HTTP Request Smuggling Affecting gunicorn package, versions [,19.10.0) [20.0.0,20.0.1)
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Test your applications- Snyk ID SNYK-PYTHON-GUNICORN-541164
- published 9 Jan 2020
- disclosed 15 Nov 2019
- credit Austin Jones
How to fix?
Upgrade gunicorn to version 19.10.0, 20.0.1 or higher.
Overview
gunicorn is a Python WSGI HTTP Server for UNIX
Affected versions of this package are vulnerable to HTTP Request Smuggling. It fails to properly process the Transfer-Encoding and Content-Length headers when both are present in a package request. This allows for conflicting information to be sent regarding the length of the package, which when processed by back-end servers under certain configurations would allow for malicious users to bypass security controls, gain unauthorized access to sensitive data, and directly compromise other application users.