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CWE-654

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CWE-654

Reliance on a Single Factor in a Security Decision

Base
Draft

Description

A protection mechanism relies exclusively, or to a large extent, on the evaluation of a single condition or the integrity of a single object or entity in order to make a decision about granting access to restricted resources or functionality.

Common Consequences

Scope

Access Control

Impact

Gain Privileges or Assume Identity

Scope

Non-Repudiation

Impact

Hide Activities

Potential Mitigations

Architecture and Design

Use multiple simultaneous checks before granting access to critical operations or granting critical privileges. A weaker but helpful mitigation is to use several successive checks (multiple layers of security).

Architecture and Design

Use redundant access rules on different choke points (e.g., firewalls).

CVE-2022-35248

Chat application skips validation when Central Authentication Service (CAS) is enabled, effectively removing the second factor from two-factor authentication

Applicable Platforms

Not Language-Specific

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