Detalle CWE-1241

CWE-1241

Use of Predictable Algorithm in Random Number Generator
Draft
2020-02-24
00h00 +00:00
2025-12-11
00h00 +00:00
CWE Mitre.org
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Nombre: Use of Predictable Algorithm in Random Number Generator

The device uses an algorithm that is predictable and generates a pseudo-random number.

Informaciones generales

Modos de introducción

Architecture and Design
Implementation : In many cases, the design originally defines a cryptographically secure random number generator, but is then changed during implementation due to unforeseen constraints.

Plataformas aplicables

Tecnologías

Class: System on Chip (Undetermined)

Consecuencias comunes

Alcance Impacto Probabilidad
ConfidentialityRead Application DataHigh

Ejemplos observados

Referencias Descripción

CVE-2021-3692

PHP framework uses mt_rand() function (Marsenne Twister) when generating tokens

Mitigaciones potenciales

Phases : Architecture and Design
It is highly recommended to use a true random number generator (TRNG) to ensure the security of encryption schemes. Hardware-based TRNGs generate unpredictable, unbiased, and independent random numbers because they employ physical phenomena, e.g., electrical noise, as sources to generate random numbers.
Phases : Implementation
It is highly recommended to use a true random number generator (TRNG) to ensure the security of encryption schemes. Hardware-based TRNGs generate unpredictable, unbiased, and independent random numbers because they employ physical phenomena, e.g., electrical noise, as sources to generate random numbers.

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-97 Cryptanalysis
Cryptanalysis is a process of finding weaknesses in cryptographic algorithms and using these weaknesses to decipher the ciphertext without knowing the secret key (instance deduction). Sometimes the weakness is not in the cryptographic algorithm itself, but rather in how it is applied that makes cryptanalysis successful. An attacker may have other goals as well, such as: Total Break (finding the secret key), Global Deduction (finding a functionally equivalent algorithm for encryption and decryption that does not require knowledge of the secret key), Information Deduction (gaining some information about plaintexts or ciphertexts that was not previously known) and Distinguishing Algorithm (the attacker has the ability to distinguish the output of the encryption (ciphertext) from a random permutation of bits).

Notas

As of CWE 4.5, terminology related to randomness, entropy, and predictability can vary widely. Within the developer and other communities, "randomness" is used heavily. However, within cryptography, "entropy" is distinct, typically implied as a measurement. There are no commonly-used definitions, even within standards documents and cryptography papers. Future versions of CWE will attempt to define these terms and, if necessary, distinguish between them in ways that are appropriate for different communities but do not reduce the usability of CWE for mapping, understanding, or other scenarios.

Referencias

REF-1370

rng_16.v
https://github.com/HACK-EVENT/hackatdac21/blob/main/piton/design/chip/tile/ariane/src/rand_num/rng_16.v#L12-L22

Envío

Nombre Organización Fecha Fecha de lanzamiento Version
Arun Kanuparthi, Hareesh Khattri, Parbati Kumar Manna, Narasimha Kumar V Mangipudi Intel Corporation 2020-02-10 +00:00 2020-02-24 +00:00 4.0

Modificaciones

Nombre Organización Fecha Comentario
CWE Content Team MITRE 2020-06-25 +00:00 updated Common_Consequences, Demonstrative_Examples, Modes_of_Introduction
CWE Content Team MITRE 2020-08-20 +00:00 updated Common_Consequences, Demonstrative_Examples, Description, Maintenance_Notes, Modes_of_Introduction, Potential_Mitigations, Related_Attack_Patterns, Research_Gaps
CWE Content Team MITRE 2021-03-15 +00:00 updated Maintenance_Notes, Research_Gaps
CWE Content Team MITRE 2021-07-20 +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
CWE Content Team MITRE 2023-10-26 +00:00 updated Demonstrative_Examples, Description, Observed_Examples, References
CWE Content Team MITRE 2025-04-03 +00:00 updated Demonstrative_Examples
CWE Content Team MITRE 2025-12-11 +00:00 updated Description, Potential_Mitigations, Relationships, 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.