CVE-2017-8718 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-2017-8717.
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Analysis
by VulDB Data Team • 09/11/2024
The Microsoft JET Database Engine vulnerability identified as CVE-2017-8718 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, which is a core component responsible for database operations across various Microsoft products. The flaw enables attackers to execute arbitrary code on affected systems with the privileges of the logged-on user, potentially leading to complete system compromise and unauthorized access to sensitive data.
The technical root cause of this vulnerability lies in improper memory management within the JET Database Engine when processing specially crafted database objects. Attackers can exploit this weakness by creating malicious database files or manipulating existing database content in ways that trigger buffer overflows or memory corruption conditions. The vulnerability manifests when the engine attempts to handle malformed or specially constructed database objects in memory, causing unpredictable behavior that can be leveraged to inject and execute malicious code. This type of flaw falls under the CWE-121 category of Stack-based Buffer Overflow, where insufficient bounds checking allows attackers to overwrite adjacent memory locations.
The operational impact of CVE-2017-8718 extends beyond simple system compromise, as it provides attackers with a powerful foothold for further exploitation within network environments. Once an attacker gains remote code execution capability, they can establish persistence mechanisms, escalate privileges, and move laterally across networks to access additional systems and data repositories. The vulnerability's presence in widely deployed operating systems including Windows Server 2008 and various Windows 10 versions makes it particularly dangerous for enterprise environments where database operations are common. Organizations with database applications running on affected systems face significant risk of data breaches, system downtime, and potential regulatory compliance violations.
Security professionals should implement multiple layers of defense to mitigate this vulnerability, including immediate deployment of Microsoft security patches, network segmentation to limit database access, and enhanced monitoring for suspicious database file access patterns. The ATT&CK framework categorizes this vulnerability under the T1059.007 technique for Command and Scripting Interpreter, as attackers may leverage the executed code to establish command shell access and conduct further reconnaissance. Organizations should also consider implementing application whitelisting policies to restrict execution of unauthorized database processing applications and maintain regular vulnerability assessments to identify potentially unpatched systems. Additionally, security teams should monitor for indicators of compromise such as unusual database file modifications, unexpected network connections, and abnormal system behavior that may signal exploitation attempts.