HTTP Request Smuggling Affecting waitress package, versions [,1.4.0)
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Test your applications- Snyk ID SNYK-PYTHON-WAITRESS-538573
- published 22 Dec 2019
- disclosed 13 Dec 2019
- credit Unknown
Introduced: 13 Dec 2019
CVE-2019-16785 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. If a front-end server does not parse header fields with an LF the same way as it does those with a CRLF it can lead to the front-end and the back-end server parsing the same HTTP message in two different ways. This could lead to a potential for HTTP request smuggling/splitting whereby Waitress may see two requests while the front-end server only sees a single HTTP message.