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Code Issues 32 Releases Wiki Activity

Fixed CVE-2019-12781 -- Made HttpRequest always trust SECURE_PROXY_SSL_HEADER if set.

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An HTTP request would not be redirected to HTTPS when the
SECURE_PROXY_SSL_HEADER and SECURE_SSL_REDIRECT settings were used if
the proxy connected to Django via HTTPS.

HttpRequest.scheme will now always trust the SECURE_PROXY_SSL_HEADER if
set, rather than falling back to the request scheme when the
SECURE_PROXY_SSL_HEADER did not have the secure value.

Thanks to Gavin Wahl for the report and initial patch suggestion, and
Shai Berger for review.
This commit is contained in:
Carlton Gibson
2019-06-13 10:57:29 +02:00
committed by Mariusz Felisiak
parent 30b3ee9d0b
commit 54d0f5e62f
6 changed files with 85 additions and 9 deletions
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20
docs/releases/1.11.22.txt
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@@ -5,3 +5,23 @@ Django 1.11.22 release notes
*July 1, 2019*
Django 1.11.22 fixes a security issue in 1.11.21.
CVE-2019-12781: Incorrect HTTP detection with reverse-proxy connecting via HTTPS
--------------------------------------------------------------------------------
When deployed behind a reverse-proxy connecting to Django via HTTPS,
:attr:`django.http.HttpRequest.scheme` would incorrectly detect client
requests made via HTTP as using HTTPS. This entails incorrect results for
:meth:`~django.http.HttpRequest.is_secure`, and
:meth:`~django.http.HttpRequest.build_absolute_uri`, and that HTTP
requests would not be redirected to HTTPS in accordance with
:setting:`SECURE_SSL_REDIRECT`.
``HttpRequest.scheme`` now respects :setting:`SECURE_PROXY_SSL_HEADER`, if it
is configured, and the appropriate header is set on the request, for both HTTP
and HTTPS requests.
If you deploy Django behind a reverse-proxy that forwards HTTP requests, and
that connects to Django via HTTPS, be sure to verify that your application
correctly handles code paths relying on ``scheme``, ``is_secure()``,
``build_absolute_uri()``, and ``SECURE_SSL_REDIRECT``.