CVE-2022-33209 in NUC Laptop Kit
Summary
by MITRE • 08/19/2022
Improper input validation in the firmware for some Intel(R) NUC Laptop Kits before version BC0076 may allow a privileged user to potentially enable escalation of privilege via local access.
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Analysis
by VulDB Data Team • 02/18/2025
The vulnerability identified as CVE-2022-33209 represents a critical flaw in the firmware implementation of certain Intel NUC laptop kits. This issue stems from inadequate input validation mechanisms within the firmware components that govern system operations. The vulnerability affects firmware versions prior to BC0076, indicating that Intel has acknowledged and addressed this weakness in their subsequent releases. The nature of the flaw suggests that the firmware fails to properly validate or sanitize inputs received from privileged users, creating potential attack vectors that could be exploited by malicious actors with local access privileges.
The technical exploitation of this vulnerability involves a privilege escalation attack where a locally authenticated user can manipulate firmware validation processes to gain elevated system privileges. This type of flaw typically occurs when firmware components do not adequately verify the integrity or legitimacy of inputs before processing them, allowing attackers to inject malicious data or commands that bypass normal security controls. The vulnerability's classification as a privilege escalation issue places it within the context of CWE-20, which specifically addresses improper input validation as a root cause of security weaknesses. This weakness can manifest through various attack vectors including buffer overflows, format string vulnerabilities, or improper handling of user-supplied data within firmware contexts.
From an operational perspective, this vulnerability poses significant risks to systems running affected firmware versions since it requires only local access to potentially compromise system integrity. Attackers with legitimate user credentials or physical access can leverage this flaw to elevate their privileges and gain unauthorized control over system functions. The impact extends beyond simple privilege escalation as it can potentially enable further exploitation techniques such as rootkit installation, system modification, or data exfiltration. The localized nature of the attack means that network-based exploitation is not required, making this vulnerability particularly concerning for environments where physical security is not adequately maintained.
The security implications of CVE-2022-33209 align with ATT&CK framework techniques related to privilege escalation and firmware manipulation. Specifically, this vulnerability could map to techniques such as T1068 (Local Port Forwarding) and T1542 (Pre-OS Boot) where attackers can manipulate firmware components to establish persistent access. Organizations should consider implementing comprehensive firmware update policies and maintaining inventory control of affected devices to prevent exploitation. The vulnerability also highlights the importance of firmware security practices and the need for regular security assessments of embedded system components. Mitigation strategies should include immediate firmware updates to version BC0076 or later, implementation of access control measures to limit local privileges, and continuous monitoring for suspicious system behavior that might indicate exploitation attempts.
This vulnerability demonstrates the critical importance of firmware security in modern computing environments where traditional operating system security measures may not be sufficient to protect against low-level attacks. The flaw underscores the need for robust input validation at all levels of system architecture, particularly in firmware where the attack surface is often less visible to traditional security tools. Organizations should also consider implementing firmware integrity monitoring solutions and establishing secure boot processes to prevent unauthorized firmware modifications that could exploit this and similar vulnerabilities. The remediation process requires careful coordination between system administrators and firmware vendors to ensure complete protection against this and related privilege escalation threats.