Proxy Resource Access Mechanism for Privileged Context Validation
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Solution Overview
Problem
Current computer systems often grant excessive privilege rights to users to allow legitimate processes to function, leading to security vulnerabilities as user processes can accidentally or maliciously access critical resources, compromising device security.
Innovation Solution
A proxy resource access mechanism is implemented, where a proxy hook module intercepts system calls from user processes and generates proxy resource access requests, which are validated by a proxy service module operating in a privileged security context, obtaining resource handles to permit or deny access based on predefined policies, thereby controlling access to resources more finely and securely.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional privilege rights are granted to user processes to enable legitimate operations, then the ability of processes to access required resources is improved, but security of the computer device deteriorates due to increased risk of accidental or malicious access to critical resources
Solution Approach 1:
A proxy service module is introduced as an intermediary between user processes and resources requiring elevated privileges. The proxy hook module embedded in user processes intercepts system calls and forwards them to the proxy service module, which executes privileged operations on behalf of unprivileged processes. This mediator architecture enables processes to access required resources through controlled delegation while maintaining security boundaries.
Solution Approach 2:
The system segments privilege management into distinct components: user processes operating with minimal privileges, a proxy hook module for intercepting requests, a proxy service module for executing privileged operations, and a security unit for validation. This segmentation allows fine-grained control where only the proxy service module holds elevated privileges, isolating the security risk from ordinary user processes.
2Object-affected harmful factors
If minimal privilege rights are assigned to user processes to maintain security, then security of the computer device is improved, but the ability of processes to perform required operations deteriorates due to insufficient access rights
Solution Approach 1:
The proxy service module acts as an intermediary that bridges the gap between minimal user privileges and required resource access. User processes send requests through the proxy hook module, which forwards them to the proxy service module executing with elevated privileges. This intermediary mechanism preserves security by keeping user processes unprivileged while enabling operational capability through delegated privileged execution.
Solution Approach 2:
The proxy service module operates autonomously to handle privileged operations on behalf of user processes. It independently validates requests against security policies, obtains necessary resource handles from the security unit, and executes operations without requiring user processes to have elevated privileges. This self-service approach maintains security boundaries while enabling required operations.
Data Source
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AI summary
A computer device (200) and method are described for controlling access to a resource (115). An execution environment (203) executes a user process (120) with access privileges according to a user security context (121). A security unit (250) controls access to resources (115, 125) according to the user security context (121a), with the user process (120) making system calls (501 ) to the security unit (250). A proxy hook module (310) embedded within the user process (120) intercepts the system call (501 ) and generates a proxy resource access request (502). A proxy service module (320) in a privileged security context (111 ) validates the proxy resource access request (502) from the proxy hook module (310) and, if validated, obtains and returns a resource handle that permits access to the desired resource (115) by the user process (120).