IO SmashtheStack Level02 - iExploit Challenges

Xin

---[IO SmashtheStack Level02

First lets navigate to /levels and execute level02

&#46;/level02
Append the 39th through 42nd numbers in the sequence as a string and feed it to this binary via argv&#91;1&#93;&#46; 1, 2, 3, 5, 8, 13, 21&#46;&#46;&#46;
The 4th through the 7th numbers would give you 581321

This number sequence is a Fibonacci number where the number is the sum of the two previous numbers. Basically it wants us to find the values of number 40,41,42,43 in the sequence and put them together. I have written a little program to find these values.

Module Module1

    Sub Main()
        Dim no1 As Integer
        Dim no2 As Integer
        Dim temp As Integer
        no1 = 0
        no2 = 1

        For i = 1 To 43
            temp = no1 + no2
            If i = 40 Then
                Console&#46;WriteLine(temp)
            ElseIf i = 41 Then
                Console&#46;WriteLine(temp)
            ElseIf i = 42 Then
                Console&#46;WriteLine(temp)
            ElseIf i = 43 Then
                Console&#46;WriteLine(temp)
            End If
            no2 = no1
            no1 = temp
        Next
        Console&#46;ReadLine()

    End Sub

End Module

The output of this was

So lets execute the code and see what we get...

&#46;/level02 102334155165580141267914296433494437

We now get the following response

Win&#46;
sh-3&#46;2$

See you in /level03 ;)

Howdy, Stranger!

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