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CVE-2021-40085

Published: 31 August 2021

An issue was discovered in OpenStack Neutron before 16.4.1, 17.x before 17.2.1, and 18.x before 18.1.1. Authenticated attackers can reconfigure dnsmasq via a crafted extra_dhcp_opts value.

Notes

AuthorNote
mdeslaur
This issue was fixed in (2:16.4.1-0ubuntu2) in focal-updates and
(2:18.1.1-0ubuntu2) in hirsute-updates, and was later released
to -security.

Priority

Medium

Cvss 3 Severity Score

6.5

Score breakdown

Status

Package Release Status
neutron
Launchpad, Ubuntu, Debian
bionic
Released (2:12.1.1-0ubuntu8.1)
focal
Released (2:16.4.2-0ubuntu6.2)
hirsute Ignored
(reached end-of-life)
impish Not vulnerable
(2:18.1.1+git2021091315.0fa97ecceb-0ubuntu1)
jammy Not vulnerable
(2:18.1.1+git2021091315.0fa97ecceb-0ubuntu1)
kinetic Not vulnerable
(2:18.1.1+git2021091315.0fa97ecceb-0ubuntu1)
lunar Not vulnerable
(2:18.1.1+git2021091315.0fa97ecceb-0ubuntu1)
trusty Does not exist

upstream
Released (16.4.1, 17.2.1, 18.1.1)
xenial Needs triage

Patches:
upstream: https://opendev.org/openstack/neutron/commit/110fed07cb83deb3abd85073cb351066713b6384 (queens)

Severity score breakdown

Parameter Value
Base score 6.5
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact High
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N