CVE-2024-52804

Name of the Vulnerable Software and Affected Versions Tornado versions prior to 6.4.2

Description The algorithm used for parsing HTTP cookies in Tornado 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, potentially allowing a remote attacker to cause a denial of service.

Recommendations For versions prior to 6.4.2, update to version 6.4.2 to fix the issue. As a temporary workaround, consider restricting the size of HTTP cookie headers to minimize the risk of exploitation.