USN-7547-1: Tornado vulnerability

Publication date

2 June 2025

Overview

Tornado could be made to consume excessive resources when processing specially crafted HTTP requests.


Packages

Details

It was discovered that Tornado inefficiently handled requests when
parsing certain form data. An attacker could possibly use this issue to
increase resource utilization leading to a denial of service. This issue
was only addressed in Ubuntu 24.04 LTS and Ubuntu 22.04 LTS.
(CVE-2025-47287)

It was discovered that Tornado inefficiently handled requests when
parsing certain form data. An attacker could possibly use this issue to
increase resource utilization leading to a denial of service. This issue
was only addressed in Ubuntu 24.04 LTS and Ubuntu 22.04 LTS.
(CVE-2025-47287)

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
25.04 plucky python3-tornado –  6.4.2-1ubuntu0.25.04.1
24.10 oracular python3-tornado –  6.4.1-2ubuntu0.2
24.04 noble python3-tornado –  6.4.0-1ubuntu0.2
22.04 jammy python3-tornado –  6.1.0-3ubuntu0.1~esm2  

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