Supply Chain Attack - Kubernetes

Description

Kubernetes dependencies are not pinned to an exact digest, making the docker build unable the verify the integrity of the image and allowing a malicious actor to override the used components with malicious components without leaving a trace.

Impact

Override dependencies or component with malicious content.

Recommendation

Use mechanisms such as git-commits, or artifacts and hashes to verify the data integrity.

Threat

Anonymous attacker from Internet with write access to the provider releases.

Expected Remediation Time

⌚ minutes.

Score

Default score using CVSS 3.1. It may change depending on the context of the src.

Base

• Attack vector: N
• Attack complexity: H
• Privileges required: N
• User interaction: R
• Scope: U
• Confidentiality: N
• Integrity: L
• Availability: N

Temporal

• Exploit code madurity: U
• Remediation level: O
• Report confidence: R

Result

• Vector string: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N/E:U/RL:O/RC:R
• Score:
  • Base: 3.1
  • Temporal: 2.6
• Severity:
  • Base: Low
  • Temporal: Low

Compliant code

All docker dependencies are pinned using secure mechanisms

apiVersion: v1
kind: Pod
metadata:
  name: <Pod name>
spec:
  containers:
  - name: <container name>
    image: ubuntu@sha256:45b23dee08af5e43a7fea6c4cf9c25ccf269ee113168c19722f87876677c5cb2

Non compliant code

There are docker dependencies not pinned

apiVersion: v1
kind: Pod
metadata:
  name: <Pod name>
spec:
  containers:
  - name: <container name>
    image: ubuntu

Requirements

• 266.Disable insecure functionalities

Fixes

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