CVE-2021-40797

Name	CVE-2021-40797
Description	An issue was discovered in the routes middleware in OpenStack Neutron before 16.4.1, 17.x before 17.2.1, and 18.x before 18.1.1. By making API requests involving nonexistent controllers, an authenticated user may cause the API worker to consume increasing amounts of memory, resulting in API performance degradation or denial of service.
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	994202

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
neutron (PTS)	bullseye (security), bullseye	2:17.2.1-0+deb11u1	fixed
	bookworm	2:21.0.0-7	fixed
	sid, trixie	2:25.0.0-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Debian Bugs
neutron	source	buster	2:13.0.7+git.2021.09.27.bace3d1890-0+deb10u1
neutron	source	bullseye	2:17.2.1-0+deb11u1
neutron	source	(unstable)	2:19.0.0-1	unimportant	994202

Notes

https://launchpad.net/bugs/1942179
neutron-api in Debian is served over UWSGI, cf. https://bugs.debian.org/994202
and so serves the requests and stops the process.