Integer Overflow

What is Integer Overflow?

Integer Overflow occurs when an arithmetic operation attempts to create a numeric value that is outside the range that can be represented with a given number of bits. This can lead to unexpected behavior, such as buffer overflows, crashes, or security vulnerabilities.

How Integer Overflow Works

Integer Overflow typically involves the following steps:

• Vulnerability Identification: The attacker identifies an integer overflow vulnerability in the target system.
• Exploitation: The attacker provides input that causes an integer overflow, leading to unexpected behavior or memory corruption.
• Outcome: The attacker achieves their goal, such as executing arbitrary code or crashing the system.

Interactive Integer Overflow Example

Below is a simulation of an Integer Overflow attack. Click the button to see how an attacker exploits an integer overflow vulnerability.

Integer Overflow Tools and Resources

Here are some tools and resources to help you understand and defend against Integer Overflow:

How to Defend Against Integer Overflow

To protect your systems from Integer Overflow, follow these best practices:

• Use Safe Libraries: Use libraries that handle integer operations safely, such as those that check for overflow.
• Validate Input: Always validate and sanitize input to prevent integer overflows.
• Enable Compiler Warnings: Use compiler warnings to detect potential integer overflows.
• Conduct Code Reviews: Review code for potential integer overflow vulnerabilities and address them promptly.