CVE-2021-40797

openstack-neutron: Routes middleware memory leak for nonexistent controllers

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Se ha detectado un problema en el middleware de rutas en OpenStack Neutron versiones anteriores a 16.4.1, 17.x versiones anteriores a 17.2.1 y 18.x versiones anteriores a 18.1.1. Al llevar a cabo peticiones a la API que implican a controladores no existentes, un usuario autenticado puede causar que el trabajador de la API consuma cantidades crecientes de memoria, resultando en una degradación del rendimiento de la API o una denegación de servicio

A resource-allocation flaw was found in openstack-neutron. An authenticated attacker could make API requests involving nonexistent controllers causing the API worker to consume increasing amounts of memory. This flaw could be exploited to force API performance degradation or denial of service.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-09-08 CVE Reserved
2021-09-08 CVE Published
2024-08-04 CVE Updated
2024-08-04 First Exploit
2024-08-27 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-770: Allocation of Resources Without Limits or Throttling
CWE-772: Missing Release of Resource after Effective Lifetime

CAPEC

References (5)

URL	Tag	Source

URL	Date	SRC
https://launchpad.net/bugs/1942179	2024-08-04

URL	Date	SRC
http://www.openwall.com/lists/oss-security/2021/09/09/2	2021-09-15
https://security.openstack.org/ossa/OSSA-2021-006.html	2021-09-15

URL	Date	SRC
https://access.redhat.com/security/cve/CVE-2021-40797	2022-03-23
https://bugzilla.redhat.com/show_bug.cgi?id=2003248	2022-03-23

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Openstack Search vendor "Openstack"		Neutron Search vendor "Openstack" for product "Neutron"				< 16.4.1 Search vendor "Openstack" for product "Neutron" and version " < 16.4.1"		-		Affected
Openstack Search vendor "Openstack"		Neutron Search vendor "Openstack" for product "Neutron"				>= 17.0.0 < 17.2.1 Search vendor "Openstack" for product "Neutron" and version " >= 17.0.0 < 17.2.1"		-		Affected
Openstack Search vendor "Openstack"		Neutron Search vendor "Openstack" for product "Neutron"				>= 18.0.0 < 18.1.1 Search vendor "Openstack" for product "Neutron" and version " >= 18.0.0 < 18.1.1"		-		Affected