Gray-Box Security Testing via Code Instrumentation Observer
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Solution Overview
Problem
Traditional black-box security testing for Web applications is limited in revealing all vulnerabilities, as it lacks insight into the internal workings of the application under test, leading to incomplete vulnerability identification and repetitive remediation efforts.
Innovation Solution
Gray-box security testing is introduced, where an observer monitors the internal operations of the Web application, providing the scanner with insight into the application's behavior, allowing for more comprehensive vulnerability detection and reporting through a communication channel already used by the application, minimizing additional configuration and interference with normal operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If black-box security testing is used, then the testing process is simple and straightforward, but the scanner cannot identify all vulnerabilities and lacks insight into internal workings
Solution Approach 1:
The patent introduces a code instrumentation mechanism as an intermediary between the black-box scanner and the application under test. This instrumentation layer monitors internal operations, data flows, and control flows without requiring changes to the scanner's external interface, thereby maintaining ease of operation while significantly improving vulnerability detection accuracy through internal visibility.
Solution Approach 2:
The patent transitions from a single-dimensional black-box approach to a multi-dimensional testing framework by adding internal code execution monitoring as a new dimension. This allows the system to simultaneously observe external HTTP requests/responses and internal application behavior, enabling comprehensive vulnerability identification that combines both external attack simulation and internal state tracking.
2Area of stationary object
If black-box scanning explores all URLs, then the attack surface is covered, but the scanner cannot provide information about vulnerability locations inside the code
Solution Approach 1:
The code instrumentation acts as an intermediary that captures and reports internal application state information back to the scanner. This instrumentation layer instruments critical code paths, data sinks, and validation logic to provide precise location information about vulnerabilities, enabling the scanner to report not just that a vulnerability exists but exactly where in the code it is located.
3Measurement precision
If the scanner reports all discovered vulnerabilities, then comprehensive coverage is achieved, but duplicate vulnerabilities cause repetitive remediation work
Solution Approach 1:
The patent implements a feedback mechanism where the code instrumentation continuously monitors application state and provides real-time information to the scanner. This feedback loop enables the system to identify and consolidate duplicate vulnerability reports by correlating multiple findings with the same root cause, allowing remediation teams to address underlying issues once rather than repeatedly fixing the same problem in different locations.
4Measurement precision
If gray-box testing with observer is implemented, then vulnerability detection accuracy improves, but additional configuration and communication channels are required
Solution Approach 1:
The patent implements a multi-functional communication channel that serves both normal application operations and security testing purposes. The instrumentation framework uses existing application communication infrastructure (such as logging systems or monitoring APIs) to transmit vulnerability data, eliminating the need for separate dedicated communication channels and reducing overall system complexity despite the enhanced testing capabilities.
Data Source
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AI summary
The present disclosure provides a system that includes a server hosting an application under test (AUT), an observer configured to monitor instructions executed by the AUT, and a computing device communicatively coupled to the AUT and the observer through a common communication channel. The computing device may be configured to send an application request to the AUT, wherein the application request is configured to expose a potential vulnerability of the AUT. The computing device may receive an application response from the AUT in accordance with the AUT's programming. The computing device may send a service request to the observer, and receive a service response from the observer that contains information corresponding to the instructions executed by the AUT due to the application request, information about the AUT, or information about a server hosting the AUT.