qctf2018_stack2

信息收集

checksec

Arch:     i386-32-little
RELRO:    Partial RELRO
Stack:    Canary found
NX:       NX enabled
PIE:      No PIE (0x8048000)

执行

***********************************************************
*                      An easy calc                       *
*Give me your numbers and I will return to you an average *
*(0 <= x < 256)                                           *
***********************************************************
How many numbers you have:
1
Give me your numbers
2
1. show numbers
2. add number
3. change number
4. get average
5. exit

ida