CVE-2022-21679

Authorization Policy bypass in Istio

Severity Score

9.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Istio is an open platform to connect, manage, and secure microservices. In Istio 1.12.0 and 1.12.1 The authorization policy with hosts and notHosts might be accidentally bypassed for ALLOW action or rejected unexpectedly for DENY action during the upgrade from 1.11 to 1.12.0/1.12.1. Istio 1.12 supports the hosts and notHosts fields in authorization policy with a new Envoy API shipped with the 1.12 data plane. A bug in the 1.12.0 and 1.12.1 incorrectly uses the new Envoy API with the 1.11 data plane. This will cause the hosts and notHosts fields to be always matched regardless of the actual value of the host header when mixing 1.12.0/1.12.1 control plane and 1.11 data plane. Users are advised to upgrade or to not mix the 1.12.0/1.12.1 control plane with 1.11 data plane if using hosts or notHosts field in authorization policy.

Istio es una plataforma abierta para conectar, administrar y asegurar microservicios. En Istio versiones 1.12.0 y 1.12.1 la política de autorización con hosts y notHosts podría ser accidentalmente omitida para la acción ALLOW o rechazada inesperadamente para la acción DENY durante la actualización de 1.11 a 1.12.0/1.12.1. Istio 1.12 soporta los campos hosts y notHosts en la política de autorización con una nueva API Envoy enviada con el plano de datos 1.12. Un error en las versiones 1.12.0 y 1.12.1 usa incorrectamente la nueva API de Envoy con el plano de datos 1.11. Esto causará que los campos hosts y notHosts siempre coincidan independientemente del valor real del encabezado del host cuando sean mezclados el plano de control 1.12.0/1.12.1 y el plano de datos 1.11. Se aconseja a usuarios actualizar o no mezclar el plano de control 1.12.0/1.12.1 con el plano de datos 1.11 si son usados los campos hosts o notHosts en la política de autorización

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-11-16 CVE Reserved
2022-01-19 CVE Published
2023-08-12 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-670: Always-Incorrect Control Flow Implementation

CAPEC

References (2)

URL	Tag	Source
https://github.com/istio/istio/security/advisories/GHSA-rwfr-xrvw-2rvv	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://istio.io/latest/news/releases/1.12.x/announcing-1.12.2	2022-01-27

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Istio Search vendor "Istio"		Istio Search vendor "Istio" for product "Istio"				1.12.0 Search vendor "Istio" for product "Istio" and version "1.12.0"		-		Affected
Istio Search vendor "Istio"		Istio Search vendor "Istio" for product "Istio"				1.12.0 Search vendor "Istio" for product "Istio" and version "1.12.0"		alpha0		Affected
Istio Search vendor "Istio"		Istio Search vendor "Istio" for product "Istio"				1.12.0 Search vendor "Istio" for product "Istio" and version "1.12.0"		alpha1		Affected
Istio Search vendor "Istio"		Istio Search vendor "Istio" for product "Istio"				1.12.0 Search vendor "Istio" for product "Istio" and version "1.12.0"		alpha5		Affected
Istio Search vendor "Istio"		Istio Search vendor "Istio" for product "Istio"				1.12.0 Search vendor "Istio" for product "Istio" and version "1.12.0"		beta0		Affected
Istio Search vendor "Istio"		Istio Search vendor "Istio" for product "Istio"				1.12.0 Search vendor "Istio" for product "Istio" and version "1.12.0"		beta1		Affected
Istio Search vendor "Istio"		Istio Search vendor "Istio" for product "Istio"				1.12.0 Search vendor "Istio" for product "Istio" and version "1.12.0"		beta2		Affected
Istio Search vendor "Istio"		Istio Search vendor "Istio" for product "Istio"				1.12.0 Search vendor "Istio" for product "Istio" and version "1.12.0"		rc1		Affected
Istio Search vendor "Istio"		Istio Search vendor "Istio" for product "Istio"				1.12.1 Search vendor "Istio" for product "Istio" and version "1.12.1"		-		Affected