Detalle CWE-1254

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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Nombre: 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.

Informaciones generales

Modos de introducción

Architecture and Design
Implementation

Plataformas aplicables

Lenguaje

Class: Not Language-Specific (Undetermined)

Sistemas operativos

Class: Not OS-Specific (Undetermined)

Arquitecturas

Class: Not Architecture-Specific (Undetermined)

Tecnologías

Class: Not Technology-Specific (Undetermined)

Consecuencias comunes

Alcance Impacto Probabilidad
Confidentiality
Authorization		Bypass Protection Mechanism

Ejemplos observados

Referencias Descripción

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.

Mitigaciones potenciales

Phases : Implementation

Notas de mapeo de vulnerabilidades

Justificación : 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.
Comentario : 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.

Patrones de ataque relacionados

CAPEC-ID Nombre del patrón 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.

Referencias

REF-1079

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

Envío

Nombre Organización Fecha Fecha de lanzamiento 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

Modificaciones

Nombre Organización Fecha Comentario
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
La información presentada en CVE Find proviene de varias fuentes de referencia cuidadosamente seleccionadas. Los datos CVE son proporcionados por MITRE Corporation y la Base de Datos Nacional de Vulnerabilidades (NVD). El catálogo de Vulnerabilidades Explotadas Conocidas (KEV) proviene de la Agencia de Seguridad de Infraestructura y Ciberseguridad (CISA), mientras que las puntuaciones EPSS provienen de FIRST.org. Además, los datos sobre debilidades de software (CWE) y patrones de ataque comunes (CAPEC) son mantenidos por MITRE Corporation, y la información sobre configuraciones de hardware y software (CPE) es proporcionada por la NVD.