HTTP Request Smuggling Affecting waitress package, versions [,1.4.0)
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Test your applications- Snyk ID SNYK-PYTHON-WAITRESS-543054
- published 22 Jan 2020
- disclosed 22 Jan 2020
- credit Unknown
Introduced: 22 Jan 2020
CVE-2019-16792 Open this link in a new tabHow to fix?
Upgrade waitress to version 1.4.0 or higher.
Overview
waitress is a production-quality pure-Python WSGI server with very acceptable performance.
Affected versions of this package are vulnerable to HTTP Request Smuggling. It is possible to conduct request smuggling by sending the Content-Length header twice. Waitress would header fold a double Content-Length header and due to being unable to cast the now comma separated value to an integer would set the Content-Length to 0 internally. If two Content-Length headers are sent in a single request, Waitress would treat the request as having no body, thereby treating the body of the request as a new request in HTTP pipelining. This issue is fixed in Waitress