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Ascii_easy - Pwnable.kr

Posted on July 19, 2016

Writeups Pwnable.kr; Ret2libc; Buffer overflow; ASLR; Ascii armor;

As usual, we have a program: ascii_easy, which has the permissions to get the flag. After a fast reverse-engineering we can imagine that the source code from where it comes from should look more or less like this:

#define MEM 0x80000000

int is_ascii(char c){
    if (c <= 0x1f || c ...