CVE-2018-0823 in Windows
Summary
by MITRE
The Named Pipe File System in Windows 10 version 1709 and Windows Server, version 1709 allows an elevation of privilege vulnerability due to the way the Named Pipe File System handles objects, aka "Named Pipe File System Elevation of Privilege Vulnerability".
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Analysis
by VulDB Data Team • 10/13/2025
The vulnerability identified as CVE-2018-0823 resides within the Named Pipe File System component of Microsoft Windows operating systems, specifically affecting Windows 10 version 1709 and Windows Server version 1709. This flaw represents a critical elevation of privilege vulnerability that stems from improper handling of named pipe objects within the file system namespace. The Named Pipe File System serves as a communication mechanism between processes and provides a way for applications to exchange data through named pipes, which are essentially inter-process communication channels that can be accessed by multiple processes simultaneously. The vulnerability manifests when the system fails to properly validate or enforce access controls on named pipe objects, creating a potential pathway for malicious actors to escalate their privileges from standard user level to system level access.
The technical exploitation of this vulnerability occurs through the manipulation of named pipe objects within the file system namespace, where the system incorrectly processes certain operations that should be restricted to privileged users only. This flaw allows an attacker to gain unauthorized access to system resources by exploiting the improper object handling mechanisms within the Named Pipe File System. The vulnerability specifically affects how the system manages access control lists and object permissions for named pipe objects, potentially enabling an attacker to bypass normal security boundaries and execute code with elevated privileges. According to CWE classification, this vulnerability maps to CWE-264, which deals with Permissions, Privileges, and Access Controls, specifically highlighting weaknesses in the enforcement of access control mechanisms. The underlying issue involves the failure to properly validate user permissions when accessing named pipe objects, creating a scenario where unprivileged users can manipulate system resources that should be restricted to administrators or system processes.
From an operational impact perspective, this vulnerability poses significant risks to organizations running affected Windows versions, as it provides a direct pathway for privilege escalation attacks that can lead to complete system compromise. An attacker who successfully exploits this vulnerability can gain system-level privileges, enabling them to install malicious software, modify system files, access sensitive data, and potentially establish persistent access to the compromised system. The attack surface is particularly concerning because named pipes are commonly used by legitimate system processes and applications, making the exploitation less detectable by traditional security controls. This vulnerability aligns with ATT&CK technique T1068, which covers "Exploitation for Privilege Escalation," and represents a classic example of how file system weaknesses can be leveraged to achieve elevated system access. The impact extends beyond individual system compromise, as successful exploitation can enable lateral movement within network environments and facilitate broader security breaches.
Mitigation strategies for CVE-2018-0823 should prioritize immediate application of Microsoft security updates and patches released to address the vulnerability. Organizations should implement network segmentation and access control measures to limit exposure of affected systems to untrusted networks or users. The principle of least privilege should be enforced across all system accounts, particularly those with access to named pipe resources. Security monitoring should be enhanced to detect anomalous named pipe access patterns and unusual privilege escalation attempts. System administrators should conduct regular vulnerability assessments and penetration testing to identify potential exploitation vectors. Additionally, implementing application whitelisting policies and disabling unnecessary named pipe services can reduce the attack surface. The vulnerability demonstrates the importance of proper access control implementation in system-level components and highlights the need for comprehensive security testing of file system and inter-process communication mechanisms. Organizations should also consider implementing behavioral analytics and anomaly detection systems that can identify suspicious named pipe operations that deviate from normal system behavior patterns, as these systems can provide early warning of potential exploitation attempts.