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Integer Overflows and Underflows

This course introduces integer overflow and underflow vulnerabilities, their exploitation and possible mitigations.

7 videos  //  54 minutes of training

Course description

Integer overflow and underflow vulnerabilities are caused by misuse of the various types of variables available in most programming languages. Understanding how to identify these vulnerabilities and how they can be exploited can prevent an attacker from bypassing checks or triggering other vulnerabilities (like buffer overflows).

Course syllabus

Introduction to Integer Overflows and UnderflowsDuration: 1:50

This video provides an introduction to the integer overflows and underflows course.

Introduction to VariablesDuration: 9:13

This video covers the fundamentals of variables.

Integer Overflows and UnderflowsDuration: 15:25

This video describes how integer overflow and underflow vulnerabilities can make an application vulnerable to attack.

Overflow and Underflow ExploitationDuration: 7:26

This video describes how integer overflow and underflow vulnerabilities can be exploited by an attacker.

Overflows and Underflows Case StudyDuration: 5:46

This video describes a case study of an application containing an integer overflow vulnerability.

Integer Overflow and Underflow MitigationsDuration: 7:18

This video describes mitigations for integer overflow and underflow vulnerabilities.

Integer Overflow DemoDuration: 6:44

This video demonstrates exploitation of integer overflow vulnerabilities.

Meet the author

Howard Poston


Howard Poston is a cybersecurity researcher with a background in blockchain, cryptography and malware analysis. He has a master's degree in Cyber Operations from the Air Force Institute of Technology and two years of experience in cybersecurity research and development at Sandia National Labs. He currently works as a freelance consultant providing training and content creation for cyber and blockchain security. He can be reached by email at or via his website at

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Plans and pricing





$599 / license

Annually. Includes all content plus team admin and reporting.