CVE-2022-24801 Information

Description

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 several HTTP request constructs more leniently than permitted by RFC 7230. This non-conformant parsing can lead to desync if requests pass through multiple HTTP parsers potentially resulting in HTTP request smuggling. Users who may be affected use Twisted Web’s HTTP 1.1 server and/or proxy and also pass requests through a different HTTP server and/or proxy. The Twisted Web client is not affected. The HTTP 2.0 server uses a different parser so it is not affected. The issue has been addressed in Twisted 22.4.0rc1. Two workarounds are available: Ensure any vulnerabilities in upstream proxies have been addressed such as by upgrading them; or filter malformed requests by other means such as configuration of an upstream proxy.

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

https://github.com/twisted/twisted/commit/592217e951363d60e9cd99c5bbfd23d4615043ac https://github.com/twisted/twisted/releases/tag/twisted-22.4.0rc1 https://github.com/twisted/twisted/security/advisories/GHSA-c2jg-hw38-jrqq https://lists.debian.org/debian-lts-announce/2022/05/msg00003.html

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.1