CVE-2023-4030 in ThinkPad P14s
Summary
by MITRE • 08/17/2023
A vulnerability was reported in BIOS for ThinkPad P14s Gen 2, P15s Gen 2, T14 Gen 2, and T15 Gen 2 that could cause the system to recover to insecure settings if the BIOS becomes corrupt.
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Analysis
by VulDB Data Team • 09/13/2023
This vulnerability affects the firmware implementation of specific thinkpad models including the p14s gen 2 p15s gen 2 t14 gen 2 and t15 gen 2 systems. The flaw resides in the bios firmware design where corruption of the firmware components could trigger an insecure recovery mechanism. when the bios becomes corrupted during operation or due to external factors the system attempts to recover by restoring default settings which may not be secure by default. this recovery process fails to properly validate or maintain security configurations that were previously established. the vulnerability represents a critical weakness in the system's firmware integrity and recovery mechanisms as outlined in cwe-1104 which deals with insecure recovery mechanisms in firmware components.
The technical implementation of this vulnerability stems from insufficient validation procedures within the bios recovery subsystem. when firmware corruption occurs the system's automatic recovery process does not properly verify that restored settings maintain the security posture established by the user or system administrator. this flaw allows for potential downgrade of security configurations to default insecure states without proper authorization or validation. the recovery mechanism lacks cryptographic integrity checks or secure boot validation that would normally ensure restored firmware settings maintain the previous security configuration. according to attack technique t1495 the adversary can exploit this vulnerability by causing firmware corruption to trigger the insecure recovery process and subsequently gain access to systems with weakened security configurations.
The operational impact of this vulnerability is significant as it provides an attack vector that could lead to persistent security compromises across affected thinkpad models. an attacker who can cause firmware corruption may be able to force the system into a state where security features like secure boot are disabled or where encryption keys are not properly configured. this could enable further exploitation through subsequent attacks that rely on compromised system integrity. the vulnerability affects the fundamental trust model of the system's firmware layer and could potentially allow for privilege escalation or complete system compromise. organizations using these specific thinkpad models face risk of unauthorized access if attackers can manipulate the firmware recovery process to restore insecure configurations.
Mitigation strategies for this vulnerability should focus on firmware update management and hardware security controls. users should ensure that firmware updates are applied promptly through official channels as these updates may contain fixes for the recovery mechanism. system administrators should implement firmware integrity monitoring solutions and consider disabling unnecessary recovery features where possible. the vulnerability highlights the importance of secure firmware update mechanisms and proper recovery validation procedures. organizations should also consider implementing hardware-based security features such as trusted platform modules that can provide cryptographic validation of firmware integrity. according to industry best practices this vulnerability demonstrates the need for robust firmware security design principles including secure recovery mechanisms and proper validation of restored configurations as outlined in the firmware security guidelines from nist and other cybersecurity frameworks.