Exposure of Resource to Wrong Sphere

Draft Class
Structure: Simple
Description

This vulnerability occurs when an application unintentionally makes a resource accessible to users or systems that should not have permission to use it.

Extended Description

This flaw typically happens in two ways. First, a resource like a file or directory is given insecure permissions, allowing unauthorized users to read, modify, or delete it. Second, an application might fail to properly validate a user's request, allowing them to access resources outside their intended scope—like navigating to another user's private data or system files. In both scenarios, the core failure is a broken boundary. The application does not correctly enforce the separation between different trust zones, or 'control spheres.' This exposes sensitive data, configuration files, or system resources to the wrong audience, leading directly to data breaches, information leaks, or system compromise.

Common Consequences 3
Scope: Confidentiality

Impact: Read Application Data

An adversary that gains access to a resource exposed to a wrong sphere could potentially retrieve private data from that resource, thus breaking the intended confidentiality of that data.

Scope: Integrity

Impact: Modify Application Data

An adversary that gains access to a resource exposed to a wrong sphere could potentially modify data held within that resource, thus breaking the intended integrity of that data and causing the system relying on that resource to make unintended decisions.

Scope: Other

Impact: Varies by Context

The consequences may vary widely depending on how the product uses the affected resource.

References 1
Supplemental Details - 2022 CWE Top 25
MITRE
28-06-2022
ID: REF-1287
Modes of Introduction
Architecture and Design
Implementation
Operation
Notes
TheoreticalA "control sphere" is a set of resources and behaviors that are accessible to a single actor, or a group of actors. A product's security model will typically define multiple spheres, possibly implicitly. For example, a server might define one sphere for "administrators" who can create new user accounts with subdirectories under /home/server/, and a second sphere might cover the set of users who can create or delete files within their own subdirectories. A third sphere might be "users who are authenticated to the operating system on which the product is installed." Each sphere has different sets of actors and allowable behaviors.