CVE-2022-31015

Name	CVE-2022-31015
Description	Waitress is a Web Server Gateway Interface server for Python 2 and 3. Waitress versions 2.1.0 and 2.1.1 may terminate early due to a thread closing a socket while the main thread is about to call select(). This will lead to the main thread raising an exception that is not handled and then causing the entire application to be killed. This issue has been fixed in Waitress 2.1.2 by no longer allowing the WSGI thread to close the socket. Instead, that is always delegated to the main thread. There is no work-around for this issue. However, users using waitress behind a reverse proxy server are less likely to have issues if the reverse proxy always reads the full response.
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	1012315

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
waitress (PTS)	bullseye	1.4.4-1.1+deb11u1	fixed
	bullseye (security)	1.4.4-1.1+deb11u2	fixed
	bookworm	2.1.2-2	fixed
	sid, trixie	3.0.1-1	fixed

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

Package	Type	Release	Fixed Version	Debian Bugs
waitress	source	stretch	(not affected)
waitress	source	buster	(not affected)
waitress	source	bullseye	(not affected)
waitress	source	(unstable)	2.1.2-1	1012315

Notes

[bullseye] - waitress <not-affected> (Only affects 2.1.x)
[buster] - waitress <not-affected> (Only affects 2.1.x)
[stretch] - waitress <not-affected> (Vulnerable code not present)
https://github.com/Pylons/waitress/security/advisories/GHSA-f5x9-8jwc-25rw
https://github.com/Pylons/waitress/commit/4f6789b035610e0552738cdc4b35ca809a592d48 (v2.1.2)
https://github.com/Pylons/waitress/issues/374
https://github.com/Pylons/waitress/pull/377