CVE-2022-24857 Multi factor authentication bypass in django-mfa3

What is CVE-2022-24857?

CVE-2022-24857 is a high-severity authentication bypass vulnerability in xi django-mfa3, published on 15 Apr 2022. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

django-mfa3 is a library that implements multi factor authentication for the django web framework. It achieves this by modifying the regular login view. Django however has a second login view for its admin area. This second login view was not modified, so the multi factor authentication can be bypassed. Users are affected if they have activated both django-mfa3 (< 0.5.0) and django.contrib.admin and have not taken any other measures to prevent users from accessing the admin login view. The issue has been fixed in django-mfa3 0.5.0. It is possible to work around the issue by overwriting the admin login route, e.g. by adding the following URL definition *before* the admin routes: url('admin/login/', lambda request: redirect(settings.LOGIN_URL)

Weakness: CWE-287

Which versions are affected by CVE-2022-24857?

3 open source packages ship an affected version, including django-mfa3. It affects 1 product.

Products include Django-Mfa3 Project Django-Mfa3.

How do I fix CVE-2022-24857?

Upgrade django-mfa3 to 0.5.0 or later.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2022-24857 being exploited?

There is no known exploitation of CVE-2022-24857 in the wild and no public exploit code.

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-3r7g-wrpr-j5g4, PYSEC-2022-192.