Comments for BabyPhD CTF Team

Comment on hackyou.ctf.su 2016 by justcallmedude

justcallmedude — Thu, 27 Jul 2017 13:39:55 +0000

nice, I'll try KLEE next time 😀

Comment on hackyou.ctf.su 2016 by zun

zun — Mon, 26 Dec 2016 07:42:40 +0000

in [Reverse 100] problem, other simple way is to use Klee to solve

#include
#include
#include

#define ITERS 12
int main() {
char buf[ITERS];
klee_make_symbolic(buf, ITERS, "012345");
unsigned int a = buf[0] | (buf[4] << 8) | (buf[8] << 16);
unsigned int b = buf[1] | (buf[5] << 8) | (buf[9] << 16);
unsigned int c = buf[2] | (buf[6] << 8) | (buf[10] << 16);
unsigned int d = buf[3] | (buf[7] << 8) | (buf[11] << 16);
if (!(((a % 3571) == 2963) && (((a % 2843) == 215)) && (((a % 30243) == 13059))))
return 2;
if (!(((b % 80735) == 51964) && (((b % 8681) == 2552)) && (((b % 40624) == 30931))))
return 3;
if (!(((c % 99892) == 92228) && (((c % 45629) == 1080)) && (((c % 24497) == 12651))))
return 4;
if (!(((d % 54750) == 26981) && (((d % 99627) == 79040)) && (((d % 84339) == 77510))))
return 5;
// printf("Congratulations %s is flag\n",buf);
klee_assert(0);
return 0;
}

Comment on Writeup for beginners - BoF Vulnerability Lab (Syracuse University) by Tony

Tony — Fri, 25 Nov 2016 01:43:02 +0000

In the first example, if you don't put the NOPs before the shellcode (for instance if you write the shellcode and then the NOPs) the exploit does not work. Can you explain why are the NOPs required in that place?

Comment on Whitehat Contest 12 - Pwn400 by john

john — Fri, 07 Oct 2016 04:02:00 +0000

alert('>"<') Awesome bug @_@

Comment on Whitehat Contest 12 - Pwn400 by chuymichxinhdep

chuymichxinhdep — Mon, 12 Sep 2016 03:45:24 +0000

Shame on youu :shame:

Comment on [Whitehat GrandPrix 2015] Writeup by sn

sn — Sun, 15 Nov 2015 11:38:47 +0000

How to solve crypto-100?

Comment on [Whitehat GrandPrix 2015] Writeup by chuymichxinhdep

chuymichxinhdep — Fri, 30 Oct 2015 12:47:14 +0000

Oh thiệt là ghê

Comment on CSAW 2015 CTF All Exploitable Solutions (Script only) by Tuấn

Tuấn — Sun, 04 Oct 2015 07:35:14 +0000

http://dctf.def.camp/ giúp đỡ xíu đc ko ad @@

Comment on BackdoorCTF Writeup by Khoa

Khoa — Mon, 06 Apr 2015 09:05:07 +0000

Trong câu MISC của backdoor CTF 2015: QR. Cho mình hỏi nhiệm vụ của 2 đoạn code này. Cảm ơn 🙂
1 - string = string+line[1:len(line)-1]+"0"*(47-len(line))+"\n"
2 - file.write(string[46:len(string)-1-46])

Comment on [Whitehat Contest 8] Pwn200,Pwn500 Writeup by justcallmedude

justcallmedude — Mon, 02 Feb 2015 15:17:25 +0000

so funny, bro =)))