계: Security Features

소프트웨어 보안은 보안 소프트웨어가 아닙니다. 여기서는 인증, 액세스 제어, 기밀성, 암호화, 권한 관리 등의 항목에 대해 설명합니다.

Access Control: Form Authentication Bypass

C#/VB.NET/ASP.NET

Abstract

이 응용 프로그램은 기본 API에 대한 검증되지 않은 입력을 허용하고 공격자가 인증을 우회할 수 있도록 하는 속성을 설정합니다.

Explanation

기본적으로 ASP.NET 양식 인증은 인증 프로세스 중에 기본 API에 전달하기 전에 사용자 자격 증명을 검증합니다. 문제는 aspnet:UseLegacyFormsAuthenticationTicketCompatibility 설정을 사용하여 검증되지 않은 입력이 기본 API로 전달되도록 허용하고 공격자가 인증을 우회할 수 있도록 이 기능을 수정할 수 있다는 것입니다. 이 취약점 악용에 성공한 공격자는 알려진 사용자 이름에 대해 암호 없이 ASP.NET 양식 인증을 우회할 수 있습니다. 그런 다음 사이트에서 임의의 명령을 실행하는 것을 포함하여 피해 사용자의 컨텍스트에서 모든 작업을 수행할 수 있습니다.

예제 1: 다음 예에서, aspnet:UseLegacyFormsAuthenticationTicketCompatibility이 true로 설정됩니다.


...
  <appSettings>
    <add key="aspnet:UseLegacyFormsAuthenticationTicketCompatibility" value="true" />
  </appSettings>
...

References

[1] ASP.NET appSettings Element Microsoft

[2] Microsoft Security Bulletin MS11-100 - Critical Microsoft

[3] Standards Mapping - CIS Azure Kubernetes Service Benchmark 4.0

[4] Standards Mapping - CIS Amazon Elastic Kubernetes Service Benchmark 5.0

[5] Standards Mapping - CIS Amazon Web Services Foundations Benchmark 1

[6] Standards Mapping - CIS Google Kubernetes Engine Benchmark normal

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

[8] Standards Mapping - FIPS200 AC

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

[10] Standards Mapping - NIST Special Publication 800-53 Revision 4 AC-3 Access Enforcement (P1), IA-2 Identification and Authentication (Organizational Users) (P1), IA-11 Re-Authentication (P0), SC-3 Security Function Isolation (P1)

[11] Standards Mapping - NIST Special Publication 800-53 Revision 5 AC-3 Access Enforcement, IA-2 Identification and Authentication (Organizational Users), SC-3 Security Function Isolation

[12] Standards Mapping - OWASP Top 10 2004 A3 Broken Authentication and Session Management

[13] Standards Mapping - OWASP Top 10 2007 A7 Broken Authentication and Session Management

[14] Standards Mapping - OWASP Top 10 2010 A3 Broken Authentication and Session Management

[15] Standards Mapping - OWASP Top 10 2013 A2 Broken Authentication and Session Management

[16] Standards Mapping - OWASP Top 10 2017 A2 Broken Authentication

[17] Standards Mapping - OWASP Top 10 2021 A07 Identification and Authentication Failures

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

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

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

[21] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.5.7

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

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

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

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

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

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

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

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

[30] 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

[31] Standards Mapping - SANS Top 25 2011 Porous Defenses - CWE ID 863

[32] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3610 CAT I

[33] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3610 CAT I

[34] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3610 CAT I

[35] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3610 CAT I

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

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

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

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

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

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

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

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

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

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

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

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

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

[49] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001520 CAT II, APSC-DV-001530 CAT II, APSC-DV-001540 CAT I, APSC-DV-002360 CAT II

[50] Standards Mapping - Web Application Security Consortium Version 2.00 Insufficient Authentication (WASC-01)

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

desc.configuration.dotnet.access_control_form_authentication_bypass