Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') Affecting gevent package, versions [,23.9.0)
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Test your applications- Snyk ID SNYK-PYTHON-GEVENT-5906371
- published 20 Sep 2023
- disclosed 20 Sep 2023
- credit mukeran, Jianjun Chen
Introduced: 20 Sep 2023
CVE-2023-41419 Open this link in a new tabHow to fix?
Upgrade gevent to version 23.9.0 or higher.
Overview
Affected versions of this package are vulnerable to Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') when the gevent.pywsgi function is used. An attacker can craft invalid trailers in chunked requests on keep-alive connections that might appear as two requests to gevent.pywsgi. This could potentially bypass checks if an upstream server is filtering incoming requests based on paths or header fields and simply passing trailers through without validating them.
Note: If the upstream server validated that the trailers meet the HTTP specification, this could not occur, because characters that are required in an HTTP request, like a space, are not allowed in trailers.