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CVE-2021-38598

Publication date 23 August 2021

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

9.1 · Critical

Score breakdown

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.

Read the notes from the security team

Status

Package Ubuntu Release Status
neutron 24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar
Not affected
22.10 kinetic
Not affected
22.04 LTS jammy
Not affected
21.10 impish
Not affected
21.04 hirsute Ignored
20.04 LTS focal
Fixed 2:16.4.2-0ubuntu6.2
18.04 LTS bionic
Fixed 2:12.1.1-0ubuntu8.1
16.04 LTS xenial
Needs evaluation
14.04 LTS trusty Not in release

Notes

mdeslaur

This issue was fixed in (2:16.4.1-0ubuntu2) in focal-updates and (2:18.1.0-0ubuntu2) in hirsute-updates, and was later released to -security.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
neutron

Severity score breakdown

Parameter Value
Base score 9.1 · Critical
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H