Cyber Apocalypse 2024
Character
Solved by : Legend
Challenge description:
Security through Induced Boredom is a personal favourite approach of mine. Not as exciting as something like The Fray, but I love making it as tedious as possible to see my secrets, so you can only get one character at a time!
In this challenge the server is giving us the flag if we put the index value. For example if I put 0 then it will print the value H and so on. We need to do this till we get the complete flag till } character.
#! /usr/bin/python3
from pwn import *
SERVER_IP = "94.237.53.53"
SERVER_PORT = 47157
conn = remote(SERVER_IP, SERVER_PORT)
flag = ""
for index in range(111):
conn.sendline(str(index).encode('ascii'))
server_response = conn.recvline().decode().strip()
character = server_response.split()[-1]
flag += character
print(f"Index {index} : Character {character}", end="\r", flush=True)
if character == "}":
break
print(f"Flag: {flag}")
conn.close()
Flag: HTB{tH15_1s_4_r3aLly_l0nG_fL4g_i_h0p3_f0r_y0Ur_s4k3_tH4t_y0U_sCr1pTEd_tH1s_oR_els3_iT_t0oK_qU1t3_l0ng!!}