CVE-2020-0780 in Windows
Summary
by MITRE
An elevation of privilege vulnerability exists in the way that the Windows Network List Service handles objects in memory, aka 'Windows Network List Service Elevation of Privilege Vulnerability'.
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Analysis
by VulDB Data Team • 04/10/2024
The vulnerability identified as CVE-2020-0780 represents a critical elevation of privilege flaw within the Windows Network List Service component of Microsoft operating systems. This vulnerability specifically manifests in how the service processes objects stored in memory, creating an exploitable condition that allows malicious actors to escalate their privileges from standard user level to system level access. The Network List Service is responsible for managing network connectivity information and providing network-related services to applications, making it a critical component that requires robust security controls.
This memory handling flaw falls under the category of improper handling of objects in memory, which aligns with CWE-121 and CWE-122 classification standards. The vulnerability occurs when the Windows Network List Service fails to properly validate or sanitize memory objects during processing, potentially allowing an attacker to manipulate memory structures and execute arbitrary code with elevated privileges. The flaw exists in the service's object management routines where insufficient bounds checking or memory validation allows for memory corruption that can be exploited to gain system-level access.
The operational impact of this vulnerability is severe as it provides attackers with a pathway to achieve system compromise without requiring initial administrative access. Once exploited, the vulnerability allows attackers to execute code with the highest privileges available to the system, enabling them to install malware, modify system files, create new user accounts, or establish persistence mechanisms. The attack vector typically involves sending specially crafted network requests or manipulating network configuration data that triggers the vulnerable memory handling code path within the Network List Service. This makes the vulnerability particularly dangerous in enterprise environments where network connectivity is constantly managed and where attackers may leverage other initial access vectors to reach this service.
Security professionals should implement immediate mitigations including applying the relevant Microsoft security updates that address this vulnerability through proper memory validation and object handling procedures. Organizations should also consider implementing network segmentation and access controls to limit exposure of systems running the Network List Service. The vulnerability demonstrates the importance of proper memory management practices in service components and aligns with ATT&CK technique T1068 which covers 'Exploitation for Privilege Escalation'. Additionally, this vulnerability highlights the need for comprehensive input validation and the implementation of security controls such as Address Space Layout Randomization (ASLR) and Data Execution Prevention (DEP) to mitigate exploitation attempts. System administrators should monitor for unusual network activity related to network list service operations and implement regular security assessments to identify potential exploitation attempts targeting this specific vulnerability.