CVE-2016-0051 in Windows
Summary
by MITRE
The WebDAV client in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, and Windows 10 Gold and 1511 allows local users to gain privileges via a crafted application, aka "WebDAV Elevation of Privilege Vulnerability."
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 11/03/2024
The WebDAV Elevation of Privilege Vulnerability identified as CVE-2016-0051 represents a critical security flaw within Microsoft Windows operating systems that affects multiple versions including Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012, Windows RT 8.1, and Windows 10. This vulnerability specifically targets the WebDAV client component that handles distributed authoring and versioning protocols, which are commonly used for file sharing and collaborative document management across networked environments. The flaw allows local attackers to escalate their privileges from standard user level to system level access through the exploitation of a crafted application that leverages the WebDAV client functionality.
The technical implementation of this vulnerability stems from improper validation of file paths and access controls within the WebDAV client implementation. When a malicious application interacts with the WebDAV client, it can manipulate the client's handling of file operations to bypass normal security restrictions. The vulnerability manifests when the WebDAV client processes specially crafted file references or network paths that trigger an incorrect privilege escalation mechanism. This flaw falls under the Common Weakness Enumeration category CWE-264, which specifically addresses permissions, privileges, and access control issues in software implementations. The vulnerability enables attackers to execute arbitrary code with elevated privileges, effectively allowing them to bypass the standard security boundaries that normally protect system resources and user data.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it provides attackers with comprehensive system control capabilities that can lead to complete system compromise. Once an attacker successfully exploits this vulnerability, they can access sensitive system files, modify critical registry entries, install malicious software, and potentially establish persistent backdoors within the compromised system. The vulnerability affects both desktop and server environments, making it particularly dangerous for enterprise networks where Windows servers often serve as central repositories for corporate data. From an adversarial perspective, this vulnerability aligns with ATT&CK technique T1068, which covers "Exploitation for Privilege Escalation," and T1059, covering "Command and Scripting Interpreter," as attackers can leverage the elevated privileges to execute additional malicious activities. The widespread availability of this vulnerability across multiple Windows versions means that organizations with legacy systems or those that have not applied security updates are particularly at risk.
Organizations can mitigate this vulnerability through several defensive measures including immediate application of Microsoft security patches and updates released to address the flaw. The vulnerability requires a local attacker with valid user credentials to exploit, but once successful, it provides complete system compromise. System administrators should implement the principle of least privilege, ensuring that users have only the minimum permissions necessary to perform their tasks. Network segmentation and monitoring for unusual WebDAV traffic patterns can help detect potential exploitation attempts. Additionally, disabling unnecessary WebDAV functionality on systems where it is not required provides an additional layer of defense. Regular security assessments and vulnerability scanning should include checks for this specific vulnerability, and organizations should maintain up-to-date incident response procedures to address potential exploitation attempts. The vulnerability also highlights the importance of maintaining current security patches across all Windows environments, as delayed patching creates extended windows of opportunity for attackers to exploit known vulnerabilities.