CVE-2016-3341 in Windows
Summary
by MITRE
The kernel-mode drivers in Transaction Manager in Microsoft Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, and Windows 10 Gold, 1511, and 1607 allow local users to gain privileges via a crafted application, aka "Windows Transaction Manager Elevation of Privilege Vulnerability."
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Analysis
by VulDB Data Team • 09/23/2022
The Windows Transaction Manager represents a critical subsystem within Microsoft operating systems that facilitates atomic operations across multiple resources, ensuring data consistency and integrity in distributed environments. This vulnerability affects kernel-mode drivers responsible for managing transactional operations, creating a pathway for local privilege escalation attacks. The flaw exists within the transaction manager's handling of kernel-mode components that process transactional requests, allowing malicious applications to exploit improper validation mechanisms in the driver code. This represents a fundamental failure in the operating system's privilege separation model, where unprivileged user applications can manipulate kernel-level transactional processes to elevate their privileges to system level.
The technical implementation of this vulnerability stems from insufficient input validation within the kernel-mode transaction manager drivers. When processing transactional operations, the system fails to properly validate the integrity of transactional metadata and operation parameters, allowing crafted malicious inputs to manipulate the transaction state machine. The vulnerability specifically manifests in how the transaction manager handles certain transactional resource acquisition and release operations, where improper bounds checking and validation of user-supplied parameters leads to memory corruption. Attackers can leverage this by creating specially crafted transactional operations that, when processed by the vulnerable kernel drivers, cause the system to execute arbitrary code with elevated privileges. This flaw operates at the kernel level, bypassing standard user-mode security controls and access protection mechanisms that typically prevent privilege escalation.
The operational impact of this vulnerability extends far beyond simple privilege escalation, as it provides attackers with complete system compromise capabilities. Once successfully exploited, local users can gain SYSTEM-level privileges, enabling them to modify system files, disable security features, install malicious software, and access all user data on the system. The vulnerability affects multiple Windows versions simultaneously, creating a widespread attack surface across enterprise and consumer environments. Organizations running affected systems face significant risk as attackers can leverage this vulnerability to establish persistent access, conduct data exfiltration, or deploy additional malware. The exploitability of this vulnerability is relatively straightforward, requiring only local system access and the ability to run malicious applications, making it particularly dangerous in environments where users have standard account privileges but may be targeted by social engineering attacks.
Mitigation strategies for this vulnerability involve implementing multiple layers of protection including immediate patch deployment through Microsoft security updates, which address the underlying driver validation issues. System administrators should disable unnecessary transactional services and implement strict access controls to limit potential attack vectors. The principle of least privilege should be enforced by restricting user account permissions and monitoring transactional operations for anomalous behavior. Network segmentation and endpoint protection solutions can help detect exploitation attempts by monitoring for suspicious transactional operations or privilege escalation activities. Organizations should also implement regular vulnerability assessments to identify systems running affected Windows versions and ensure timely patch management processes are in place. This vulnerability aligns with CWE-122 which describes improper restriction of operations within a recognized security boundary, and maps to ATT&CK technique T1068 which covers "Exploitation for Privilege Escalation" and T1059 which covers "Command and Scripting Interpreter" as attackers may use the elevated privileges to execute additional malicious commands.