// For flags

CVE-2020-8554

Kubernetes man in the middle using LoadBalancer or ExternalIPs

Severity Score

5.0
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

3
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

Kubernetes API server in all versions allow an attacker who is able to create a ClusterIP service and set the spec.externalIPs field, to intercept traffic to that IP address. Additionally, an attacker who is able to patch the status (which is considered a privileged operation and should not typically be granted to users) of a LoadBalancer service can set the status.loadBalancer.ingress.ip to similar effect.

El servidor de la API de Kubernetes en todas las versiones permite a un atacante que puede crear un servicio ClusterIP y establecer el campo spec.externalIPs, interceptar el tráfico a esa dirección IP. Adicionalmente, un atacante que sea capaz de parchear el estado (que se considera una operación privilegiada y no se debe típicamente otorgar a los usuarios) de un servicio LoadBalancer puede configurar el status.loadBalancer.ingress.ip con un efecto similar

A flaw was found in kubernetes. If a potential attacker can already create or edit services and pods, then they may be able to intercept traffic from other pods (or nodes) in the cluster.

*Credits: Etienne Champetier (@champtar) of Anevia
CVSS Scores
Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low
Attack Vector
Network
Attack Complexity
Medium
Authentication
Single
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2020-02-03 CVE Reserved
  • 2021-01-20 CVE Published
  • 2021-01-22 First Exploit
  • 2023-11-08 EPSS Updated
  • 2024-09-17 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
  • CWE-283: Unverified Ownership
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Kubernetes
Search vendor "Kubernetes"
 Kubernetes
Search vendor "Kubernetes" for product "Kubernetes"
*-
Affected
Oracle
Search vendor "Oracle"
 Communications Cloud Native Core Network Slice Selection Function
Search vendor "Oracle" for product "Communications Cloud Native Core Network Slice Selection Function"
 1.2.1
Search vendor "Oracle" for product "Communications Cloud Native Core Network Slice Selection Function" and version "1.2.1"
-
Affected
Oracle
Search vendor "Oracle"
 Communications Cloud Native Core Policy
Search vendor "Oracle" for product "Communications Cloud Native Core Policy"
 1.15.0
Search vendor "Oracle" for product "Communications Cloud Native Core Policy" and version "1.15.0"
-
Affected
Oracle
Search vendor "Oracle"
 Communications Cloud Native Core Service Communication Proxy
Search vendor "Oracle" for product "Communications Cloud Native Core Service Communication Proxy"
 1.14.0
Search vendor "Oracle" for product "Communications Cloud Native Core Service Communication Proxy" and version "1.14.0"
-
Affected