계: Security Features

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

Access Control: Anonymous LDAP Bind

Abstract

적절한 access control 없이 사용자가 제어하는 값을 포함하는 LDAP 문을 실행하면 공격자가 허가 받지 않은 레코드에 접근할 수 있습니다.

Explanation

사실상 authentication 없이 익명의 바인딩에서 LDAP 쿼리를 실행하면 공격자가 빈약하게 구성된 LDAP 환경을 남용할 수 있습니다.

예제 1: 다음 코드는 익명 바운딩을 사용하여 DirectoryEntry de를 생성합니다.


...
de = new DirectoryEntry("LDAP://ad.example.com:389/ou=People,dc=example,dc=com");
...

de에 대해 실행된 모든 LDAP 쿼리는 authentication 및 access control 없이 수행됩니다. 공격자는 디렉터리의 액세스 제어 메커니즘으로 보호되는 레코드에 대한 액세스를 얻기 위해 예기치 못한 방법으로 이러한 쿼리 중 하나를 조작할 수도 있습니다.

References

[1] Standards Mapping - CIS Azure Kubernetes Service Benchmark 2

[2] Standards Mapping - CIS Amazon Elastic Kubernetes Service Benchmark 1

[3] Standards Mapping - CIS Amazon Web Services Foundations Benchmark 2

[4] Standards Mapping - CIS Google Kubernetes Engine Benchmark confidentiality

[5] Standards Mapping - CIS Kubernetes Benchmark complete

[6] Standards Mapping - Common Weakness Enumeration CWE ID 285

[7] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-000213, CCI-000804, 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)

[11] Standards Mapping - NIST Special Publication 800-53 Revision 5 AC-3 Access Enforcement

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

[13] Standards Mapping - OWASP Top 10 2007 A10 Failure to Restrict URL Access

[14] Standards Mapping - OWASP Top 10 2010 A8 Failure to Restrict URL Access

[15] Standards Mapping - OWASP Top 10 2013 A7 Missing Function Level Access Control

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

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

[18] Standards Mapping - OWASP Application Security Verification Standard 4.0 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), 13.1.4 Generic Web Service Security Verification Requirements (L2 L3)

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

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

[21] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-AUTH-1

[22] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.2, Requirement 7.2

[23] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.5.10, Requirement 7.2

[24] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.8, Requirement 7.2

[25] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.8, Requirement 7.2

[26] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.8, Requirement 7.2

[27] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.8, Requirement 7.2

[28] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.8, Requirement 7.2

[29] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4, Requirement 7.3.2

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

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

[32] 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

[33] Standards Mapping - SANS Top 25 2009 Porous Defenses - CWE ID 285

[34] Standards Mapping - SANS Top 25 2010 Porous Defenses - CWE ID 285

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

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

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

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

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

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

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

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

[43] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001870 CAT II, APSC-DV-002360 CAT II

[44] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001870 CAT II, APSC-DV-002360 CAT II

[45] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001870 CAT II, APSC-DV-002360 CAT II

[46] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001870 CAT II, APSC-DV-002360 CAT II

[47] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001870 CAT II, APSC-DV-002360 CAT II

[48] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001870 CAT II, APSC-DV-002360 CAT II

[49] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001870 CAT II, APSC-DV-002360 CAT II

[50] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001870 CAT II, APSC-DV-002360 CAT II

[51] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001870 CAT II, APSC-DV-002360 CAT II

[52] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001870 CAT II, APSC-DV-002360 CAT II

[53] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001870 CAT II, APSC-DV-002360 CAT II

[54] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001870 CAT II, APSC-DV-002360 CAT II

[55] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-000460 CAT I, APSC-DV-000470 CAT II, APSC-DV-001870 CAT II, APSC-DV-002360 CAT II

[56] 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-001870 CAT II, APSC-DV-002360 CAT II

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

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

desc.dataflow.dotnet.access_control_anonymous_ldap_bind

Abstract

적절한 access control 없이 사용자가 제어하는 값을 포함하는 LDAP 문을 실행하면 공격자가 허가 받지 않은 레코드에 접근할 수 있습니다.

Explanation

사실상 authentication 없이 익명의 바인딩에서 LDAP 쿼리를 실행하면 공격자가 빈약하게 구성된 LDAP 환경을 남용할 수 있습니다.

예제 1: 다음 코드는 ldap_simple_bind_s()를 사용하여 LDAP 디렉터리에 익명으로 바인딩합니다.


...
rc = ldap_simple_bind_s( ld, NULL, NULL );
  if ( rc != LDAP_SUCCESS ) {
    ...
  }
...

ld에 대해 실행된 모든 LDAP 쿼리는 authentication 및 access control 없이 수행됩니다. 공격자는 디렉터리의 액세스 제어 메커니즘으로 보호되는 레코드에 대한 액세스를 얻기 위해 예기치 못한 방법으로 이러한 쿼리 중 하나를 조작할 수도 있습니다.