CWE-1254 Detalhe

CWE-1254

Incorrect Comparison Logic Granularity
Draft
2020-02-24
00h00 +00:00
2025-12-11
00h00 +00:00
CWE Mitre.org
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Nome: Incorrect Comparison Logic Granularity

The product's comparison logic is performed over a series of steps rather than across the entire string in one operation. If there is a comparison logic failure on one of these steps, the operation may be vulnerable to a timing attack that can result in the interception of the process for nefarious purposes.

Informações Gerais

Modos de Introdução

Architecture and Design
Implementation

Plataformas Aplicáveis

Linguagem

Class: Not Language-Specific (Undetermined)

Sistemas Operacionais

Class: Not OS-Specific (Undetermined)

Arquiteturas

Class: Not Architecture-Specific (Undetermined)

Tecnologias

Class: Not Technology-Specific (Undetermined)

Consequências Comuns

Escopo Impacto Probabilidade
Confidentiality
Authorization		Bypass Protection Mechanism

Exemplos Observados

Referências Descrição

CVE-2019-10482

Smartphone OS uses comparison functions that are not in constant time, allowing side channels

CVE-2019-10071

Java-oriented framework compares HMAC signatures using String.equals() instead of a constant-time algorithm, causing timing discrepancies

CVE-2014-0984

Password-checking function in router terminates validation of a password entry when it encounters the first incorrect character, which allows remote attackers to obtain passwords via a brute-force attack that relies on timing differences in responses to incorrect password guesses, aka a timing side-channel attack.

Mitigações Potenciais

Phases : Implementation

Notas de Mapeamento de Vulnerabilidade

Justificativa : 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.
Comentário : 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.

Padrões de Ataque Relacionados

CAPEC-ID Nome do Padrão de Ataque
CAPEC-26 Leveraging Race Conditions
The adversary targets a race condition occurring when multiple processes access and manipulate the same resource concurrently, and the outcome of the execution depends on the particular order in which the access takes place. The adversary can leverage a race condition by "running the race", modifying the resource and modifying the normal execution flow. For instance, a race condition can occur while accessing a file: the adversary can trick the system by replacing the original file with their version and cause the system to read the malicious file.

Notas

CWE 4.16 removed a demonstrative example for a hardware module because it was inaccurate and unable to be adapted. The CWE team is developing an alternative.

Referências

REF-1079

SCA4n00bz - Timing-based Sidechannel Attacks for Hardware N00bz workshop
Joe Fitzpatrick.
https://github.com/securelyfitz/SCA4n00bz

Submissão

Nome Organização Data Data de lançamento Version
Arun Kanuparthi, Hareesh Khattri, Parbati Kumar Manna, Narasimha Kumar V Mangipudi Intel Corporation 2020-02-12 +00:00 2020-02-24 +00:00 4.1

Modificações

Nome Organização Data Comentário
CWE Content Team MITRE 2020-08-20 +00:00 updated Relationships
CWE Content Team MITRE 2021-07-20 +00:00 updated Related_Attack_Patterns
CWE Content Team MITRE 2022-10-13 +00:00 updated Demonstrative_Examples
CWE Content Team MITRE 2023-04-27 +00:00 updated Observed_Examples, Relationships
CWE Content Team MITRE 2023-06-29 +00:00 updated Mapping_Notes
CWE Content Team MITRE 2023-10-26 +00:00 updated Demonstrative_Examples, Observed_Examples
CWE Content Team MITRE 2024-11-19 +00:00 updated Demonstrative_Examples, Maintenance_Notes
CWE Content Team MITRE 2025-12-11 +00:00 updated Weakness_Ordinalities
As informações apresentadas no CVE Find originam-se de várias fontes de referência cuidadosamente selecionadas. Os dados CVE são fornecidos pela MITRE Corporation e pelo National Vulnerability Database (NVD). O catálogo de Vulnerabilidades Conhecidas Exploradas (KEV) é proveniente da Cybersecurity and Infrastructure Security Agency (CISA), enquanto as pontuações EPSS vêm do FIRST.org. Além disso, os dados sobre fraquezas de software (CWE) e padrões de ataque comuns (CAPEC) são mantidos pela MITRE Corporation, e as informações sobre configurações de hardware e software (CPE) são fornecidas pelo NVD.