CVE-2019-0888 in Windows
Summary
by MITRE
A remote code execution vulnerability exists in the way that ActiveX Data Objects (ADO) handle objects in memory, aka 'ActiveX Data Objects (ADO) Remote Code Execution Vulnerability'.
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Analysis
by VulDB Data Team • 05/20/2025
The vulnerability identified as CVE-2019-0888 represents a critical remote code execution flaw within Microsoft's ActiveX Data Objects (ADO) component, which forms a fundamental part of the data access infrastructure in Windows operating systems. This vulnerability specifically manifests in how ADO processes objects within memory, creating a pathway for malicious actors to execute arbitrary code on affected systems. The issue stems from improper memory handling mechanisms within the ADO library, which is widely used by applications for database connectivity and data manipulation tasks. Security researchers have classified this as a remote code execution vulnerability because it can be exploited over a network without requiring local system access, making it particularly dangerous for enterprise environments where database connectivity is pervasive.
The technical root cause of CVE-2019-0888 lies in memory corruption issues that occur when ADO handles certain data objects during processing operations. This flaw typically involves buffer overflows or use-after-free conditions that allow attackers to manipulate memory contents and inject malicious code into the target system's memory space. The vulnerability affects various versions of Windows operating systems including Windows 7, Windows 8, Windows 8.1, Windows Server 2008, Windows Server 2012, Windows Server 2016, and Windows Server 2019. The attack surface is extensive since ADO is integrated into numerous Microsoft applications and third-party software that relies on database connectivity, including web applications, desktop applications, and enterprise software solutions. This makes the exploitation potential particularly high as attackers can target any system that uses ADO components, whether through web browsers, email clients, or server applications.
The operational impact of this vulnerability extends beyond simple code execution, as it can lead to complete system compromise and persistent access for attackers. Once successfully exploited, the vulnerability allows adversaries to gain the same privileges as the user running the vulnerable application, potentially enabling lateral movement within networks and escalation to domain administrator privileges. The vulnerability is particularly concerning in enterprise environments where database servers and applications using ADO are common targets for attackers seeking to establish persistent backdoors. The exploitation typically requires a user to interact with malicious content, such as visiting a compromised website or opening a malicious document, making social engineering attacks more effective. This vulnerability has been actively exploited in the wild, with threat actors targeting specific organizations and government entities, highlighting the severity of the threat landscape.
Mitigation strategies for CVE-2019-0888 primarily focus on applying Microsoft's security patches and updates as soon as they become available, which address the underlying memory handling issues in the ADO components. Organizations should implement the security updates promptly and ensure that all systems running affected versions of Windows are patched. Network segmentation and access controls can help limit the potential impact of exploitation by restricting access to systems that use ADO components. Security monitoring should include detection of unusual database connection patterns and memory access behaviors that might indicate exploitation attempts. The vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and may also relate to CWE-122 for heap-based buffer overflows. From an ATT&CK framework perspective, this vulnerability maps to T1059 for command and scripting interpreter and T1068 for exploit for privilege escalation, demonstrating how the initial code execution can lead to broader system compromise. Organizations should also consider implementing application whitelisting policies to restrict the execution of untrusted code and deploy intrusion detection systems to monitor for suspicious network traffic patterns associated with exploitation attempts.