COMMON WEAKNESS ENUMERATIONIncomplete

CWE-1296

Incorrect Chaining or Granularity of Debug Components

The product's debug components contain incorrect chaining or granularity of debug components.

Soyutlama

Base

Yapı

Simple

Sömürü İhtimali

Medium

Problemi anla

Problem nedir?

The product's debug components contain incorrect chaining or granularity of debug components.

Genişletilmiş açıklama

For debugging and troubleshooting a chip, several hardware design elements are often implemented, including: - Various Test Access Ports (TAPs) allow boundary scan commands to be executed. - For scanning the internal components of a chip, there are scan cells that allow the chip to be used as a "stimulus and response" mechanism. - Chipmakers might create custom methods to observe the internal components of their chips by placing various tracing hubs within their chip and creating hierarchical or interconnected structures among those hubs. Logic errors during design or synthesis could misconfigure the interconnection of the debug components, which could allow unintended access permissions.

Kök neden

Problem nasıl ve ne zaman oluşur?

Yaşam döngüsü evresi

Implementation

Risk

Başarılı sömürü neye yol açar?

Gain Privileges or Assume IdentityBypass Protection MechanismExecute Unauthorized Code or CommandsModify MemoryModify Files or Directories

Etkilenen güvenlik alanları: Confidentiality, Integrity, Access Control, Authentication, Authorization, Availability, Accountability

Depending on the access to debug component(s) erroneously granted, an attacker could use the debug component to gain additional understanding about the system to further an attack and/or execute other commands. This could compromise any security property, including the ones listed above.

Savunma

Nasıl önlenir ve çözülür?

Implementation

Uygulama aşaması savunması

Detay
Ensure that debug components are properly chained and their granularity is maintained at different authentication levels.

Doğrulama

Nasıl tespit edilir?

Architecture or Design Review

High
Appropriate Post-Si tests should be carried out at various authorization levels to ensure that debug components are properly chained and accessible only to users with appropriate credentials.

Dynamic Analysis with Manual Results Interpretation

High
Appropriate Post-Si tests should be carried out at various authorization levels to ensure that debug components are properly chained and accessible only to users with appropriate credentials.