COMMON WEAKNESS ENUMERATIONDraft

CWE-370

Missing Check for Certificate Revocation after Initial Check

The product does not check the revocation status of a certificate after its initial revocation check, which can cause the product to perform privileged actions even after the certificate is revoked at a later time.

Soyutlama

Variant

Yapı

Simple

Sömürü İhtimali

Medium

Problemi anla

Problem nedir?

The product does not check the revocation status of a certificate after its initial revocation check, which can cause the product to perform privileged actions even after the certificate is revoked at a later time.

Genişletilmiş açıklama

If the revocation status of a certificate is not checked before each action that requires privileges, the system may be subject to a race condition. If a certificate is revoked after the initial check, all subsequent actions taken with the owner of the revoked certificate will lose all benefits guaranteed by the certificate. In fact, it is almost certain that the use of a revoked certificate indicates malicious activity.

Kök neden

Problem nasıl ve ne zaman oluşur?

Yaşam döngüsü evresi

Implementation

Risk

Başarılı sömürü neye yol açar?

Gain Privileges or Assume Identity

Etkilenen güvenlik alanları: Access Control

Trust may be assigned to an entity who is not who it claims to be.
Modify Application Data

Etkilenen güvenlik alanları: Integrity

Data from an untrusted (and possibly malicious) source may be integrated.
Read Application Data

Etkilenen güvenlik alanları: Confidentiality

Data may be disclosed to an entity impersonating a trusted entity, resulting in information disclosure.

Savunma

Nasıl önlenir ve çözülür?

Architecture and Design

Mimari ve tasarım yaklaşımı

Detay
Ensure that certificates are checked for revoked status before each use of a protected resource. If the certificate is checked before each access of a protected resource, the delay subject to a possible race condition becomes almost negligible and significantly reduces the risk associated with this issue.