Level14
After accessing level14 account, check the hint as follows.
When the 0xdeadbeef enter a variable called check, The program is executed level15 shell..I create file that equal to attackme using hint, and analyze it.
I know the size of stack is 0x38 ( 56byte ).
and I know that the program compare 0xdeadbeef with value of ebb-16.
When the 0xdeadbeef enters the ebp-16, level15 shell is executed.
So I put the dummy value to its front, and put a “\xef\xbe\xad\xde”.
As a result, I know the password of level15.
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