CVE-2020-17092 in Windows
Summary
by MITRE • 12/10/2020
, aka 'Windows Network Connections Service Elevation of Privilege Vulnerability'.
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Analysis
by VulDB Data Team • 08/29/2025
This vulnerability resides within the Windows Network Connections Service, specifically affecting the network management functionality that handles network connection configurations and services. The flaw represents a privilege escalation issue that allows attackers to elevate their access rights from standard user level to system level privileges, effectively bypassing Windows security controls. The vulnerability stems from improper access control mechanisms within the network connections service, which fails to properly validate the privileges of processes attempting to interact with network configuration components. This issue specifically impacts Windows operating systems where the network connections service runs with elevated privileges, creating a potential attack vector for malicious actors seeking to gain unauthorized system access.
The technical implementation of this vulnerability involves a flaw in the Windows Network Connections Service component that manages network interface configurations and connection states. When legitimate network management operations occur, the service fails to properly enforce security boundaries and validate the calling process privileges. This allows a low-privilege user to manipulate network connection parameters in a way that triggers privilege escalation. The flaw operates through the service's handling of specific API calls and system resource access patterns that should normally be restricted to system-level processes. The vulnerability is particularly concerning because it leverages legitimate Windows service functionality rather than requiring exploitation of additional weaknesses, making detection more challenging and the attack more reliable.
The operational impact of CVE-2020-17092 extends beyond simple privilege escalation, as successful exploitation can lead to complete system compromise and persistent access. Attackers can leverage this vulnerability to install malicious software, modify system configurations, access sensitive data, and establish backdoors for continued unauthorized access. The vulnerability affects a wide range of Windows operating systems including Windows 10, Windows Server 2016, and Windows Server 2019, making it particularly dangerous in enterprise environments where these systems are prevalent. Organizations with multiple networked devices running affected Windows versions face significant risk, as the vulnerability can be exploited through various attack vectors including malicious network connections, compromised user accounts, or through lateral movement from already compromised systems. This vulnerability directly maps to CWE-276, which addresses improper privilege management and insufficient access control, and aligns with ATT&CK technique T1068, which covers privilege escalation through local exploitation.
Mitigation strategies for this vulnerability require immediate application of Microsoft security patches and updates, as the primary fix involves correcting the privilege validation mechanisms within the network connections service. Organizations should implement network segmentation and access control measures to limit user access to network configuration components, while also monitoring for suspicious network connection activities that might indicate exploitation attempts. System administrators should consider implementing additional security controls such as Windows Defender Application Control or AppLocker policies to restrict access to network management tools. The vulnerability highlights the importance of maintaining up-to-date security patches and implementing defense-in-depth strategies that reduce the attack surface for privilege escalation exploits. Regular security assessments and monitoring of system logs for unauthorized network configuration changes can help detect potential exploitation attempts, while also providing evidence for incident response activities should the vulnerability be successfully targeted.