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Traceability Loss - Kubernetes

Description​

The kubernetes configuration does not set a logging property, which prevents log files from being created. These files are useful for identifying and tracking malicious actions or anomalous behavior. Alternatively, log files do not have sufficient level of detail.

Impact​

Perform harmful actions without raising an alert.

Recommendation​

Enable auditing on the Kubernetes API Server and set the desired audit log path.

Threat​

Authenticated attacker from the Internet.

Expected Remediation Time​

⌚ 60 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: H
  • User interaction: N
  • Scope: U
  • Confidentiality: N
  • Integrity: L
  • Availability: N

Temporal​

  • Exploit code maturity: P
  • Remediation level: O
  • Report confidence: C

Result​

  • Vector string: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C
  • Score:
    • Base: 2.2
    • Temporal: 2.0
  • Severity:
    • Base: Low
    • Temporal: Low

Score 4.0​

Default score using CVSS 4.0 . It may change depending on the context of the src.

Base 4.0​

  • Attack vector: N
  • Attack complexity: H
  • Attack Requirements: N
  • Privileges required: H
  • User interaction: N
  • Confidentiality (VC): N
  • Integrity (VI): L
  • Availability (VA): N
  • Confidentiality (SC): N
  • Integrity (SI): N
  • Availability (SA): N

Threat 4.0​

  • Exploit maturity: P

Result 4.0​

  • Vector string: CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
  • Score:
    • CVSS-BT: 1.2
  • Severity:
    • CVSS-BT: Low

Compliant code​

The Kubernetes configuration includes the desired log path

apiVersion: v1
kind: Pod
metadata:
  creationTimestamp: null
  labels:
    component: kube-apiserver
    tier: control-plane
  name: kube-apiserver
  namespace: kube-system
spec:
  containers:
  - command:
+  - kube-apiserver
+  - --audit-log-path=/path/to/log
    image: gcr.io/google_containers/kube-apiserver-amd64:v1.6.0
    ...

Non compliant code​

The Kubernetes configuration does not set a log file configuration

apiVersion: v1
kind: Pod
metadata:
  creationTimestamp: null
  labels:
    component: kube-apiserver
    tier: control-plane
  name: kube-apiserver
  namespace: kube-system
spec:
  containers:
  - command:
+  - kube-apiserver

Requirements​

Fixes​

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