계: Security Features

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Access Control: DLI

COBOL

Abstract

적절한 access control 없이 사용자가 제어하는 기본 키를 포함하는 EXEC DLI 명령을 실행하면 공격자가 허가 받지 않은 레코드를 볼 수 있습니다.

Explanation

DLI access control 오류는 다음 경우에 발생합니다.

1. 신뢰할 수 없는 소스에서 데이터가 프로그램에 입력됩니다.

2. 데이터는 EXEC DLI 명령에서 기본 키의 값을 지정하는 데 사용됩니다.
예제 1: 다음 코드는 메타 문자를 이스케이프 처리하고 injection 취약점을 예방하는, 매개 변수가 있는 문을 사용하여 지정한 ID와 일치하는 송장을 검색하는 EXEC DLI 명령을 생성하여 실행합니다. ID는 현재 인증된 사용자와 관련이 있는 모든 송장 목록에서 선택합니다.


...
ACCEPT ID.
EXEC DLI
  GU
  SEGMENT(INVOICES) 
  WHERE (INVOICEID = ID)
END-EXEC.
...

문제는 개발자가 ID의 가능한 모든 값을 고려할 수 없다는 점입니다. 인터페이스에서 현재 사용자의 송장 ID 목록을 생성하더라도 공격자는 이 인터페이스를 무시하고 원하는 송장을 요청할 수 있습니다. 이 예제의 코드가 사용자가 요청한 송장에 접근할 수 있는 권한이 있는지 확인하지 않기 때문에 현재 사용자의 송장이 아닌 송장도 모두 표시합니다.

References

[1] Standards Mapping - Common Weakness Enumeration CWE ID 639

[2] Standards Mapping - Common Weakness Enumeration Top 25 2023 [24] CWE ID 863

[3] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-000213, CCI-001084, CCI-002165

[4] Standards Mapping - FIPS200 AC

[5] Standards Mapping - General Data Protection Regulation (GDPR) Access Violation

[6] Standards Mapping - NIST Special Publication 800-53 Revision 4 AC-3 Access Enforcement (P1), SC-3 Security Function Isolation (P1)

[7] Standards Mapping - NIST Special Publication 800-53 Revision 5 AC-3 Access Enforcement, SC-3 Security Function Isolation

[8] Standards Mapping - OWASP Application Security Verification Standard 4.0 4.1.2 General Access Control Design (L1 L2 L3), 4.1.3 General Access Control Design (L1 L2 L3), 4.1.5 General Access Control Design (L1 L2 L3), 4.2.1 Operation Level Access Control (L1 L2 L3)

[9] Standards Mapping - OWASP Mobile 2014 M5 Poor Authorization and Authentication

[10] Standards Mapping - OWASP Mobile 2024 M3 Insecure Authentication/Authorization

[11] Standards Mapping - OWASP Top 10 2004 A2 Broken Access Control

[12] Standards Mapping - OWASP Top 10 2007 A4 Insecure Direct Object Reference

[13] Standards Mapping - OWASP Top 10 2010 A4 Insecure Direct Object References

[14] Standards Mapping - OWASP Top 10 2013 A4 Insecure Direct Object References

[15] Standards Mapping - OWASP Top 10 2017 A5 Broken Access Control

[16] Standards Mapping - OWASP Top 10 2021 A01 Broken Access Control

[17] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.2

[18] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.5.4

[19] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.8

[20] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.8

[21] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.8

[22] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.8

[23] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.8

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

[25] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 5.4 - Authentication and Access Control

[26] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 5.4 - Authentication and Access Control

[27] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 5.4 - Authentication and Access Control, Control Objective C.2.3 - Web Software Access Controls

[28] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3480.1 CAT II

[29] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3480.1 CAT I

[30] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3480.1 CAT I

[31] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3480.1 CAT I

[32] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3480.1 CAT I

[33] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3480.1 CAT I

[34] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3480.1 CAT I

[35] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[36] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[37] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[38] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[39] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[40] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[41] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[42] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[43] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[44] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[45] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[46] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[47] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[48] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[49] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-002360 CAT II

[50] Standards Mapping - Web Application Security Consortium Version 2.00 Insufficient Authorization (WASC-02)

[51] Standards Mapping - Web Application Security Consortium 24 + 2 Insufficient Authorization

desc.dataflow.cobol.access_control_dli