계: Environment

이 섹션에는 소스 코드 외부에 있지만 제작 중인 제품의 보안에는 여전히 중요한 내용이 모두 포함되어 있습니다. 이 섹션에서 다루는 문제들은 소스 코드와 직접적으로 관련이 없기 때문에 나머지 섹션과 분리했습니다.

Kubernetes Misconfiguration: Unbound Scheduler

YAML

Abstract

Kubernetes 스케줄러가 외부 연결을 허용합니다.

Explanation

Kubernetes 스케줄러는 Pod가 실행되는 위치를 결정합니다. 기본적으로 스케줄러는 외부 연결의 요청을 수락합니다. 외부 연결을 통해 공격자는 충분히 보호되지 않고 보안에 민감한 API에 액세스할 수 있습니다.

예제 1: 다음 구성은 바인딩 주소 없이 Kubernetes 스케줄러를 시작합니다.


...
spec:
  containers:
    - command:
      - kube-scheduler
    image: example.domain/kube-scheduler:v1.5.2
    imagePullPolicy: IfNotPresent
    ...

References

[1] Kubernetes Scheduler The Kubernetes Authors

[2] Standards Mapping - CIS Kubernetes Benchmark Recommendation 1.4.2

[3] Standards Mapping - Common Weakness Enumeration CWE ID 20

[4] Standards Mapping - Common Weakness Enumeration Top 25 2019 [3] CWE ID 020

[5] Standards Mapping - Common Weakness Enumeration Top 25 2020 [3] CWE ID 020

[6] Standards Mapping - Common Weakness Enumeration Top 25 2021 [4] CWE ID 020

[7] Standards Mapping - Common Weakness Enumeration Top 25 2022 [4] CWE ID 020

[8] Standards Mapping - Common Weakness Enumeration Top 25 2024 [12] CWE ID 020

[9] Standards Mapping - FIPS200 CM

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

[11] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.1.3 Input Validation Requirements (L1 L2 L3), 5.1.4 Input Validation Requirements (L1 L2 L3)

[12] Standards Mapping - OWASP Mobile 2014 M1 Weak Server Side Controls

[13] Standards Mapping - OWASP Top 10 2004 A10 Insecure Configuration Management

[14] Standards Mapping - OWASP Top 10 2010 A6 Security Misconfiguration

[15] Standards Mapping - OWASP Top 10 2013 A5 Security Misconfiguration

[16] Standards Mapping - OWASP Top 10 2017 A6 Security Misconfiguration

[17] Standards Mapping - OWASP Top 10 2021 A05 Security Misconfiguration

[18] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.10

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

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

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

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

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

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

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

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

[27] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection

[28] Standards Mapping - SANS Top 25 2009 Insecure Interaction - CWE ID 020

[29] Standards Mapping - Web Application Security Consortium Version 2.00 Application Misconfiguration (WASC-15)

desc.structural.yaml.kubernetes_misconfiguration_unbound_scheduler