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CVE-2019-16789

Status Candidate

Overview

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. This issue is fixed in Waitress 1.4.1 through more strict HTTP field validation.

Related Files

Red Hat Security Advisory 2021-0420-01
Posted Feb 4, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-0420-01 - Quay 3.4.0 release. Issues addressed include HTTP request smuggling, buffer overflow, information leakage, integer overflow, out of bounds read, and out of bounds write vulnerabilities.

tags | advisory, web, overflow, vulnerability
systems | linux, redhat
advisories | CVE-2019-16785, CVE-2019-16786, CVE-2019-16789, CVE-2019-19911, CVE-2019-20477, CVE-2019-3866, CVE-2020-10177, CVE-2020-10378, CVE-2020-10379, CVE-2020-10994, CVE-2020-11538, CVE-2020-14040, CVE-2020-5310, CVE-2020-5311, CVE-2020-5312, CVE-2020-5313, CVE-2020-8131
SHA-256 | fc1c021d43cf16f4b5a7a35f8b5247813c911163c4070cc206c22b06869fb2c6
Red Hat Security Advisory 2020-0720-01
Posted Mar 5, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-0720-01 - Waitress is a pure Python WSGI server which supports HTTP/1.0 and HTTP/1.1. HTTP request smuggling was addressed.

tags | advisory, web, python
systems | linux, redhat
advisories | CVE-2019-16785, CVE-2019-16786, CVE-2019-16789
SHA-256 | 073ff936845e6edb0602084d9e603169e0a3bf734795afc24cfafdd36ab033e2
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