python3-tornado: Tornado is a Python web framework and asynchronous networking library

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

Where it's fixed