Question

Describe what a buffer overflow attack is, especially the main purpose of the attack. During program execution, an input function is called to get a user's interactive input to the program. Describe what will happen to the return address kept in memory during the function call and the consequences if the user is an attacker performing a buffer overflow attack.

Answer 1

The buffer is a memory storage area used to temporarily save data when it is transferred from one location to another. When the amount of data exceeds the storage capacity of the memory buffer, a buffer overflow (or buffer overflow) will occur. As a result, programs that attempt to write data into the buffer will overwrite adjacent memory locations. Buffer overflow will affect all types of software. They are usually caused by incorrect input format or failure to allocate enough space for the buffer. If the transaction covers the executable code, it may cause the program to behave abnormally, and generate incorrect results, memory access errors or crashes.

The buffer is a memory storage area used to temporarily save data when it is transferred from one location to another. When the amount of data exceeds the storage capacity of the memory buffer, a buffer overflow (or buffer overflow) will occur. As a result, programs that attempt to write data into the buffer will overwrite adjacent memory locations. Buffer overflow will affect all types of software. They are usually caused by incorrect input format or failure to allocate enough space for the buffer. If the transaction covers the executable code, it may cause the program to behave abnormally, and generate incorrect results, memory access errors or crashes.