CVE-2019-0784 in Windows
Summary
by MITRE
A remote code execution vulnerability exists in the way that the ActiveX Data objects (ADO) handles objects in memory, aka 'Windows ActiveX Remote Code Execution Vulnerability'.
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Analysis
by VulDB Data Team • 07/13/2024
The vulnerability identified as CVE-2019-0784 represents a critical remote code execution flaw within Microsoft Windows operating systems that specifically affects how ActiveX Data Objects (ADO) processes memory objects. This vulnerability resides in the core Windows component responsible for data access and manipulation through ActiveX technology, making it particularly dangerous as it can be exploited by attackers to gain unauthorized control over affected systems. The flaw manifests when ADO handles certain memory objects in ways that allow malicious code execution without requiring user interaction or elevated privileges, creating a significant threat vector for cyber adversaries targeting Windows environments.
The technical root cause of this vulnerability stems from improper memory handling within the ADO component, specifically related to how the system manages object references and memory allocation during data processing operations. When an attacker crafts malicious input that triggers the vulnerable code path, the memory corruption occurs in a manner that allows arbitrary code execution within the context of the current user. This vulnerability is classified under CWE-121 as a buffer overflow condition, where insufficient memory bounds checking leads to memory corruption that can be exploited to execute malicious code. The flaw exists in the Windows kernel-mode components that handle ActiveX data operations, making it particularly severe as it can potentially be leveraged to bypass security controls and escalate privileges.
The operational impact of CVE-2019-0784 extends far beyond simple remote code execution, as it enables attackers to establish persistent access to compromised systems and potentially move laterally within network environments. Attackers can leverage this vulnerability through various attack vectors including malicious websites, email attachments, or compromised applications that utilize ADO components. The vulnerability affects multiple Windows versions including Windows 7, Windows 8.1, Windows Server 2008 R2, Windows Server 2012, and Windows Server 2016, creating widespread exposure across enterprise environments. According to ATT&CK framework category T1203, this vulnerability enables adversaries to gain access to systems through exploitation of remote services and data access components, while T1059 indicates potential for command and control operations once initial compromise is achieved.
Mitigation strategies for CVE-2019-0784 should prioritize immediate patch deployment through Microsoft's regular security updates, as this vulnerability has been addressed through the Microsoft Security Bulletin MS19-037 released in April 2019. Organizations should implement network segmentation to limit access to systems that may be vulnerable, particularly those running older Windows versions without proper patching. Security controls should include monitoring for suspicious ADO-related activities and implementing application whitelisting policies to restrict execution of untrusted code. Additionally, organizations should conduct comprehensive vulnerability assessments to identify systems running outdated Windows versions that may still be exposed to this and similar vulnerabilities. The National Institute of Standards and Technology recommends maintaining up-to-date security patches as the primary defense mechanism against such vulnerabilities, while also implementing layered security approaches that include network monitoring and endpoint protection solutions to detect and prevent exploitation attempts.