Course

Interacting with the World

This course describes many ways a program can interact with the world.

    Syllabus

  • Introduction Video — 00:02:32
    • Let’s take a look at what is included in this course.

  • Network Address Validation Video — 00:08:04
    • In this video, you’ll look at how to validate network addresses and limit where the network request come from.

  • File Name Validation Video — 00:28:46
    • How can a hacker use filename to make a program access file other than the permitted ones? How can a program protect itself against that?

  • Files Video — 00:37:56
    • Which function families can we use to manipulate files, and how do we use them safely?

  • Command Line Arguments Video — 00:16:42
    • How long can command-line arguments be, and how do we validate them?

  • Loading Shared Objects or Launching Executables Video — 00:13:37
    • Take a look at how loading shared objects or executables can cause security issues, and how to prevent these issues.

  • Sockets Video — 00:14:20
    • This video explores how to safely use datagram and stream sockets.

  • stdin / stdout / stderr Video — 00:03:01
    • Explore stdin/stdout/stderr and how to safely use these special streams.

  • Environment Variables Video — 00:10:24
    • How can a hacker use the environment variable to execute malicious code with higher privileges?

Syllabus

Course description

In this course, you’ll explore the many different ways a program can interact with the world. This includes files, file name validation and stdin/stdout/stderr. For each topic, the security aspects of the interaction are discussed and recommendations are made about how to validate exchanged data.

Meet the author

Martin Dubois obtained a degree in computer engineering from Laval University, Québec City, in 1993. He worked in many high-tech start-ups as software developer and software development leader. He mainly developed in C and C++, creating embedded software and device drivers for Windows and Linux. In 2000, he became a freelancer. He helps clients to develop safe, functional and efficient software systems. In addition to developing in C and C++, he provides expert corporate training about device driver development and other related subjects.

Martin is deeply interested in computer security. He never misses the Québec City Hackfest event and even presented subjects twice. He is also a part-time lecturer at colleges and universities, where he teaches computer science, programming and network security.

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We use Infosec Skills to provide continuous training to our technicians and to prepare them for various certifications. Infosec Skills allows us to create personalized training programs that focus on each of our technicians’ particular roles and see their progress as they take courses. We also, recommend it to clients to make their IT support teams better.

Caleb Yankus

DS

This has been utilized to bridge the skills gap across our cyber team and to aid them as they prepare for their various certifications. It also has provided a nice learning foundation for our various cyber team members to utilize as we continue to find ways for cross-utilization with operations while minimizing the downtime needed to ensure everyone’s knowledge is the same.

Daniel Simpson

IS

We use Infosec Skills to provide base level knowledge for employees. We also use the services to provide in depth learning for employees as they encounter new technologies. If an employee is is assigned to a new project, we can rely on Infosec Skills to provide a rapid concentrated learning environment. This rapid concentrated learning positions our employees for success.

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