Stack Based Buffer Overflow Practical For Windows (Vulnserver)

Vulnserver Buffer Overflow attack with TRUN command

Buffers are memory storage regions that temporarily hold data while it is transferred from one location to another. A buffer overflow occurs when the volume of data exceeds the storage capacity of the memory buffer. As a result, the program attempting to write the data to the buffer overwrites adjacent memory locations.

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It is a critical vulnerability that lets someone access your important memory locations. A hacker can insert his malicious script and gain access to the machine. Here is a picture that shows where a stack is located, which will be the place of exploitation. Heap is like a free-floating region of memory.

Image Source: Google

Now let us try understanding the stack hierarchy. Stack hierarchy has extended stack pointer (ESP), Buffer space, extended base pointer (EBP), and extended instruction…