CVE-2021-25746

Ingress-nginx directive injection via annotations

Severity Score

7.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A security issue was discovered in ingress-nginx where a user that can create or update ingress objects can use .metadata.annotations in an Ingress object (in the networking.k8s.io or extensions API group) to obtain the credentials of the ingress-nginx controller. In the default configuration, that credential has access to all secrets in the cluster.

Se ha detectado un problema de seguridad en ingress-nginx en el que un usuario que puede crear o actualizar objetos ingress puede usar .metadata.annotations en un objeto Ingress (en el grupo networking.k8s.io o extensions API) para obtener las credenciales del controlador ingress-nginx. En la configuración por defecto, esa credencial presenta acceso a todos los secretos del clúster

*Credits: Anthony Weems, jeffrey&oliver

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

Low

Availability

Low

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

Partial

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-01-21 CVE Reserved
2022-05-06 CVE Published
2024-03-08 EPSS Updated
2024-09-17 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-20: Improper Input Validation

CAPEC

References (3)

URL	Tag	Source
https://github.com/kubernetes/ingress-nginx/issues/8503	Issue Tracking
https://groups.google.com/g/kubernetes-security-announce/c/hv2-SfdqcfQ	Issue Tracking
https://security.netapp.com/advisory/ntap-20220609-0006	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Kubernetes Search vendor "Kubernetes"		Ingress-nginx Search vendor "Kubernetes" for product "Ingress-nginx"				< 1.2.0 Search vendor "Kubernetes" for product "Ingress-nginx" and version " < 1.2.0"		-		Affected