Tên: Security-Sensitive Hardware Controls with Missing Lock Bit Protection

The product uses a register lock bit protection mechanism, but it does not ensure that the lock bit prevents modification of system registers or controls that perform changes to important hardware system configuration.

Thông tin chung

Chi tiết nền tảng

Các cách xuất hiện

Architecture and Design : Such issues could be introduced during hardware architecture and design and identified later during Testing or System Configuration phases.
Implementation : Such issues could be introduced during implementation and identified later during Testing or System Configuration phases.

Nền tảng áp dụng

Ngôn ngữ

Lớp: Not Language-Specific (Undetermined)

Hệ điều hành

Lớp: Not OS-Specific (Undetermined)

Kiến trúc

Lớp: Not Architecture-Specific (Undetermined)

Công nghệ

Lớp: Not Technology-Specific (Undetermined)

Hậu quả phổ biến

Phạm vi	Tác động	Khả năng xảy ra
Access Control	Modify Memory Ghi chú: System Configuration protected by the lock bit can be modified even when the lock is set. If the lock bit does not effectively write-protect all system registers or controls that could modify the protected system configuration, then an adversary may be able to use software to access the registers/controls and modify the protected hardware configuration.

Ví dụ đã quan sát

Tài liệu tham khảo	Mô tả
CVE-2025-61972	Processor product does not perform lock bit protection for certain registers.
CVE-2018-9085	Certain servers leave a write protection lock bit unset after boot, potentially allowing modification of parts of flash memory.
CVE-2014-8273	Chain: chipset has a race condition (CWE-362) between when an interrupt handler detects an attempt to write-enable the BIOS (in violation of the lock bit), and when the handler resets the write-enable bit back to 0, allowing attackers to issue BIOS writes during the timing window [REF-1237].

Các biện pháp giảm thiểu tiềm năng

Phases : Architecture and Design // Implementation // Testing

Phương pháp phát hiện

Manual Analysis

Set the lock bit. Attempt to modify the information protected by the lock bit. If the information is changed, implement a design fix. Retest. Also, attempt to indirectly clear the lock bit or bypass it.
Hiệu quả : High

Ghi chú ánh xạ lỗ hổng

Lý do : This CWE entry is at the Base level of abstraction, which is a preferred level of abstraction for mapping to the root causes of vulnerabilities.
Bình luận : Carefully read both the name and description to ensure that this mapping is an appropriate fit. Do not try to 'force' a mapping to a lower-level Base/Variant simply to comply with this preferred level of abstraction.

Mẫu tấn công liên quan

ID CAPEC	Tên mẫu tấn công
CAPEC-176	Configuration/Environment Manipulation An attacker manipulates files or settings external to a target application which affect the behavior of that application. For example, many applications use external configuration files and libraries - modification of these entities or otherwise affecting the application's ability to use them would constitute a configuration/environment manipulation attack.
CAPEC-680	Exploitation of Improperly Controlled Registers

Tài liệu tham khảo

REF-1237

Intel BIOS locking mechanism contains race condition that enables write protection bypass
CERT Coordination Center.
https://www.kb.cert.org/vuls/id/766164/

Gửi

Tên	Tổ chức	Ngày	Ngày phát hành	Version
Arun Kanuparthi, Hareesh Khattri, Parbati Kumar Manna, Narasimha Kumar V Mangipudi	Intel Corporation	2020-01-15 +00:00	2020-02-24 +00:00	4.0

Sửa đổi

Tên	Tổ chức	Ngày	Bình luận
CWE Content Team	MITRE	2020-08-20 +00:00	updated Related_Attack_Patterns
CWE Content Team	MITRE	2021-03-15 +00:00	updated Maintenance_Notes
CWE Content Team	MITRE	2021-10-28 +00:00	updated Demonstrative_Examples, Description, Detection_Factors, Maintenance_Notes, Name, Observed_Examples, Potential_Mitigations, References, Relationships, Weakness_Ordinalities
CWE Content Team	MITRE	2022-04-28 +00:00	updated Related_Attack_Patterns, Relationships
CWE Content Team	MITRE	2023-04-27 +00:00	updated Relationships
CWE Content Team	MITRE	2023-06-29 +00:00	updated Mapping_Notes
CWE Content Team	MITRE	2025-04-03 +00:00	updated Demonstrative_Examples
CWE Content Team	MITRE	2025-09-09 +00:00	updated Relationships
CWE Content Team	MITRE	2026-10-28 +00:00	updated Background_Details, Common_Consequences, Description, Observed_Examples

Chi tiết CWE-1233

CWE-1233