CVE-2021-38598

23.08.2021, 05:15

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.

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	NIST	9.1 CRITICAL	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
mitre	CNA	---				---
CVE	ADP	---				---

Base Score

CVSS 3.x

EPSS Score

Percentile: 7%

Vendor	Product	Version
openstack	neutron	𝑥 < 16.4.1
openstack	neutron	17.0.0 ≤ 𝑥 < 17.1.3
openstack	neutron	18.0.0

𝑥

= Vulnerable software versions

Debian Releases

Debian Product

Codename

neutron

bullseye (security)	2:17.2.1-0+deb11u1 fixed
bullseye	2:17.2.1-0+deb11u1 fixed
buster	ignored
stretch	no-dsa
bookworm	2:21.0.0-7 fixed
sid	2:25.0.0-1 fixed
trixie	2:25.0.0-1 fixed

Ubuntu Releases

Ubuntu Product

Codename

neutron

noble	not-affected
mantic	not-affected
lunar	not-affected
kinetic	not-affected
jammy	not-affected
impish	not-affected
hirsute	ignored
focal	Fixed 2:16.4.2-0ubuntu6.2 released
bionic	Fixed 2:12.1.1-0ubuntu8.1 released
xenial	needs-triage
trusty	dne

Known Exploits!

Common Weakness Enumeration

CWE-290 - Authentication Bypass by Spoofing
This attack-focused weakness is caused by improperly implemented authentication schemes that are subject to spoofing attacks.

References

https://launchpad.net/bugs/1938670