CWE-638

Not Using Complete Mediation

High

Description

The product does not perform access checks on a resource every time the resource is accessed by an entity, which can create resultant weaknesses if that entity's rights or privileges change over time.

Potential Impact

How to Fix

Architecture and Design

Invalidate cached privileges, file handles or descriptors, or other access credentials whenever identities, processes, policies, roles, capabilities or permissions change. Perform complete authentication checks before accepting, caching and reusing data, dynamic content and code (scripts). Avoid caching access control decisions as much as possible.

Architecture and Design

Identify all possible code paths that might access sensitive resources. If possible, create and use a single interface that performs the access checks, and develop code standards that require use of this interface.

Related Weaknesses

References

View on MITRE CWE Database →

Need Help Fixing This Vulnerability?

Our security experts can help you identify and remediate CWE-638 vulnerabilities in your codebase.

Get Security Assessment