Hey everyone! Today we're going to talk about this vulnerability, and I'll explain it simply with examples:
Real-world example: Imagine you can only drink one bottle of water at a time. After that, you can't drink more. If you drink more than you can handle, you might get hurt, or even explode.
Programming example: You have a program that can handle a certain amount of data. If you give it more than that amount, the program will return more data and information that shouldn't be displayed.
Practical example: You have a website with an input box, and it asks you to enter, for example, a maximum of 5 characters. What will a hacker or attacker do? Simply put, they'll enter 50 characters. This will cause the program to fill up the first 5 characters, and the remaining extra characters will fill up other areas of memory. This will either cause the program to malfunction or give you information that shouldn't be displayed. And it's not limited to data; it can also involve executing instructions (command points). Prompt
Most Common Vulnerability Types:
1- Stack-based Overflow (Most Common)
2- Heap-based Overflow (More complex, but the vulnerability can still be exploited)
How to Protect Yourself from This Vulnerability:
1- You must be an experienced programmer, especially regarding functions, particularly in languages like C++ and C. Avoid using suspicious functions, for example. Modern languages like Python and others are relatively protected from this attack because they manage memory themselves.
2- Use protection techniques (stackcanaries, dep, aslr)
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