CVE-2017-8527 in Windows
Summary
by MITRE
Graphics in Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, 1703, and Windows Server 2016 allows a remote code execution vulnerability due to the way it handles objects in memory, aka "Windows Graphics Remote Code Execution Vulnerability".
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 12/27/2020
This vulnerability represents a critical remote code execution flaw in Microsoft Windows operating systems that affects multiple versions including Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, 1703, and Windows Server 2016. The vulnerability specifically relates to how the Windows graphics subsystem handles objects in memory, creating a pathway for malicious actors to execute arbitrary code on affected systems. The flaw exists within the Windows Graphics Component and is categorized under CWE-125 as an out-of-bounds read vulnerability, where the system attempts to access memory locations beyond the allocated boundaries. This type of memory corruption vulnerability is particularly dangerous because it can be exploited through various attack vectors including malicious documents, web content, or specially crafted graphics files that trigger the vulnerable graphics processing code. The vulnerability is classified as a remote code execution flaw because an attacker can exploit it without requiring local system access, making it highly dangerous for enterprise environments where systems may be exposed to untrusted networks or content. The Windows Graphics Remote Code Execution Vulnerability demonstrates how graphics processing components can serve as attack surfaces for sophisticated exploitation techniques, particularly when dealing with memory management and object handling in rendering engines. This flaw has significant implications for cybersecurity operations as it allows threat actors to gain unauthorized access to systems and potentially establish persistent footholds within networks. The vulnerability is particularly concerning because it affects a wide range of Windows versions and the graphics subsystem is commonly used across all these platforms, making it an attractive target for attackers seeking broad exploitation capabilities. Organizations running affected systems are at risk of complete system compromise, data exfiltration, and potential lateral movement within their networks.
The technical exploitation of this vulnerability involves leveraging memory corruption issues within the Windows graphics rendering pipeline where improperly validated graphics objects can cause the system to execute malicious code. Attackers typically craft malicious content that when processed by the graphics subsystem triggers the out-of-bounds memory access, leading to arbitrary code execution with the privileges of the compromised process. This vulnerability aligns with ATT&CK technique T1059.007 for command and scripting interpreter and T1068 for exploit for privilege escalation, as the initial compromise often leads to further system exploitation. The flaw demonstrates how graphics processing components can become entry points for sophisticated cyber attacks, particularly when dealing with file format parsing and rendering operations. Security researchers have identified that the vulnerability can be triggered through various means including opening malicious Word documents, viewing crafted web pages, or interacting with specially designed graphics files that exploit the memory handling issues in the graphics subsystem. The vulnerability's classification as a remote code execution flaw makes it particularly dangerous for enterprise environments where users may inadvertently encounter malicious content through email attachments, web browsing, or file sharing activities. This type of vulnerability often requires immediate patching due to its potential for widespread exploitation and the difficulty in detecting exploitation attempts through traditional security monitoring.
Mitigation strategies for this vulnerability involve implementing timely security updates from Microsoft as part of the regular patch management process, which addresses the underlying memory handling issues in the graphics subsystem. Organizations should prioritize patching affected systems and implement network segmentation to limit potential lateral movement if exploitation occurs. Additional protective measures include deploying application whitelisting solutions to prevent execution of unauthorized graphics processing components, implementing strict email filtering and web content filtering to block malicious documents and web content, and monitoring for unusual graphics processing activity that may indicate exploitation attempts. Security teams should also consider implementing endpoint detection and response solutions that can identify anomalous behavior in graphics processing components and memory access patterns. The vulnerability highlights the importance of maintaining comprehensive patch management programs and understanding that graphics processing components, while seemingly benign, can serve as critical attack vectors for sophisticated cyber threats. Organizations should also conduct regular vulnerability assessments to identify systems running affected versions of Windows and ensure proper security controls are in place to protect against similar memory corruption vulnerabilities. Regular security awareness training for users can help reduce the risk of exploitation through social engineering attacks that deliver malicious content through email or web browsing activities, which are common initial infection vectors for this type of vulnerability.