CVE-2022-24801

HTTP Request Smuggling in twisted.web

Published Apr 4, 2022 CVSS 3.1 · 8.1 High EPSS 2.8% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-2991-1 twisted security update
EUVD EUVD EUVD-2022-0345 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.
Github GHSA Github GHSA GHSA-c2jg-hw38-jrqq Inconsistent Interpretation of HTTP Requests in twisted.web
Ubuntu USN Ubuntu USN USN-5576-1 Twisted vulnerability
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Twisted
Twisted twisted
CPEs cpe:2.3:a:twistedmatrix:twisted:*:*:*:*:*:*:*:* cpe:2.3:a:twisted:twisted:*:*:*:*:*:*:*:*
Vendors & Products Twistedmatrix
Twistedmatrix twisted
Twisted
Twisted twisted
Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Apr 23, 2025, 6:42 PM
Reserved
Feb 10, 2022, 12:00 AM
Status
Modified
Published
Apr 4, 2022, 6:15 PM
Modified
Jun 17, 2026, 4:32 AM
Severity
Important
Public date
Apr 4, 2022, 12:00 AM