CVE-2024-52804

HIGH7.5EPSS 0.15%

Tornado has an HTTP cookie parsing DoS vulnerability

Published: 11/22/2024Modified: 2/4/2026

Also known as:GHSA-8w49-h785-mj3cCGA-p8m7-9p95-fm8m

Description

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. See also CVE-2024-7592 for a similar vulnerability in cpython.

Affected packages (2)

Debian/python-tornadofrom 0, < 6.1.0-1+deb11u1
PyPI/tornadofrom 0, < 6.4.2

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	HIGH7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References (6)

ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2024-52804
ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2024-52804
PATCHhttps://github.com/tornadoweb/tornado
WEBhttps://github.com/tornadoweb/tornado/commit/d5ba4a1695fbf7c6a3e54313262639b198291533
WEBhttps://github.com/tornadoweb/tornado/security/advisories/GHSA-8w49-h785-mj3c
WEBhttps://lists.debian.org/debian-lts-announce/2025/01/msg00000.html