| 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) | buster, buster (security) | 2:13.0.7+git.2021.09.27.bace3d1890-0+deb10u1 | vulnerable |
| bullseye (security), bullseye | 2:17.2.1-0+deb11u1 | fixed |
| bookworm | 2:21.0.0-7 | fixed |
| sid, trixie | 2:24.0.0-1 | 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/