HTTP Request Smuggling Affecting tornado package, versions [,6.3.3)


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team

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  • Snyk ID SNYK-PYTHON-TORNADO-5840803
  • published 15 Aug 2023
  • disclosed 14 Aug 2023
  • credit kenballus

Introduced: 14 Aug 2023

CVE NOT AVAILABLE CWE-444 Open this link in a new tab

How to fix?

Upgrade tornado to version 6.3.3 or higher.

Overview

tornado is a Python web framework and asynchronous networking library, originally developed at FriendFeed.

Affected versions of this package are vulnerable to HTTP Request Smuggling due to improper parsing of the -, +, and _ characters in chunk length and Content-Length fields through the int constructor.

Note: Exploiting this vulnerability is possible if Tornado is deployed behind certain proxies that interpret non-standard characters differently, such as older versions of haproxy.

CVSS Scores

version 3.1
Expand this section

Snyk

Recommended
5.6 medium
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    High
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    Low
  • Integrity (I)
    Low
  • Availability (A)
    Low