CWE-1224

Improper Restriction of Write-Once Bit Fields

The hardware design control register "sticky bits" or write-once bit fields are improperly implemented, such that they can be reprogrammed by software.

CVE-2022-23005 (GCVE-0-2022-23005)
Vulnerability from cvelistv5
Published
2023-01-23 00:00
Modified
2025-04-01 19:56
CWE
  • CWE-1224 - Improper Restriction of Write-Once Bit Fields Improper Restriction of Write-Once Bit Fields
  • CWE-1233 - Security-Sensitive Hardware Controls with Missing Lock Bit Protection
  • CWE-1262 - Improper Access Control for Register Interface
Summary
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.
Impacted products
Vendor Product Version
NA NA Version: NA
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Mitigation

Phase: Architecture and Design

Description:

  • During hardware design all register write-once or sticky fields must be evaluated for proper configuration.
Mitigation

Phase: Testing

Description:

  • The testing phase should use automated tools to test that values are not reprogrammable and that write-once fields lock on writing zeros.
CAPEC-680: Exploitation of Improperly Controlled Registers

An adversary exploits missing or incorrectly configured access control within registers to read/write data that is not meant to be obtained or modified by a user.

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