CVE-2018-1003 in Windows
Summary
by MITRE
A buffer overflow vulnerability exists in the Microsoft JET Database Engine that could allow remote code execution on an affected system, aka "Microsoft JET Database Engine Remote Code Execution Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10.
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Analysis
by VulDB Data Team • 08/15/2024
The CVE-2018-1003 vulnerability represents a critical buffer overflow flaw within Microsoft's JET Database Engine, a component that has been integral to various Windows operating systems since Windows 95. This database engine serves as the foundation for Microsoft Access and other applications that require local data storage capabilities. The vulnerability stems from improper bounds checking when processing specially crafted database files, creating a scenario where malicious input can overwrite adjacent memory locations. The flaw specifically affects a wide range of Windows versions including Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, and Windows 10, indicating the pervasive nature of this security weakness across Microsoft's product ecosystem.
This buffer overflow vulnerability operates through the manipulation of database file structures that the JET engine processes during normal operation. When a maliciously crafted database file is opened or accessed, the engine fails to properly validate the size and structure of data elements, leading to memory corruption that can be exploited by attackers. The technical implementation of this flaw aligns with CWE-121, which describes heap-based buffer overflow conditions where insufficient bounds checking allows attackers to write beyond allocated memory boundaries. The vulnerability's exploitation potential is heightened by the fact that it can be triggered through various attack vectors including email attachments, web downloads, or file sharing scenarios where users might unknowingly open compromised database files. The attack surface is particularly concerning because the JET engine is widely used across Microsoft applications, making the exploitation pathway more accessible to threat actors.
The operational impact of this vulnerability extends beyond simple remote code execution, encompassing potential system compromise, data theft, and lateral movement capabilities within affected networks. When successfully exploited, the vulnerability allows attackers to execute arbitrary code with the privileges of the user who opens the malicious file, potentially leading to full system compromise. The attack chain typically involves crafting a malicious database file that triggers the buffer overflow when processed by the vulnerable JET engine, followed by privilege escalation or system exploitation to achieve persistent access. This vulnerability directly maps to ATT&CK technique T1059.007 for command and script interpreter, as exploitation often involves executing malicious code through compromised database processing. The widespread presence of the vulnerable component across multiple Windows versions makes this a particularly dangerous vulnerability for enterprise environments, as it can be exploited across various system configurations without requiring specific target knowledge.
Mitigation strategies for CVE-2018-1003 must address both immediate remediation and long-term security posture improvements. The primary recommendation involves applying Microsoft's security patches and updates as soon as they become available, specifically targeting the JET Database Engine components. Organizations should implement application whitelisting policies to prevent execution of untrusted database files, particularly in environments where users might encounter suspicious attachments or downloads. Network segmentation and monitoring solutions should be deployed to detect unusual database file access patterns or attempts to open malformed database content. Security awareness training programs must emphasize the dangers of opening database files from untrusted sources, as social engineering remains a common initial attack vector. System hardening measures including disabling unnecessary database engine functionality, implementing least privilege access controls, and maintaining regular backup procedures are essential defensive measures. Additionally, organizations should consider implementing automated patch management systems to ensure timely deployment of security updates across all affected Windows versions, as the vulnerability's exploitation potential makes prompt remediation critical for maintaining system security.