Modes Of Introduction
Architecture and Design
Implementation
System Configuration
Applicable Platforms
Language
Class: Not Language-Specific (Undetermined)
Operating Systems
Class: Not OS-Specific (Undetermined)
Architectures
Class: Not Architecture-Specific (Undetermined)
Technologies
Class: Not Technology-Specific (Undetermined)
Common Consequences
Scope |
Impact |
Likelihood |
Access Control | Modify Memory, Read Memory, Bypass Protection Mechanism | |
Potential Mitigations
Phases : Architecture and Design
For responder devices, the register bit in the fabric end-point that enables the bus controlling capability must be set to 0 by default. This bit should not be set during secure-boot flows. Also, writes to this register must be access-protected to prevent malicious modifications to obtain bus-controlling capability.
Phases : Implementation
For responder devices, the register bit in the fabric end-point that enables the bus controlling capability must be set to 0 by default. This bit should not be set during secure-boot flows. Also, writes to this register must be access-protected to prevent malicious modifications to obtain bus-controlling capability.
Phases : System Configuration
For responder devices, the register bit in the fabric end-point that enables the bus controlling capability must be set to 0 by default. This bit should not be set during secure-boot flows. Also, writes to this register must be access-protected to prevent malicious modifications to obtain bus-controlling capability.
Vulnerability Mapping Notes
Rationale : 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.
Comments : 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.
Related Attack Patterns
CAPEC-ID |
Attack Pattern Name |
CAPEC-1 |
Accessing Functionality Not Properly Constrained by ACLs In applications, particularly web applications, access to functionality is mitigated by an authorization framework. This framework maps Access Control Lists (ACLs) to elements of the application's functionality; particularly URL's for web apps. In the case that the administrator failed to specify an ACL for a particular element, an attacker may be able to access it with impunity. An attacker with the ability to access functionality not properly constrained by ACLs can obtain sensitive information and possibly compromise the entire application. Such an attacker can access resources that must be available only to users at a higher privilege level, can access management sections of the application, or can run queries for data that they otherwise not supposed to. |
CAPEC-180 |
Exploiting Incorrectly Configured Access Control Security Levels An attacker exploits a weakness in the configuration of access controls and is able to bypass the intended protection that these measures guard against and thereby obtain unauthorized access to the system or network. Sensitive functionality should always be protected with access controls. However configuring all but the most trivial access control systems can be very complicated and there are many opportunities for mistakes. If an attacker can learn of incorrectly configured access security settings, they may be able to exploit this in an attack. |
References
REF-1135
Bypassing IOMMU Protection against I/O Attacks
Benoit Morgan, Eric Alata, Vincent Nicomette, Mohamed Kaaniche.
https://hal.archives-ouvertes.fr/hal-01419962/document REF-1136
Exploitation from malicious PCI Express peripherals
Colin L. Rothwell.
https://www.cl.cam.ac.uk/techreports/UCAM-CL-TR-934.pdf
Submission
Name |
Organization |
Date |
Date Release |
Version |
Arun Kanuparthi, Hareesh Khattri, Parbati K. Manna |
Intel Corporation |
2020-05-19 +00:00 |
2020-12-10 +00:00 |
4.3 |
Modifications
Name |
Organization |
Date |
Comment |
CWE Content Team |
MITRE |
2021-10-28 +00:00 |
updated Maintenance_Notes |
CWE Content Team |
MITRE |
2023-04-27 +00:00 |
updated Relationships |
CWE Content Team |
MITRE |
2023-06-29 +00:00 |
updated Mapping_Notes |