HIGH 7.5 PyPI
Tornado has an HTTP cookie parsing DoS vulnerability
GHSA-8w49-h785-mj3c · CVE-2024-52804 · PYSEC-2026-1975
Published · Modified
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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.
References
- WEB https://github.com/tornadoweb/tornado/security/advisories/GHSA-8w49-h785-mj3c
- ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2024-52804
- WEB https://github.com/tornadoweb/tornado/commit/d5ba4a1695fbf7c6a3e54313262639b198291533
- PACKAGE https://github.com/tornadoweb/tornado
- WEB https://lists.debian.org/debian-lts-announce/2025/01/msg00000.html
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