CVE-2020-0804 in Windows
Summary
by MITRE
An elevation of privilege vulnerability exists in the way that the Windows Network Connections Service handles objects in memory, aka 'Windows Network Connections Service Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2020-0778, CVE-2020-0802, CVE-2020-0803, CVE-2020-0845.
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Analysis
by VulDB Data Team • 04/10/2024
The vulnerability described in CVE-2020-0804 represents a critical elevation of privilege flaw within Windows network connections service functionality. This security weakness specifically targets how the Windows operating system manages object handling in memory spaces, creating an exploitable condition that allows attackers to escalate their privileges from standard user level to administrative rights. The vulnerability affects multiple Windows versions including Windows 10, Windows Server 2016, and Windows Server 2019, making it a widespread concern across enterprise and consumer environments. The flaw resides in the network connections service component that is responsible for managing network adapter configurations and connection states, which are fundamental to system operations.
Technical exploitation of this vulnerability occurs through improper memory management practices within the Windows Network Connections Service. When the service processes certain network connection objects, it fails to properly validate memory boundaries and object references, leading to potential memory corruption scenarios. Attackers can leverage this weakness by crafting malicious network connection requests or manipulating existing network configurations to trigger the vulnerable code path. The flaw operates at the kernel level where privilege escalation typically occurs, making it particularly dangerous as it can be exploited without requiring physical access to the target system. This type of vulnerability falls under the CWE-121 category of stack-based buffer overflow, though the specific implementation involves memory management issues rather than traditional buffer overflows. The vulnerability's classification aligns with ATT&CK technique T1068 which covers 'Exploitation for Privilege Escalation' and specifically addresses Windows service exploitation methods.
The operational impact of CVE-2020-0804 extends beyond simple privilege escalation, as successful exploitation can lead to complete system compromise and persistent access. Once an attacker achieves administrative privileges through this vulnerability, they can install malicious software, modify system files, access sensitive data, and establish backdoors for continued access. The network connections service is typically running with elevated privileges, making it an attractive target for attackers seeking to gain system-level control. Organizations running affected Windows versions face significant risk as this vulnerability can be exploited remotely through network-based attacks, potentially allowing attackers to compromise entire networks through a single successful exploitation. The vulnerability's impact is compounded by the fact that network connections service is frequently accessed during normal system operations, increasing the attack surface and exploitation probability.
Mitigation strategies for CVE-2020-0804 should prioritize immediate patch deployment through Microsoft's security updates, as the vendor has released patches addressing this specific memory management flaw. System administrators should also implement network segmentation and access controls to limit potential attack vectors, particularly by restricting unnecessary network connectivity to systems running vulnerable Windows versions. Monitoring network traffic for unusual connection patterns and implementing intrusion detection systems can help identify exploitation attempts. The vulnerability's exploitation requires specific conditions related to network connection management, so organizations should also consider disabling unnecessary network services and implementing least privilege principles for user accounts. Additionally, organizations should conduct regular security assessments and vulnerability scanning to identify systems that may be running vulnerable software versions, as the patching process requires careful deployment to avoid service interruptions while ensuring comprehensive protection against this and related vulnerabilities.