft Edge browser that affects Windows 10 version 1703. This vulnerability specifically targets the scripting engines used by Microsoft Edge, particularly those responsible for rendering web content and handling object manipulation in memory. The flaw arises from improper handling of objects during the rendering process, creating a pathway for malicious actors to execute arbitrary code on affected systems. The vulnerability falls under the category of memory corruption issues that are commonly exploited in browser-based attacks, making it particularly dangerous in enterprise environments where users frequently interact with web content.
The technical implementation of this vulnerability stems from how Microsoft Edge's scripting engines process and manage objects in memory during the rendering phase of web pages. When the browser encounters certain malformed or maliciously crafted web content, the scripting engine fails to properly validate object references, leading to memory corruption that can be exploited to gain arbitrary code execution privileges. This type of vulnerability is classified as a memory safety issue and aligns with CWE-125 which describes out-of-bounds read conditions that can lead to memory corruption. The flaw is particularly insidious because it operates within the browser's core rendering engine, making it difficult to detect and prevent through traditional security measures.
The operational impact of CVE-2017-8617 extends beyond simple remote code execution, as it provides attackers with a means to establish persistent access to compromised systems. Attackers can leverage this vulnerability through phishing emails, malicious websites, or compromised web applications to deliver exploit payloads that can bypass standard security controls. The vulnerability is particularly dangerous in enterprise environments where users may unknowingly navigate to malicious sites or receive targeted attacks through social engineering. According to ATT&CK framework, this vulnerability maps to T1059.007 for command and scripting interpreter and T1068 for exploit for privilege escalation, demonstrating how initial access through browser exploitation can lead to further system compromise and lateral movement within networks.
Mitigation strategies for this vulnerability require immediate patch deployment through Microsoft's regular security updates, as the flaw was addressed through the July 2017 security bulletin. Organizations should implement browser hardening measures including disabling unnecessary scripting features, implementing strict content security policies, and deploying web application firewalls to detect and block malicious traffic. Network-based mitigations such as intrusion detection systems can help identify exploitation attempts, while endpoint protection solutions should be configured to monitor for suspicious process creation patterns and memory access violations. The vulnerability also highlights the importance of maintaining up-to-date security patches across all Windows 10 systems, as the flaw affects multiple versions of the operating system and demonstrates the critical need for timely vulnerability remediation in preventing successful exploitation attempts.