CVE-2019-1379 in Windows
Summary
by MITRE
An elevation of privilege vulnerability exists when the Windows Data Sharing Service improperly handles file operations, aka 'Windows Data Sharing Service Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2019-1383, CVE-2019-1417.
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Analysis
by VulDB Data Team • 02/11/2024
The vulnerability identified as CVE-2019-1379 represents a critical elevation of privilege flaw within the Windows Data Sharing Service component of Microsoft Windows operating systems. This issue stems from improper handling of file operations within the data sharing service framework, creating a pathway for malicious actors to escalate their privileges from standard user level to administrative rights. The vulnerability specifically affects Windows 10 versions and Windows Server 2019, making it particularly concerning given the widespread deployment of these operating systems across enterprise environments. The flaw demonstrates a classic privilege escalation vector that can be exploited by attackers who gain initial access through less privileged means.
The technical implementation of this vulnerability resides in how the Windows Data Sharing Service processes file operations, particularly when handling shared resources and temporary file creation. Attackers can manipulate file paths or trigger specific file operations that cause the service to execute code with elevated privileges. This typically involves exploiting weaknesses in access control mechanisms or improper validation of file operations that occur during data sharing processes. The vulnerability is categorized under CWE-264, which specifically addresses permissions, privileges, and access control issues in software systems. The service's failure to properly validate file operations creates a condition where malicious input can be executed with higher privileges than intended.
From an operational impact perspective, this vulnerability poses significant risks to enterprise security postures as it allows attackers to gain administrative control over affected systems. Once exploited, the attacker can install malware, modify system files, create new user accounts, or access sensitive data repositories that would otherwise be protected by standard user permissions. The vulnerability can be particularly dangerous when combined with other exploitation techniques, as it provides the necessary privilege escalation to maintain persistence and conduct further attacks within the network. Security professionals must consider this vulnerability as part of broader attack chains that could lead to complete system compromise and data breaches.
Mitigation strategies for CVE-2019-1379 should include immediate deployment of Microsoft security patches and updates released to address the specific file operation handling issues within the Windows Data Sharing Service. Organizations should also implement network segmentation and access control measures to limit the potential impact of exploitation attempts. The vulnerability aligns with ATT&CK technique T1068, which covers 'Exploitation for Privilege Escalation', making it a critical target for defensive measures. Additional recommendations include monitoring for suspicious file operations within the data sharing service, implementing least privilege principles for user accounts, and conducting regular security assessments to identify and remediate similar privilege escalation vulnerabilities. System administrators should also consider disabling unnecessary data sharing features when they are not required for business operations, reducing the attack surface for potential exploitation.