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.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has a package installed that is affected by a vulnerability as referenced in the SUSE-SU-2025:01649-2 advisory.

    - CVE-2025-47287: excessive logging when parsing malformed `multipart/form-data` can lead to a denial-of-     service       (bsc#1243268).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The detected version of the Tornado Python package, Tornado, is prior to 6.4.2.
It is therefore affected by a DoS vulnerability that happens 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.:

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has a package installed that is affected by a vulnerability as referenced in the SUSE-SU-2025:01649-1 advisory.

    - CVE-2025-47287: excessive logging when parsing malformed `multipart/form-data` can lead to a denial-of-     service       (bsc#1243268).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
237218	SUSE SLED15 / SLES15 Security Update : python-tornado6 (SUSE-SU-2025:01649-2)	Nessus	SuSE Local Security Checks	high
237199	Python Library Tornado 6.5.0 DoS	Nessus	Misc.	high
237167	SUSE SLED15 / SLES15 / openSUSE 15 Security Update : python-tornado6 (SUSE-SU-2025:01649-1)	Nessus	SuSE Local Security Checks	high

Detections

Analytics

CVE-2025-47287

high

Tenable Plugins

high

high

high