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.

Mail Command Injection: POP3

Abstract
신뢰할 수 없는 소스에서 만들어진 POP3 IMAP 명령을 실행하면 POP3 서버가 공격자 대신 악의적인 명령을 실행할 수 있습니다.
Explanation
POP3 명령 삽입 취약점은 공격자가 POP3 메일 서버로 전송되는 명령에 영향을 미칠 수 있을 때 발생합니다.

1. 신뢰할 수 없는 소스에서 데이터가 응용 프로그램에 입력됩니다.

2. 데이터는 응용 프로그램이 실행하는 명령을 나타내는 문자열 또는 문자열의 일부로 사용됩니다.

3. 공격자는 POP3 명령을 실행함으로써 서버가 스팸 발송과 같은 악의적 작업을 수행하도록 명령할 수 있습니다.

예제 1: 다음 코드는 HTTP 요청 매개 변수를 사용하여 POP3 서버로 전송되는 USER 및 PASS 명령을 만듭니다. 공격자는 이 매개 변수를 사용하여 서버로 전송되는 명령을 수정하고 CRLF 문자를 사용하여 새 명령을 삽입할 수 있습니다.


  ...
  String username = request.getParameter("username");
  String password = request.getParameter("password");
  ...
  POP3SClient pop3 = new POP3SClient(proto, false);
  pop3.login(username, password)
  ...
References
[1] OWASP Testing for IMAP/SMTP Injection (OTG-INPVAL-011)
[2] Vicente Aguilera Díaz MX Injection: Capturing and Exploiting Hidden Mail Servers
[3] Standards Mapping - Common Weakness Enumeration CWE ID 88, CWE ID 93, CWE ID 147
[4] Standards Mapping - Common Weakness Enumeration Top 25 2021 [25] CWE ID 077
[5] Standards Mapping - Common Weakness Enumeration Top 25 2022 [17] CWE ID 077
[6] Standards Mapping - Common Weakness Enumeration Top 25 2023 [16] CWE ID 077
[7] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001310, CCI-002754
[8] Standards Mapping - FIPS200 SI
[9] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[10] Standards Mapping - NIST Special Publication 800-53 Revision 4 SI-10 Information Input Validation (P1)
[11] Standards Mapping - NIST Special Publication 800-53 Revision 5 SI-10 Information Input Validation
[12] Standards Mapping - OWASP Application Security Verification Standard 4.0 5.2.3 Sanitization and Sandboxing Requirements (L1 L2 L3), 5.2.2 Sanitization and Sandboxing Requirements (L1 L2 L3)
[13] Standards Mapping - OWASP Mobile 2014 M1 Weak Server Side Controls
[14] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[15] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4, MASVS-PLATFORM-1
[16] Standards Mapping - OWASP Top 10 2004 A6 Injection Flaws
[17] Standards Mapping - OWASP Top 10 2007 A2 Injection Flaws
[18] Standards Mapping - OWASP Top 10 2010 A1 Injection
[19] Standards Mapping - OWASP Top 10 2013 A1 Injection
[20] Standards Mapping - OWASP Top 10 2017 A1 Injection
[21] Standards Mapping - OWASP Top 10 2021 A03 Injection
[22] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.6
[23] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1, Requirement 6.5.2
[24] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.1
[25] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.1
[26] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.1
[27] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.1
[28] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.1
[29] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4
[30] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection
[31] 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
[32] 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
[33] Standards Mapping - SANS Top 25 2010 Insecure Interaction - CWE ID 078
[34] Standards Mapping - SANS Top 25 2011 Insecure Interaction - CWE ID 078
[35] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3570 CAT I
[36] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I, APP3570 CAT I
[37] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I, APP3570 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I, APP3570 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I, APP3570 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I, APP3570 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I, APP3570 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002510 CAT I, APSC-DV-002560 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002510 CAT I, APSC-DV-002560 CAT I
[44] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002510 CAT I, APSC-DV-002560 CAT I
[45] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002510 CAT I, APSC-DV-002560 CAT I
[46] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002510 CAT I, APSC-DV-002560 CAT I
[47] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002510 CAT I, APSC-DV-002560 CAT I
[48] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002510 CAT I, APSC-DV-002560 CAT I
[49] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002510 CAT I, APSC-DV-002560 CAT I
[50] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002510 CAT I, APSC-DV-002560 CAT I
[51] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002510 CAT I, APSC-DV-002560 CAT I
[52] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002510 CAT I, APSC-DV-002560 CAT I
[53] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002510 CAT I, APSC-DV-002560 CAT I
[54] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002510 CAT I, APSC-DV-002560 CAT I
[55] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002510 CAT I, APSC-DV-002530 CAT II, APSC-DV-002560 CAT I
[56] Standards Mapping - Web Application Security Consortium Version 2.00 Mail Command Injection (WASC-30)
desc.dataflow.java.mail_command_injection_pop3