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Ubuntu Security Notice USN-7150-1
December 11, 2024

python-tornado vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 24.10
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in Tornado.

Software Description:
- python-tornado: scalable, non-blocking web server and tools

Details:

It was discovered that Tornado incorrectly handled a certain redirect.
A remote attacker could possibly use this issue to redirect a user to an
arbitrary web site and conduct a phishing attack by having the user access
a specially crafted URL. This issue was only addressed in Ubuntu 22.04 LTS,
Ubuntu 20.04 LTS, and Ubuntu 18.04 LTS. Ubuntu 16.04 LTS was previously
addressed in USN-6159-1. (CVE-2023-28370)

It was discovered that Tornado inefficiently handled requests when parsing
cookies. An attacker could possibly use this issue to increase resource
utilization leading to a denial of service. (CVE-2024-52804)

Update instructions:

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

Ubuntu 24.10
  python3-tornado                 6.4.1-2ubuntu0.1

Ubuntu 24.04 LTS
  python3-tornado                 6.4.0-1ubuntu0.1

Ubuntu 22.04 LTS
  python3-tornado                 6.1.0-3ubuntu0.1~esm1
                                  Available with Ubuntu Pro

Ubuntu 20.04 LTS
  python3-tornado                 6.0.3+really5.1.1-3ubuntu0.1~esm1
                                  Available with Ubuntu Pro

Ubuntu 18.04 LTS
  python-tornado                  4.5.3-1ubuntu0.2+esm1
                                  Available with Ubuntu Pro
  python3-tornado                 4.5.3-1ubuntu0.2+esm1
                                  Available with Ubuntu Pro

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

References:
  https://ubuntu.com/security/notices/USN-7150-1
  CVE-2023-28370, CVE-2024-52804

Package Information:
https://launchpad.net/ubuntu/+source/python-tornado/6.4.1-2ubuntu0.1
https://launchpad.net/ubuntu/+source/python-tornado/6.4.0-1ubuntu0.1