#29800: Django hangs when Content-Length has incorrect value
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Reporter: Alexander Charykov | Owner:
| patriksletmo
Type: Bug | Status: assigned
Component: HTTP handling | Version: 2.1
Severity: Normal | Resolution:
Keywords: | Triage Stage: Accepted
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Comment (by Tim Graham):
The security team discussed this issue to confirm that we shouldn't treat
it as a security issue.
From Markus Holtermann:
The issue can also be reproduced with:
$ gunicorn foo.wsgi --access-logfile - --worker-connections 5
From Simon Charette:
I cannot reproduce when Django is behind a reverse proxy such as NGINX
with proxy_request_buffering on which is the default.
Given the development server should never be used in production and
gunicorn documentation strongly recommends to use it behind a proxy server
this doesn't sound severe to me. We should add a timeout on body read to
the development server but it's unlikely to be an attack vector if you
already follow best practice.
I mean, both Django's development server and gunicorn have been known to
be vulnerable to slow loris attacks and friends for a while at this point
at it feels to me that serving Django apps behind a reverse proxy is the
norm nowadays.
From Collin Anderson:
I this has come up before (or maybe it's a related issue):
https://groups.google.com/d/topic/django-developers/bYzHczKNoqM/discussion
From Claude Paroz:
Might be worth reaching to Graham Dumpleton about this issue. The WSGI
specs talk about a CONTENT_LENGTH shorter than the payload, but I'm not
sure it addresses the reverse issue.
--
Ticket URL: <https://code.djangoproject.com/ticket/29800#comment:5>
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