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Checking for Application Vulnerabilities Using Fault Injection (Mechanical Project)

This study introduces a fault injector, called “Pulad”, specifically developed for finding application vulnerabilities. Most previous approaches for finding application vulnerabilities involved static verification methods. With these methods, the source code is not executed.

Since vulnerabilities can only be revealed when they are exploited, the use of a dynamic verification method, executing the source code, seems needed. The main two dynamic verification areas are software testing and fault injection. This study focuses on fault injection. Pulad, the fault injector described in this thesis consists of two main parts called the “collector” and the “fault injector”.

The goal of the collector is to record all the environment-application interactions when the application is running. These interactions focusing on the environment files are then analyzed and the following fields are uploaded into a database including the file name, file extension, file size, file directory, number of times the file was used, file permission (includes symbolic link and ownership) and number of times an error occurred.

The fault injector allows to inject faults either using a graphical user interface (GUI) or directly through a text file. The faults in the files include the file name, the directory name, the execution path, the library path, the file existence, the file ownership, the file permission, etc. For each of the faults, the specific type of fault needs to be indicated. Moreover, the interaction points where the faults should be injected are also provided by the user.
Source: University of Maryland
Author: Djam, Melody

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