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CVE-2024-52804

Published: Nov 22, 2024

Modified: Nov 3, 2025

PUBLISHED

CVSS v3.1

7.5

HIGH

Description

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.

Vendor	Product	Versions
tornadoweb	tornado	affected `< 6.4.2`

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

References

https://github.com/tornadoweb/tornado/security/advisories/GHSA-8w49-h785-mj3c

x_refsource_CONFIRM

https://github.com/tornadoweb/tornado/commit/d5ba4a1695fbf7c6a3e54313262639b198291533

x_refsource_MISC

https://github.com/advisories/GHSA-7pwv-g7hj-39pr

x_refsource_MISC

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