CVE-2022-23005 in Host Boot ROM
Summary
by MITRE • 01/24/2023
Western Digital has identified a weakness in the UFS standard that could result in a security vulnerability. This vulnerability may exist in some systems where the Host boot ROM code implements the UFS Boot feature to boot from UFS compliant storage devices. The UFS Boot feature, as specified in the UFS standard, is provided by UFS devices to support platforms that need to download the system boot loader from external non-volatile storage locations. Several scenarios have been identified in which adversaries may disable the boot capability, or revert to an old boot loader code, if the host boot ROM code is improperly implemented. UFS Host Boot ROM implementers may be impacted by this vulnerability. UFS devices are only impacted when connected to a vulnerable UFS Host and are not independently impacted by this vulnerability. When present, the vulnerability is in the UFS Host implementation and is not a vulnerability in Western Digital UFS Devices. Western Digital has provided details of the vulnerability to the JEDEC standards body, multiple vendors of host processors, and software solutions providers.
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Analysis
by VulDB Data Team • 04/29/2026
The vulnerability described in CVE-2022-23005 represents a critical security flaw within the Universal Flash Storage (UFS) standard implementation, specifically affecting systems that utilize UFS Boot functionality for system initialization. This weakness manifests in the host boot ROM code's improper implementation of UFS Boot features, creating potential attack vectors that could compromise system integrity and security posture. The vulnerability stems from the UFS standard's specification for booting from external non-volatile storage, a feature designed to support platforms requiring system boot loader downloads from UFS-compliant devices. The flaw becomes particularly significant when considering that UFS devices themselves remain unaffected, with the vulnerability residing solely within the host implementation rather than in Western Digital's UFS storage devices. This distinction is crucial for understanding the scope and impact of the vulnerability, as it indicates that the security risk is not inherent to the storage technology itself but rather in how host systems implement the standard.
The technical nature of this vulnerability aligns with CWE-284, which addresses improper access control mechanisms, and CWE-310, focusing on cryptographic issues. The flaw enables adversaries to potentially disable boot capabilities or revert to older boot loader versions, effectively undermining the system's security chain of trust. The UFS Boot feature, as defined in the standard, should provide secure boot capabilities, but the improper implementation in host ROM code creates opportunities for attackers to manipulate the boot process. This vulnerability is particularly concerning because it operates at the firmware level, where traditional software security measures may not be effective. The attack surface expands when considering that multiple vendors of host processors and software solutions providers have been notified, indicating that this is not an isolated issue but a widespread concern affecting various system implementations. The vulnerability's impact is conditional upon the presence of a vulnerable UFS Host, making it essential for system administrators to assess their specific implementations and ensure proper UFS Boot ROM code deployment.
The operational impact of CVE-2022-23005 extends beyond simple system availability concerns, potentially enabling complete system compromise through boot process manipulation. Adversaries could exploit this vulnerability to install malicious boot loaders, effectively creating persistent backdoors within affected systems. The vulnerability's presence in host boot ROM code means that traditional operating system security measures may be insufficient to prevent exploitation, as the attack occurs at a lower system level. This characteristic places the vulnerability in the ATT&CK framework under T1068, which addresses local privilege escalation, and T1542, covering exploitation for privilege escalation. The security implications are particularly severe for environments where system integrity and boot security are paramount, such as enterprise servers, embedded systems, and IoT devices that rely on UFS storage for boot operations. Organizations implementing UFS Boot functionality must recognize that this vulnerability could enable attackers to bypass standard security controls and establish unauthorized system access. The fact that Western Digital has reported this issue to JEDEC standards body and multiple vendors indicates the severity of the problem and the need for coordinated industry response to address the vulnerability across different implementations.
Mitigation strategies for CVE-2022-23005 require focused attention on host boot ROM implementations and proper UFS Boot feature configuration. System administrators should prioritize updating firmware and boot ROM code to versions that properly implement UFS Boot specifications according to the latest standards. The vulnerability's nature suggests that implementing proper access controls within the UFS Boot implementation, including secure boot mechanisms and integrity verification processes, should be prioritized. Organizations should conduct thorough assessments of their UFS Host implementations to identify any non-compliant code that could be exploited. Security measures should include monitoring for unauthorized boot loader modifications and implementing robust integrity checking mechanisms that verify boot loader authenticity. The vulnerability's conditional nature means that systems not utilizing UFS Boot functionality may be unaffected, but this should not be assumed without proper verification. Vendor-specific patches and firmware updates should be applied promptly, and system administrators should monitor for additional guidance from affected hardware and software vendors. Implementing layered security approaches that include hardware-based security features, proper access controls, and regular security assessments will help mitigate the risk associated with this vulnerability while maintaining system functionality and performance.