CVE-2024-49769

Name	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.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1086468

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
waitress (PTS)	bullseye (security), bullseye	1.4.4-1.1+deb11u1	vulnerable
	bookworm	2.1.2-2	vulnerable
	trixie	3.0.0-1	vulnerable
	sid	3.0.1-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
waitress	source	(unstable)	3.0.1-1			1086468

Notes

https://github.com/Pylons/waitress/security/advisories/GHSA-3f84-rpwh-47g6
https://github.com/Pylons/waitress/issues/418
https://github.com/Pylons/waitress/pull/435
Fixed by: https://github.com/Pylons/waitress/commit/1ae4e894c9f76543bee06584001583fc6fa8c95c (v3.0.1)