Allocation of Resources Without Limits or Throttling Affecting python-tornado-doc package, versions <0:6.1.0-2.amzn2023.0.5


Severity

Recommended
medium

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.11% (31st percentile)

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  • Snyk IDSNYK-AMZN2023-PYTHONTORNADODOC-10339739
  • published11 Jun 2025
  • disclosed15 May 2025

Introduced: 15 May 2025

CVE-2025-47287  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 python-tornado-doc to version 0:6.1.0-2.amzn2023.0.5 or higher.
This issue was patched in ALAS2023-2025-1002.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python-tornado-doc package and not the python-tornado-doc package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1