COMMON WEAKNESS ENUMERATIONDraft

CWE-1334

Unauthorized Error Injection Can Degrade Hardware Redundancy

An unauthorized agent can inject errors into a redundant block to deprive the system of redundancy or put the system in a degraded operating mode.

Soyutlama

Base

Yapı

Simple

Sömürü İhtimali

Medium

Problemi anla

Problem nedir?

An unauthorized agent can inject errors into a redundant block to deprive the system of redundancy or put the system in a degraded operating mode.

Genişletilmiş açıklama

To ensure the performance and functional reliability of certain components, hardware designers can implement hardware blocks for redundancy in the case that others fail. This redundant block can be prevented from performing as intended if the design allows unauthorized agents to inject errors into it. In this way, a path with injected errors may become unavailable to serve as a redundant channel. This may put the system into a degraded mode of operation which could be exploited by a subsequent attack.

Kök neden

Problem nasıl ve ne zaman oluşur?

Yaşam döngüsü evresi

Architecture and Design

Such issues could be introduced during hardware architecture and design and identified later during Testing or System Configuration phases.

Yaşam döngüsü evresi

Implementation

Such issues could be introduced during implementation and identified later during Testing or System Configuration phases.

Yaşam döngüsü evresi

Integration

Such issues could be introduced during integration and identified later during Testing or System Configuration phases.

Risk

Başarılı sömürü neye yol açar?

DoS: Crash, Exit, or RestartDoS: InstabilityQuality DegradationDoS: Resource Consumption (CPU)DoS: Resource Consumption (Memory)DoS: Resource Consumption (Other)Reduce PerformanceReduce ReliabilityUnexpected State

Etkilenen güvenlik alanları: Integrity, Availability

Savunma

Nasıl önlenir ve çözülür?

Architecture and Design

Mimari ve tasarım yaklaşımı

Detay
Ensure the design does not allow error injection in modes intended for normal run-time operation. Provide access controls on interfaces for injecting errors.

Implementation

Uygulama aşaması savunması

Detay
Disallow error injection in modes which are expected to be used for normal run-time operation. Provide access controls on interfaces for injecting errors.

Integration

Integration aşaması savunması

Detay
Add an access control layer atop any unprotected interfaces for injecting errors.