CVE-2019-16789

HIGH Year: 2019
CVSS v3 Score
8.2
High
CVSS v2 Score
6.4
Medium
Weakness Type
CWE-444
View all →

Vulnerability 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.

Related Vulnerabilities

CVE-2021-41732

HIGH
CVSS:8.2(High)

An issue was discovered in zeek version 4.1.0. There is a HTTP request splitting vulnerability that will invalidate any ZEEK HTTP based security analysis. NOTE: the vendor's position is that the obser...

CWE-4442021

CVE-2017-8894

HIGH
CVSS:8.1(High)

AeroAdmin 4.1 uses an insecure protocol (HTTP) to perform software updates. An attacker can hijack an update via man-in-the-middle in order to execute code in the machine.

CWE-4442017

CVE-2021-21299

HIGH
CVSS:8.1(High)

hyper is an open-source HTTP library for Rust (crates.io). In hyper from version 0.12.0 and before versions 0.13.10 and 0.14.3 there is a vulnerability that can enable a request smuggling attack. The ...

CWE-4442021

CVE-2021-29991

HIGH
CVSS:8.1(High)

Firefox incorrectly accepted a newline in a HTTP/3 header, interpretting it as two separate headers. This allowed for a header splitting attack against servers using HTTP/3. This vulnerability affects...

CWE-4442021

CVE-2022-24801

HIGH
CVSS:8.1(High)

Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to version 22.4.0rc1, the Twisted Web HTTP 1.1 server, located in the `twisted.web.http` module, parsed sev...

CWE-4442022

CVE-2024-41671

HIGH
CVSS:8.3(High)

Twisted is an event-based framework for internet applications, supporting Python 3.6+. The HTTP 1.0 and 1.1 server provided by twisted.web could process pipelined HTTP requests out-of-order, possibly ...

CWE-4442024