POC-Django JSONField/HStoreField SQL Injection Vulnerability Exploit (CVE-2019-14234)

Django released a security update on August 1, 2019, which fixes a SQL injection vulnerability in the two model fields of JSONField and HStoreField.

Reference link:

https://www.djangoproject.com/weblog/2019/aug/01/security-releases/ https://www.leavesongs.com/PENETRATION/django-jsonfield-cve-2019-14234.html

The vulnerability requires the developer to use JSONField/HStoreField; moreover, the field name of the queryset can be controlled. Django's built-in application Django-Admin is affected, which gives us an easy way to reproduce the vulnerability.

Start Vulnerability Application

Compile and start a vulnerable Django 2.2.3 by executing the following command:

docker compose build
docker compose up -d

After the environment is started, you can see the home page of Django at http://your-ip:8000.

Vulnerability Reproduce

First, log in to the Django-Admin http://your-ip:8000/admin/ with username admin and password a123123123.

Then go to the list-view http://your-ip:8000/admin/vuln/collection/ of the model Collection:

Add detail__a'b=123 to the GET parameter, where detail is the JSONField:

http://your-ip:8000/admin/vuln/collection/?detail__a%27b=123

You can see that the single quote has been injected successfully, and the SQL statement reports an error: