Tên: Comparison Logic is Vulnerable to Power Side-Channel Attacks

A device's real time power consumption may be monitored during security token evaluation and the information gleaned may be used to determine the value of the reference token.

Thông tin chung

Các cách xuất hiện

Architecture and Design : The design of the algorithm itself may intrinsically allow the power side channel attack to be effective.
Implementation : This weakness may be introduced during implementation despite a robust design that otherwise prevents exploitation.

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
Confidentiality Integrity Availability Access Control Accountability Authentication Authorization Non-Repudiation	Modify Memory, Read Memory, Read Files or Directories, Modify Files or Directories, Execute Unauthorized Code or Commands, Gain Privileges or Assume Identity, Bypass Protection Mechanism, Read Application Data, Modify Application Data, Hide Activities Ghi chú: The power consumed by a device may be instrumented and monitored in real time. If the algorithm for evaluating security tokens is not sufficiently robust, the power consumption may vary by token entry comparison against the reference value. Further, if retries are unlimited, the power difference between a "good" entry and a "bad" entry may be observed and used to determine whether each entry itself is correct thereby allowing unauthorized parties to calculate the reference value. As compromising a security token may result in complete system control, the impacts are relatively universal.

Ví dụ đã quan sát

Tài liệu tham khảo	Mô tả
CVE-2020-12788	CMAC verification vulnerable to timing and power attacks.

Các biện pháp giảm thiểu tiềm năng

Phases : Architecture and Design
The design phase must consider each check of a security token against a standard and the amount of power consumed during the check of a good token versus a bad token. The alternative is an all at once check where a retry counter is incremented PRIOR to the check.
Phases : Architecture and Design
Another potential mitigation is to parallelize shifting of secret data (see example 2 below). Note that the wider the bus the more effective the result.
Phases : Architecture and Design
An additional potential mitigation is to add random data to each crypto operation then subtract it out afterwards. This is highly effective but costly in performance, area, and power consumption. It also requires a random number generator.
Phases : Implementation
If the architecture is unable to prevent the attack, using filtering components may reduce the ability to implement an attack, however, consideration must be given to the physical removal of the filter elements.
Phases : Integration
During integration, avoid use of a single secret for an extended period (e.g. frequent key updates). This limits the amount of data compromised but at the cost of complexity of use.

Ghi chú ánh xạ lỗ hổng

Lý do : This CWE entry is at the Variant 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-189	Black Box Reverse Engineering An adversary discovers the structure, function, and composition of a type of computer software through black box analysis techniques. 'Black Box' methods involve interacting with the software indirectly, in the absence of direct access to the executable object. Such analysis typically involves interacting with the software at the boundaries of where the software interfaces with a larger execution environment, such as input-output vectors, libraries, or APIs. Black Box Reverse Engineering also refers to gathering physical side effects of a hardware device, such as electromagnetic radiation or sounds.

Tài liệu tham khảo

REF-1184

Power Analysis
Wikipedia.
https://en.wikipedia.org/wiki/Power_analysis

Gửi

Tên	Tổ chức	Ngày	Ngày phát hành	Version
CWE Content Team	MITRE	2020-05-29 +00:00	2020-08-20 +00:00	4.2

Sửa đổi

Tên	Tổ chức	Ngày	Bình luận
CWE Content Team	MITRE	2021-03-15 +00:00	updated Functional_Areas, Maintenance_Notes, Relationships
CWE Content Team	MITRE	2021-07-20 +00:00	updated Demonstrative_Examples, Modes_of_Introduction, Observed_Examples, Potential_Mitigations, References, Related_Attack_Patterns
CWE Content Team	MITRE	2021-10-28 +00:00	updated Maintenance_Notes, References, Relationships, Type
CWE Content Team	MITRE	2022-06-28 +00:00	updated Relationships
CWE Content Team	MITRE	2022-10-13 +00:00	updated Demonstrative_Examples
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	2024-02-29 +00:00	updated Demonstrative_Examples
CWE Content Team	MITRE	2025-12-11 +00:00	updated Weakness_Ordinalities
CWE Content Team	MITRE	2026-10-28 +00:00	updated Common_Consequences, Description

Chi tiết CWE-1255

CWE-1255