CVE-2019-12781 Django Incorrect HTTP detection with reverse-proxy connecting via HTTPS

What is CVE-2019-12781?

CVE-2019-12781 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 1 Jul 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An issue was discovered in Django 1.11 before 1.11.22, 2.1 before 2.1.10, and 2.2 before 2.2.3. An HTTP request is not redirected to HTTPS when the SECURE_PROXY_SSL_HEADER and SECURE_SSL_REDIRECT settings are used, and the proxy connects to Django via HTTPS. In other words, django.http.HttpRequest.scheme has incorrect behavior when a client uses HTTP.

Weakness: CWE-319

Which versions are affected by CVE-2019-12781?

7 open source packages ship an affected version, including django and Django. It affects 3 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Djangoproject Django.

How do I fix CVE-2019-12781?

Upgrade django to a fixed version for your release line: 1.11.22, 2.1.10 or 2.2.3.

Is CVE-2019-12781 being exploited?

There is no known exploitation of CVE-2019-12781 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

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

Also known as ALPINE-CVE-2019-12781, DEBIAN-CVE-2019-12781, DLA-1842-1, GHSA-6c7v-2f49-8h26, PYSEC-2019-10, SUSE-SU-2019:2379-1 and 1 more.