CVE-2017-3741 in Power Management Driver
Summary
by MITRE
In the Lenovo Power Management driver before 1.67.12.24, a local user may alter the trackpoint's firmware and stop the trackpoint from functioning correctly. This issue only affects ThinkPad X1 Carbon 5th generation.
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Analysis
by VulDB Data Team • 10/13/2019
The vulnerability identified as CVE-2017-3741 represents a critical security flaw within the Lenovo Power Management driver ecosystem that specifically targets the trackpoint functionality on certain ThinkPad devices. This issue affects the ThinkPad X1 Carbon 5th generation models and stems from inadequate firmware update mechanisms that permit unauthorized modification of trackpoint configuration parameters. The flaw resides in the driver's failure to properly validate and restrict access to trackpoint firmware interfaces, creating a path for local privilege escalation through unauthorized firmware manipulation.
The technical implementation of this vulnerability involves the exploitation of insufficient access controls within the Power Management driver component. When a local user executes malicious code or utilizes specific driver interfaces, they can bypass normal operational constraints and modify trackpoint firmware settings that should remain protected from user intervention. This vulnerability maps to CWE-284, which describes improper access control mechanisms, and specifically relates to the lack of proper privilege separation between user-level processes and hardware configuration interfaces. The trackpoint firmware modification capability essentially allows an attacker to disable or corrupt the trackpoint functionality entirely, rendering the pointing device non-operational.
From an operational perspective, this vulnerability creates a persistent threat vector that can be exploited by malicious actors with local system access. The impact extends beyond simple usability issues as the trackpoint is a critical input mechanism for ThinkPad users, particularly in enterprise environments where these devices are commonly deployed. The vulnerability's localized nature to the 5th generation X1 Carbon models means that attackers must first compromise a target system running these specific hardware configurations, but once achieved, they can effectively disable a core user interface component. This aligns with ATT&CK technique T1068, which covers local privilege escalation through exploitation of system vulnerabilities, and T1566, which addresses social engineering and system compromise through targeted attacks on specific device types.
The mitigation strategy for this vulnerability requires immediate deployment of Lenovo's official driver update version 1.67.12.24, which addresses the firmware access control flaw through enhanced validation mechanisms and proper privilege enforcement. System administrators should also implement comprehensive patch management protocols to ensure all affected ThinkPad X1 Carbon 5th generation devices receive the necessary security updates. Additional protective measures include monitoring for unauthorized driver modifications and implementing application whitelisting policies that restrict access to trackpoint configuration interfaces. Organizations should also consider conducting security assessments of their ThinkPad fleets to identify and remediate any other potential vulnerabilities related to hardware management drivers. The vulnerability demonstrates the importance of securing hardware-level interfaces and maintaining proper access controls even within trusted system components, as these interfaces often provide pathways for more sophisticated attacks that could compromise system integrity and user productivity.