CVE-2017-8717 in Windows
Summary
by MITRE
The Microsoft JET Database Engine in Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1 and RT 8.1, Windows Server 2012 and R2, Windows 10 Gold, 1511, 1607, 1703, and Windows Server 2016 allows an attacker to take control of an affected system, due to how it handles objects in memory, aka "Microsoft JET Database Engine Remote Code Execution Vulnerability". This CVE ID is unique from CVE-2017-8718.
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Analysis
by VulDB Data Team • 09/11/2024
The Microsoft JET Database Engine vulnerability identified as CVE-2017-8717 represents a critical remote code execution flaw that affects multiple versions of Windows operating systems including server and client variants. This vulnerability specifically targets the memory handling mechanisms within the JET Database Engine component, which serves as the foundation for various Microsoft applications including Access, Outlook, and other database-dependent software. The flaw manifests when the engine processes malformed database objects in memory, creating opportunities for attackers to execute arbitrary code with the privileges of the targeted user. This vulnerability is particularly concerning because it can be exploited through various attack vectors including email attachments, web downloads, and malicious documents that leverage the JET engine's parsing capabilities.
The technical exploitation of CVE-2017-8717 occurs when maliciously crafted database files are processed by applications that utilize the JET Database Engine. The vulnerability stems from improper memory management and lack of adequate input validation within the engine's object handling routines. When the engine attempts to parse and load malformed database objects, it can lead to buffer overflows, memory corruption, or other exploitable conditions that allow attackers to inject and execute malicious code. This flaw aligns with CWE-121, which describes heap-based buffer overflow conditions, and CWE-125, which covers out-of-bounds read vulnerabilities. The vulnerability operates at the kernel level memory management, making it particularly dangerous as successful exploitation can result in complete system compromise and privilege escalation.
The operational impact of this vulnerability extends across enterprise environments where Microsoft Office applications and database systems are prevalent. Attackers can leverage this vulnerability to gain unauthorized access to systems, potentially leading to data breaches, lateral movement within networks, and establishment of persistent backdoors. The vulnerability affects systems running Windows 7, Windows Server 2008, Windows 8.1, and various versions of Windows 10 and Server 2016, representing a significant attack surface. Organizations utilizing Microsoft Access databases, Outlook with embedded database components, or applications that rely on JET engine functionality face heightened risk. The vulnerability can be exploited remotely through web-based attacks or via phishing campaigns delivering malicious database files, making it a preferred target for advanced persistent threat actors.
Mitigation strategies for CVE-2017-8717 primarily focus on immediate patch deployment through Microsoft's security updates, specifically addressing the JET Database Engine memory handling flaws. Organizations should implement comprehensive patch management procedures to ensure all affected systems receive updates promptly. Network segmentation and application whitelisting can help reduce attack surface by limiting access to potentially vulnerable applications. Security monitoring should include detection of suspicious database file processing activities and anomalous memory usage patterns. The vulnerability demonstrates characteristics aligned with ATT&CK technique T1059, which covers command and scripting interpreter usage, and T1068, involving exploit for privilege escalation. Additionally, implementing least privilege access controls and regular security assessments can help organizations better defend against exploitation attempts targeting this vulnerability.