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Ubuntu Security Notice USN-7547-1
June 02, 2025
python-tornado vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 25.04
- Ubuntu 24.10
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
Summary:
Tornado could be made to consume excessive resources when processing
specially crafted HTTP requests.
Software Description:
- python-tornado: scalable, non-blocking web server and tools
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)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 25.04
python3-tornado 6.4.2-1ubuntu0.25.04.1
Ubuntu 24.10
python3-tornado 6.4.1-2ubuntu0.2
Ubuntu 24.04 LTS
python3-tornado 6.4.0-1ubuntu0.2
Ubuntu 22.04 LTS
python3-tornado 6.1.0-3ubuntu0.1~esm2
Available with Ubuntu Pro
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-7547-1
CVE-2025-47287
Package Information:
https://launchpad.net/ubuntu/+source/python-tornado/6.4.2-1ubuntu0.25.04.1
https://launchpad.net/ubuntu/+source/python-tornado/6.4.1-2ubuntu0.2
https://launchpad.net/ubuntu/+source/python-tornado/6.4.0-1ubuntu0.2
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