CVE-2021-38598

Name	CVE-2021-38598
Description	OpenStack Neutron before 16.4.1, 17.x before 17.1.3, and 18.0.0 allows hardware address impersonation when the linuxbridge driver with ebtables-nft is used on a Netfilter-based platform. By sending carefully crafted packets, anyone in control of a server instance connected to the virtual switch can impersonate the hardware addresses of other systems on the network, resulting in denial of service or in some cases possibly interception of traffic intended for other destinations.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

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
	trixie	2:25.0.0-3	fixed
	sid	2:25.0.0-4	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
neutron	source	bullseye	2:17.2.1-0+deb11u1
neutron	source	(unstable)	2:18.1.0-2

Notes

[buster] - neutron <ignored> (Minor issue, not backported to rocky branch)
[stretch] - neutron <no-dsa> (Minor issue)
https://www.openwall.com/lists/oss-security/2021/08/17/4
https://launchpad.net/bugs/1938670
https://review.opendev.org/c/openstack/neutron/+/785917/