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High severityNVD Advisory· Published Oct 29, 2024· Updated Nov 17, 2024

Waitress has a denial of service leading to high CPU usage/resource exhaustion

CVE-2024-49769

Description

Waitress is a Web Server Gateway Interface server for Python 2 and 3. When a remote client closes the connection before waitress has had the opportunity to call getpeername() waitress won't correctly clean up the connection leading to the main thread attempting to write to a socket that no longer exists, but not removing it from the list of sockets to attempt to process. This leads to a busy-loop calling the write function. A remote attacker could run waitress out of available sockets with very little resources required. Waitress 3.0.1 contains fixes that remove the race condition.

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
waitressPyPI
< 3.0.13.0.1

Affected products

29

Patches

Vulnerability mechanics

References

8

News mentions

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