계: Input Validation and Representation

입력 검증 및 표현 문제는 메타 문자, 대체 인코딩 및 숫자 표현 때문에 발생합니다. 보안 문제는 입력을 신뢰하기 때문에 발생합니다. 문제로는 "Buffer Overflows", "Cross-Site Scripting" 공격, "SQL Injection", 그 외 여러 가지가 있습니다.

Setting Manipulation: User-Controlled Approval Action

Abstract
이 응용 프로그램을 사용하면 사용자가 승인 요청을 처리하기 위한 작업을 정의할 수 있어 사기 트랜잭션 또는 권한 에스컬레이션이 발생할 수 있습니다.
Explanation
사용자가 승인 요청 처리 작업을 제어할 수 있도록 허용하면 악의적인 사용자가 합법적인 요청을 거부하거나 사기 요청을 승인할 수 있으므로 데이터 손상, 서비스 거부(DoS) 또는 권한 에스컬레이션이 발생할 수 있습니다.

예제 1: 다음 코드는 외부 사용자 입력이 ProcessWorkitemRequest.setAction() 호출에서 승인 작업을 제어하도록 허용합니다.

void processRequest() {
  String workItemId = ApexPages.currentPage().getParameters().get('Id');
  String action = ApexPages.currentPage().getParameters().get('Action');

  Approval.ProcessWorkitemRequest req = new Approval.ProcessWorkitemRequest();
  req.setWorkitemId(workItemId);
  req.setAction(action);

  Approval.ProcessResult res =  Approval.process(req);
  ...
}


공격자가 이 코드를 악용할 수 있는 한 가지 방법은 처음에 자신의 계정과 관련된 역할이나 액세스 권한을 수정하기 위한 승인 요청을 제출하는 것입니다. 그런 다음 쿼리 매개 변수를 조작하여 요청이 부적절하게 승인되도록 할 수 있으므로 잠재적인 무단 권한 에스컬레이션이 발생할 수 있습니다.
References
[1] Standards Mapping - Common Weakness Enumeration CWE ID 15
[2] Standards Mapping - Common Weakness Enumeration Top 25 2024 [12] CWE ID 020
[3] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-002754
[4] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[5] Standards Mapping - NIST Special Publication 800-53 Revision 4 SI-10 Information Input Validation (P1)
[6] Standards Mapping - NIST Special Publication 800-53 Revision 5 SI-10 Information Input Validation
[7] Standards Mapping - OWASP Mobile 2014 M8 Security Decisions Via Untrusted Inputs
[8] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[9] Standards Mapping - OWASP Top 10 2004 A1 Unvalidated Input
[10] Standards Mapping - OWASP Top 10 2021 A05 Security Misconfiguration
[11] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.1
[12] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1
[13] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[14] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[15] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[16] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[17] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[18] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4
[19] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[20] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation
[21] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.1 - Terminal Software Attack Mitigation, Control Objective B.3.1.1 - Terminal Software Attack Mitigation, Control Objective C.3.2 - Web Software Attack Mitigation
[22] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[23] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I
[24] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I
[25] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I
[26] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I
[27] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I
[28] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I
[29] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002560 CAT I
[30] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002560 CAT I
[31] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002560 CAT I
[32] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002560 CAT I
[33] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002560 CAT I
[34] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002560 CAT I
[35] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002560 CAT I
[36] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002560 CAT I
[37] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002560 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002560 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002560 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002560 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002560 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002530 CAT II, APSC-DV-002560 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002530 CAT II, APSC-DV-002560 CAT I
[44] Standards Mapping - Web Application Security Consortium Version 2.00 Improper Input Handling (WASC-20)
desc.dataflow.apex.setting_manipulation_user_controlled_approval_action