ALT-PU-2025-16776-1

Package update python3-module-tornado in branch sisyphus

Version6.5.0-alt1

Published2025-05-19

Max severityHIGH

Severity:

Closed issues (3)

HIGH7.5

Уязвимость компонента multipart/form-data веб-фреймворка и асинхронной сетевой библиотеки Tornado, позволяющая нарушителю вызвать отказ в обслуживании

Published: 2025-07-11Modified: 2026-03-04

CVSS 3.xHIGH 7.5

CVSS:3.x/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS 2.0HIGH 7.8

CVSS:2.0/AV:N/AC:L/Au:N/C:N/I:N/A:C

References

HIGH7.5

Tornado is a Python web framework and asynchronous networking library. When Tornado's ``multipart/form-data`` parser encounters certain errors, it logs a warning but continues trying to parse the remainder of the data. This allows remote attackers to generate an extremely high volume of logs, constituting a DoS attack. This DoS is compounded by the fact that the logging subsystem is synchronous. All versions of Tornado prior to 6.5.0 are affected. The vulnerable parser is enabled by default. Upgrade to Tornado version 6.50 to receive a patch. As a workaround, risk can be mitigated by blocking `Content-Type: multipart/form-data` in a proxy.

Published: 2025-05-15Modified: 2025-12-23

CVSS 3.xHIGH 7.5

CVSS:3.x/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

GHSA-7cx3-6m66-7c5m

HIGH7.5

Tornado vulnerable to excessive logging caused by malformed multipart form data

Published: 2025-05-16Modified: 2025-05-29

CVSS 3.xHIGH 7.5

CVSS:3.x/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References