CVEvulnerability

CVE-2019-16789

8.2 HIGH Published 2019-12-26 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2019-12-26
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.1 HIGH — CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:H/A:N
CVSS 3.1 ([email protected])
8.2 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
CVSS 2.0 ([email protected])
6.4 MEDIUM — AV:N/AC:L/Au:N/C:P/I:P/A:N
Weaknesses
CWE-444

Description

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.

Affected configurations

• agendaless waitress (<= 1.4.0) • oracle communications cloud native core network function cloud native environment 1.10.0 • debian debian linux 9.0 • fedoraproject fedora 30 • fedoraproject fedora 31 • redhat openstack 15

Related

Weakness · CWE (1)

  • CWE-444 Inconsistent Interpretation of HTTP Requests weakness

References