Amazon Linux 2023 Security Advisory: ALAS2023-2025-1002
Advisory Released Date: 2025-06-10
Advisory Updated Date: 2025-06-10
Severity:
Medium
Issue Overview:
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. (CVE-2025-47287)
Affected Packages:
python-tornado
Issue Correction:
Run dnf update python-tornado --releasever 2023.7.20250609 to update your system.
New Packages:
aarch64:
python-tornado-debugsource-6.1.0-2.amzn2023.0.5.aarch64
python3-tornado-debuginfo-6.1.0-2.amzn2023.0.5.aarch64
python-tornado-doc-6.1.0-2.amzn2023.0.5.aarch64
python3-tornado-6.1.0-2.amzn2023.0.5.aarch64
src:
python-tornado-6.1.0-2.amzn2023.0.5.src
x86_64:
python-tornado-debugsource-6.1.0-2.amzn2023.0.5.x86_64
python3-tornado-debuginfo-6.1.0-2.amzn2023.0.5.x86_64
python-tornado-doc-6.1.0-2.amzn2023.0.5.x86_64
python3-tornado-6.1.0-2.amzn2023.0.5.x86_64