CVE-2022-24801

HIGH

Published Apr 4, 20224y ago · Modified Jun 17, 20262w ago

8.1 CVSS 3.1

High

Published Apr 4, 2022 4y ago

Last Modified Jun 17, 2026 2w ago

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 Details

Base Score

8.1

Exploitability

2.2

Impact

5.9

Vector string

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

Attack Vector Network

Attack Complexity High

Privileges Required None

User Interaction None

Scope Unchanged

Confidentiality High

Integrity High

Availability High

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status

No Known Exploit

Patch Available

Weaknesses 1

CWE-444

Affected Products 5

Vendor	Product	Version	Range
twisted	twisted	*	<22.4.0
debian	debian_linux	9.0	any
fedoraproject	fedora	35	any
fedoraproject	fedora	36	any
oracle	zfs_storage_appliance_kit	8.8	any

References 7

github.com https://github.com/twisted/twisted/commit/592217e951363d60e9cd99c5bbfd23d4615043ac

PatchThird Party Advisory
github.com https://github.com/twisted/twisted/releases/tag/twisted-22.4.0rc1

Release NotesThird Party Advisory
github.com https://github.com/twisted/twisted/security/advisories/GHSA-c2jg-hw38-jrqq

Third Party Advisory
lists.debian.org https://lists.debian.org/debian-lts-announce/2022/05/msg00003.html

Mailing ListThird Party Advisory
lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7U6KYDTOLPICAVSR34G2WRYLFBD2YW5K/
lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GLKHA6WREIVAMBQD7KKWYHPHGGNKMAG6/
oracle.com https://www.oracle.com/security-alerts/cpujul2022.html

PatchThird Party Advisory

Remediation

github.com https://github.com/twisted/twisted/commit/592217e951363d60e9cd99c5bbfd23d4615043ac

PatchThird Party Advisory
oracle.com https://www.oracle.com/security-alerts/cpujul2022.html

PatchThird Party Advisory