Safety vulnerability ID: 49024
The information on this page was manually curated by our Cybersecurity Intelligence Team.
Pheonix-waitress 1.4.2 includes a fix for CVE-2019-16789: In Waitress through version 1.4.0, if a proxy server is used in front of waitress, an invalid request may be sent by an attacker that bypasses the front-end and is parsed differently by waitress leading to a potential for HTTP request smuggling. Specially crafted requests containing special whitespace characters in the Transfer-Encoding header would get parsed by Waitress as being a chunked request, but a front-end server would use the Content-Length instead as the Transfer-Encoding header is considered invalid due to containing invalid characters. If a front-end server does HTTP pipelining to a backend Waitress server this could lead to HTTP request splitting which may lead to potential cache poisoning or unexpected information disclosure.
Latest version: 2.1.1.2
Pheonix fork of the Waitress WSGI server
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Security Fixes
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- Waitress did not properly validate that the HTTP headers it received were
properly formed, thereby potentially allowing a front-end server to treat a
request different from Waitress. This could lead to HTTP request
smuggling/splitting.
Please see the security advisory for more information:
https://github.com/Pylons/waitress/security/advisories/GHSA-m5ff-3wj3-8ph4
CVE-ID: CVE-2019-16789
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