Nama: 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.

Informasi Umum

Mode Pengenalan

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.

Platform yang Berlaku

Bahasa

Kelas: Not Language-Specific (Undetermined)

Sistem Operasi

Kelas: Not OS-Specific (Undetermined)

Arsitektur

Kelas: Not Architecture-Specific (Undetermined)

Teknologi

Kelas: Not Technology-Specific (Undetermined)

Konsekuensi Umum

Cakupan	Dampak	Kemungkinan
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 Catatan: 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.

Contoh yang Diamati

Referensi	Deskripsi
CVE-2020-12788	CMAC verification vulnerable to timing and power attacks.

Mitigasi yang Memungkinkan

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.

Catatan Pemetaan Kerentanan

Justifikasi : 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.
Komentar : 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.

Pola Serangan Terkait

CAPEC ID	Nama Pola Serangan
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.

Referensi

REF-1184

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

Pengajuan

Nama	Organisasi	Tanggal	Tanggal rilis	Version
CWE Content Team	MITRE	2020-05-29 +00:00	2020-08-20 +00:00	4.2

Modifikasi

Nama	Organisasi	Tanggal	Komentar
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

Detail CWE-1255

CWE-1255