CVE-2017-0211 in Windows
Summary
by MITRE
An elevation of privilege vulnerability exists in Windows 10, Windows 8.1, Windows RT 8.1, Windows Server 2012, Windows Server 2012 R2, and Windows Server 2016 versions of Microsoft Windows OLE when it fails an integrity-level check, aka "Windows OLE Elevation of Privilege Vulnerability."
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Analysis
by VulDB Data Team • 12/23/2024
The vulnerability identified as CVE-2017-0211 represents a critical elevation of privilege flaw within Microsoft Windows operating systems that affects multiple versions including Windows 10, Windows 8.1, Windows RT 8.1, Windows Server 2012, Windows Server 2012 R2, and Windows Server 2016. This weakness resides in the Object Linking and Embedding (OLE) component of the Windows operating system, which is responsible for enabling applications to embed and link to objects from other applications. The vulnerability stems from a failure in integrity-level checks that should normally prevent untrusted code from executing with elevated privileges, creating a significant security gap that adversaries can exploit to gain unauthorized access to system resources.
The technical flaw manifests when the Windows OLE subsystem fails to properly validate the integrity level of embedded objects before executing them, allowing malicious actors to craft specially crafted documents or files that contain OLE objects designed to bypass security restrictions. This vulnerability specifically relates to how the system handles object activation and execution contexts, where the integrity checks that should enforce security boundaries between different privilege levels are insufficient or improperly implemented. The flaw enables attackers to execute arbitrary code with the privileges of the target user, potentially escalating from standard user access to system-level privileges depending on the target environment and user permissions.
From an operational impact perspective, this vulnerability poses severe risks to enterprise environments where Windows systems are prevalent, as successful exploitation can lead to complete system compromise and persistent access to sensitive data and network resources. The attack surface is particularly broad given that OLE is widely used across Microsoft Office applications, web browsers, and various system components that handle embedded objects. Security researchers have noted that this vulnerability can be exploited through various vectors including malicious email attachments, compromised websites, or infected removable media, making it particularly dangerous in targeted attack scenarios. The vulnerability's impact is further amplified by the fact that it can be exploited without user interaction in certain conditions, making detection and prevention more challenging for security teams.
Mitigation strategies for CVE-2017-0211 should prioritize immediate patch deployment through Microsoft's regular security updates, as the primary fix involves correcting the integrity check implementation within the OLE subsystem. Organizations should implement additional defensive measures including network segmentation, application whitelisting policies, and enhanced email filtering to reduce the likelihood of successful exploitation. The vulnerability aligns with CWE-284, which describes improper access control issues, and maps to ATT&CK technique T1068, involving local privilege escalation through system weaknesses. Security teams should also consider implementing monitoring solutions that can detect anomalous OLE object behavior and unusual privilege escalation attempts, while maintaining comprehensive incident response procedures to address potential exploitation attempts. The vulnerability serves as a reminder of the critical importance of maintaining up-to-date security patches and implementing defense-in-depth strategies to protect against sophisticated attack vectors targeting fundamental operating system components.