
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Gadgets that pop values from the stack into a register are especially useful, as the
value to be loaded in the register can be put on the stack as part of the exploit, providing control
over what gets loaded into the register. Suppose there is a gadget popq %rdi; ret at address
0x0000555555555473. Your goal is to place the value 0xfeedface00000000 in register %rdi and
then transfer control to a function called foo, which is at address 0x000055555557960e. The return
address from the vulnerable function (i.e., the function whose buffer you will overflow with your
exploit) starts exactly 48 bytes from the start of the buffer where your exploit goes. Give your
exploit string in the form of input to hex2raw. (Hint: The information you need is all here; you
just have to figure out in what order things should be in the exploit string. It will probably help to
draw a picture.)
Expert Solution

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Step 1: Outline of the given question
The question asks for the construction of an exploit string in Python. The goal of this exploit is to load a specific value into the `%rdi` register and redirect program control to a designated function address. It provides details about the relevant addresses and the required order of elements in the exploit string.
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