Untitled

#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>

int main(void) {
        uid_t uid = geteuid();
        setuid(uid);
        system("clear");
        printf("Want to play a game? ");
        char buff[128];
        fgets(buff, 127, stdin);
        sleep(2);
        int length = strlen(buff);
        if(length == -10) {
                printf("Good job! Spawning shell...\n\n\n");
                execl("/bin/sh", "sh");
        } else {
                printf("Incorrect password!\nGoodbye!\n\n");
        }
        return 0;
}


Dump of assembler code for function main:
0x08048574 <main+0>:    lea    ecx,[esp+0x4]
0x08048578 <main+4>:    and    esp,0xfffffff0
0x0804857b <main+7>:    push   DWORD PTR [ecx-0x4]
0x0804857e <main+10>:   push   ebp
0x0804857f <main+11>:   mov    ebp,esp
0x08048581 <main+13>:   push   ecx
0x08048582 <main+14>:   sub    esp,0xa4
0x08048588 <main+20>:   call   0x80484a4 <geteuid@plt>
0x0804858d <main+25>:   mov    DWORD PTR [ebp-0xc],eax
0x08048590 <main+28>:   mov    eax,DWORD PTR [ebp-0xc]
0x08048593 <main+31>:   mov    DWORD PTR [esp],eax
0x08048596 <main+34>:   call   0x8048454 <setuid@plt>
0x0804859b <main+39>:   mov    DWORD PTR [esp],0x8048700
0x080485a2 <main+46>:   call   0x8048414 <system@plt>
0x080485a7 <main+51>:   mov    DWORD PTR [esp],0x8048706
0x080485ae <main+58>:   call   0x8048474 <printf@plt>
0x080485b3 <main+63>:   mov    eax,ds:0x8049890
0x080485b8 <main+68>:   mov    DWORD PTR [esp+0x8],eax
0x080485bc <main+72>:   mov    DWORD PTR [esp+0x4],0x7f
0x080485c4 <main+80>:   lea    eax,[ebp-0x8c]
0x080485ca <main+86>:   mov    DWORD PTR [esp],eax
0x080485cd <main+89>:   call   0x8048424 <fgets@plt>
0x080485d2 <main+94>:   mov    DWORD PTR [esp],0x2
0x080485d9 <main+101>:  call   0x8048484 <sleep@plt>
0x080485de <main+106>:  lea    eax,[ebp-0x8c]
0x080485e4 <main+112>:  mov    DWORD PTR [esp],eax
0x080485e7 <main+115>:  call   0x8048464 <strlen@plt>
0x080485ec <main+120>:  mov    DWORD PTR [ebp-0x8],eax
0x080485ef <main+123>:  cmp    DWORD PTR [ebp-0x8],0xfffffff6
0x080485f3 <main+127>:  jne    0x8048617 <main+163>
---Type <return> to continue, or q <return> to quit---
0x080485f5 <main+129>:  mov    DWORD PTR [esp],0x804871c
0x080485fc <main+136>:  call   0x8048494 <puts@plt>
0x08048601 <main+141>:  mov    DWORD PTR [esp+0x4],0x804873a
0x08048609 <main+149>:  mov    DWORD PTR [esp],0x804873d
0x08048610 <main+156>:  call   0x8048444 <execl@plt>
0x08048615 <main+161>:  jmp    0x8048623 <main+175>
0x08048617 <main+163>:  mov    DWORD PTR [esp],0x8048745
0x0804861e <main+170>:  call   0x8048494 <puts@plt>
0x08048623 <main+175>:  mov    eax,0x0
0x08048628 <main+180>:  add    esp,0xa4
0x0804862e <main+186>:  pop    ecx
0x0804862f <main+187>:  pop    ebp
0x08048630 <main+188>:  lea    esp,[ecx-0x4]
0x08048633 <main+191>:  ret