Tornado is a Python web framework and asynchronous networking library. The algorithm used for parsing HTTP cookies in Tornado versions prior to 6.4.2 sometimes has quadratic complexity, leading to excessive CPU consumption when parsing maliciously-crafted cookie headers. This parsing occurs in the event loop thread and may block the processing of other requests. Version 6.4.2 fixes the issue.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade pcsUpgrade python3-tornadoUpgrade pcs-snmp | Dec 4, 2024 | Nov 22, 2024 |
| Amazon Linux Ami 2 | — | Upgrade python3-tornadoUpgrade python3-tornado-debuginfoUpgrade python3-tornado-doc | Jan 10, 2025 | Nov 22, 2024 |
| Amazon_linux_2023 | — | Upgrade python-tornado-debugsourceUpgrade python3-tornado-debuginfoUpgrade python-tornado-docUpgrade python3-tornado | Feb 17, 2025 | Nov 22, 2024 |
| Debian | — | Upgrade python-tornado | Jan 3, 2025 | Nov 22, 2024 |
| Oracle_linux | — | Upgrade python3-tornadoUpgrade pcs-snmpUpgrade pcs | Dec 2, 2024 | Nov 22, 2024 |
| Redhat_linux | — | Upgrade python3-tornado-debuginfoUpgrade pcs-snmpUpgrade python3-tornadoUpgrade pcsNo solution existsUpgrade python-tornado-debugsource | Feb 10, 2025 | Nov 22, 2024 |
| Rocky_linux | — | Upgrade python3-tornado-debuginfoUpgrade pcsUpgrade python3-tornadoUpgrade pcs-snmp | May 8, 2025 | Nov 22, 2024 |
| Ubuntu | — | Upgrade python3-tornadoUpgrade python-tornado (Ubuntu Pro)Upgrade python3-tornado (Ubuntu Pro) | Dec 12, 2024 | Nov 22, 2024 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | Nov 22, 2024 |
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