CVE-2022-24801

Publication date 4 April 2022

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

8.1 · High

Score breakdown

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.

Read the notes from the security team

Status

Package Ubuntu Release Status
twisted 24.10 oracular
Fixed 22.4.0-1
24.04 LTS noble
Fixed 22.4.0-1
23.10 mantic
Fixed 22.4.0-1
23.04 lunar
Fixed 22.4.0-1
22.10 kinetic
Fixed 22.4.0-1
22.04 LTS jammy
Fixed 22.1.0-2ubuntu2.3
21.10 impish Ignored end of life
20.04 LTS focal Ignored intrusive fix
18.04 LTS bionic Ignored intrusive fix
16.04 LTS xenial
Vulnerable
14.04 LTS trusty Ignored end of ESM support, was needed

Notes

rayveldkamp

For focal and earlier, patch requires backporting major changes to how HTTP packets are buffered and processed which is intrusive and could have high risk of regression.

Severity score breakdown

Parameter Value
Base score 8.1 · High
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H