Kingdom: Security Features

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Kubernetes Misconfiguration: Missing Garbage Collection Threshold

YAML

Abstract

The threshold to activate garbage collection of terminated Pods is not specified.

Explanation

A Kubernetes controller initiates garbage collection to reclaim resources occupied by terminated Pods when their number exceeds a threshold. Although excessive garbage collection degrades performance, the default threshold of 12500 is too high for a typical cluster. Before any garbage collection occurs, the cluster can run low on resources and become unstable.

Example 1: The following configuration starts a Kubernetes controller manager without specifying a threshold.


...
kind: Pod
...
spec:
  containers:
    - command:
      - kube-controller-manager
    image: example.domain/kube-controller-manager:v1.9.7
    imagePullPolicy: IfNotPresent
...

References

[1] Kubernetes controller manager The Kubernetes Authors

[2] Standards Mapping - CIS Kubernetes Benchmark Recommendation 1.3.1

[3] Standards Mapping - Common Weakness Enumeration CWE ID 772

[4] Standards Mapping - Common Weakness Enumeration Top 25 2019 [21] CWE ID 772

[5] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001094

[6] Standards Mapping - NIST Special Publication 800-53 Revision 4 SC-5 Denial of Service Protection (P1)

[7] Standards Mapping - NIST Special Publication 800-53 Revision 5 SC-5 Denial of Service Protection

[8] Standards Mapping - OWASP API 2023 API8 Security Misconfiguration

[9] Standards Mapping - OWASP Top 10 2004 A9 Application Denial of Service

[10] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.9

[11] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.6

[12] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.6

[13] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.6

[14] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.6

[15] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4

[16] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4

[17] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection

[18] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection

[19] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective C.3.3 - Web Software Attack Mitigation

[20] Standards Mapping - SANS Top 25 2009 Risky Resource Management - CWE ID 404

[21] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP6080 CAT II

[22] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP6080 CAT II

[23] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP6080 CAT II

[24] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP6080 CAT II

[25] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP6080 CAT II

[26] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP6080 CAT II

[27] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP6080 CAT II

[28] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002400 CAT II

[29] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002400 CAT II

[30] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002400 CAT II

[31] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002400 CAT II

[32] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002400 CAT II

[33] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002400 CAT II

[34] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002400 CAT II

[35] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002400 CAT II

[36] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002400 CAT II

[37] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002400 CAT II

[38] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002400 CAT II

[39] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002400 CAT II

[40] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002400 CAT II

[41] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002400 CAT II

[42] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002400 CAT II

[43] Standards Mapping - Web Application Security Consortium Version 2.00 Denial of Service (WASC-10)

[44] Standards Mapping - Web Application Security Consortium 24 + 2 Denial of Service

desc.structural.yaml.kubernetes_misconfiguration_missing_garbage_collection_threshold