Memory corruption Course

You have learned the many ways to sanitize input in your app. It's time to turn your attention to mitigating another major application security risk: memory corruption.

46 minutes

Course description

Managing memory usage has long been a requirement for application development. Unfortunately, most developers don't do it very well. This can lead to leaks, overflows and crashes in your app. Hackers can exploit these vulnerabilities with denial-of-service and remote code execution attacks. In this course, you will learn how Android mobile app memory is structured and used. You will learn about the most common overflow types and the errors that cause them, and how to avoid them. You will explore what pointers are, the various types of pointers and when and how Android uses pointers. You will also exploit a notorious buffer overflow vulnerability in Stagefright, Android's media player.

Syllabus

Activity: Managing overflows

Video - 00:11:00
In this activity, we deliberately cause an overflow.
Understanding overflows, Part 2

Video - 00:10:00
In this lesson, we learn about managing recursive apps.
Understanding overflows

Video - 00:14:00
In this lesson, we learn about the different types of overflows that can happen in an app.
Android memory overview

Video - 00:12:00
In this lesson, we discuss Android memory, memory risks and Kotlin memory management.

Meet the author

Chrys Thorsen

Chrys Thorsen is a technology and education consultant with 25 years of experience. Her work has taken her around the U.S. and overseas, including as a contractor for the CDC using technology to help fight HIV/AIDS in Africa.

During her career, she has acquired 40 IT certifications, authored over 25 textbooks on a wide range of IT subjects, including secure iOS and Android coding, and created an equal number of IT-related video courses. When not working, Chrys enjoys reading scientific articles and experimenting with Internet-of-Things devices. She currently lives in Virginia with her sister, her cat and her dog which, as she describes it, "have the worst sibling rivalry imaginable."

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