# CVE-2022-24801: Inconsistent Interpretation of HTTP Requests in twisted.web

Source: https://junglewise.ai/threats/cve-2022-24801-inconsistent-interpretation-of-http-requests-in-twisted-web  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2022-04-04  
License: CC BY 4.0 with a link back

CVE-2022-24801 · Severity: low · CVSS 3.1 · Published 2022-04-04

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.

Technologies: [twisted (PyPI)](https://junglewise.ai/threats/technologies/pypi-twisted). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2022-24801 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2022-24801 being exploited in the wild.

**How severe is CVE-2022-24801?** Low severity, with a CVSS score of 3.1, published 4 April 2022.

**Which products and versions are affected?** twisted (PyPI) ECOSYSTEM:introduced=0,fixed=22.4.0, GIT:introduced=0,fixed=592217e951363d60e9cd99c5bbfd23d4615043ac|ECOSYSTEM:introduced=0,fixed=22.4.0.

**Is there a fix for CVE-2022-24801?** Yes. twisted (PyPI): upgrade to 22.4.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2022-24801?** Check whether you run twisted (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- twisted (PyPI): upgrade to 22.4.0 or later

  ```sh
  pip install "twisted>=22.4.0"
  ```


## Affected products

- twisted (PyPI) ECOSYSTEM:introduced=0,fixed=22.4.0, GIT:introduced=0,fixed=592217e951363d60e9cd99c5bbfd23d4615043ac|ECOSYSTEM:introduced=0,fixed=22.4.0

## Identifiers

- CVE-2022-24801
- GHSA-c2jg-hw38-jrqq
- PYSEC-2022-195

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