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CVE-2021-40797

Published: 8 September 2021

An issue was discovered in the routes middleware in OpenStack Neutron before 16.4.1, 17.x before 17.2.1, and 18.x before 18.1.1. By making API requests involving nonexistent controllers, an authenticated user may cause the API worker to consume increasing amounts of memory, resulting in API performance degradation or denial of service.

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
impish Not vulnerable
(2:18.1.1+git2021091315.0fa97ecceb-0ubuntu1)
trusty Does not exist

xenial Needs triage

upstream
Released (16.4.1, 17.2.1, 18.1.1)
hirsute Ignored
(end of life)
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)
bionic
Released (2:12.1.1-0ubuntu8.1)
focal
Released (2:16.4.2-0ubuntu6.2)
mantic Not vulnerable
(2:18.1.1+git2021091315.0fa97ecceb-0ubuntu1)
Patches:
upstream: https://opendev.org/openstack/neutron/commit/dfbb9bcb5dae282c575b33171d691a5fca946beb (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 None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H