名稱: Fabric-Address Map Allows Programming of Unwarranted Overlaps of Protected and Unprotected Ranges

The address map of the on-chip fabric has protected and unprotected regions overlapping, allowing an attacker to bypass access control to the overlapping portion of the protected region.

一般資訊

背景詳情

引入方式

Architecture and Design
Implementation

適用平台

程式語言

類別： Not Language-Specific (Undetermined)

作業系統

類別： Not OS-Specific (Undetermined)

架構

類別： Not Architecture-Specific (Undetermined)

技術

名稱： Bus/Interface Hardware (Undetermined)
類別： Not Technology-Specific (Undetermined)

常見後果

範圍	影響	可能性
Confidentiality Integrity Access Control Authorization	Bypass Protection Mechanism, Read Memory, Modify Memory 注意：When protected and unprotected ranges overlap, an attacker could send a transaction and potentially compromise the protections in place, violating the principle of least privilege.	Medium

觀察到的案例

參考資料	描述
CVE-2009-4419	Attacker can modify MCHBAR register to overlap with an attacker-controlled region, which modification prevents the SENTER instruction from properly applying VT-d protection while a Measured Launch Environment is being launched.

潛在緩解措施

Phases : Architecture and Design
When architecting the address map of the chip, ensure that protected and unprotected ranges are isolated and do not overlap. When designing, ensure that ranges hardcoded in Register-Transfer Level (RTL) do not overlap.
Phases : Implementation
Ranges configured by firmware should not overlap. If overlaps are mandatory because of constraints such as a limited number of registers, then ensure that no assets are present in the overlapped portion.
Phases : Testing
Validate mitigation actions with robust testing.

偵測方法

Automated Dynamic Analysis

Review address map in specification to see if there are any overlapping ranges.
有效性 : High

Manual Static Analysis

Negative testing of access control on overlapped ranges.
有效性 : High

漏洞對應備注

理由說明 : 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.
備註 : 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.

備注

As of CWE 4.6, CWE-1260 and CWE-1316 are siblings under view 1000, but CWE-1260 might be a parent of CWE-1316. More analysis is warranted.

參考資料

REF-1137

BARing the System - New vulnerabilities in Coreboot & UEFI-based Systems
Yuriy Bulygin, Oleksandr Bazhaniuk, Andrew Furtak, John Loucaides, Mikhail Gorobets.
https://www.c7zero.info/stuff/REConBrussels2017_BARing_the_system.pdf

提交

名稱	機構	日期	發布日期	Version
Arun Kanuparthi, Hareesh Khattri, Parbati Kumar Manna	Intel Corporation	2020-06-01 +00:00	2020-12-10 +00:00	4.3

修改記錄

名稱	機構	日期	備註
CWE Content Team	MITRE	2021-10-28 +00:00	updated Maintenance_Notes
CWE Content Team	MITRE	2022-04-28 +00:00	updated Applicable_Platforms, Related_Attack_Patterns
CWE Content Team	MITRE	2022-06-28 +00:00	updated Applicable_Platforms
CWE Content Team	MITRE	2022-10-13 +00:00	updated References
CWE Content Team	MITRE	2023-01-31 +00:00	updated Related_Attack_Patterns
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	2025-12-11 +00:00	updated Weakness_Ordinalities
CWE Content Team	MITRE	2026-10-28 +00:00	updated Background_Details, Common_Consequences, Description

CAPEC ID	攻擊模式名稱
CAPEC-456	Infected Memory An adversary inserts malicious logic into memory enabling them to achieve a negative impact. This logic is often hidden from the user of the system and works behind the scenes to achieve negative impacts. This pattern of attack focuses on systems already fielded and used in operation as opposed to systems that are still under development and part of the supply chain.
CAPEC-679	Exploitation of Improperly Configured or Implemented Memory Protections

CWE-1316 詳細資料

CWE-1316