Backslash Vulnerability Database 
Not Using Complete Mediation
Not Using Complete Mediation
Not Using Complete Mediation
CWE-638
Short 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.
Best practices to prevent this CWE
Phase: 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.
Phase: 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.
