계: Environment

이 섹션에는 소스 코드 외부에 있지만 제작 중인 제품의 보안에는 여전히 중요한 내용이 모두 포함되어 있습니다. 이 섹션에서 다루는 문제들은 소스 코드와 직접적으로 관련이 없기 때문에 나머지 섹션과 분리했습니다.

ASP.NET Misconfiguration: Excessive Session Timeout

C#/VB.NET/ASP.NET

Abstract

인증 시간 초과가 지나치게 길면 공격자가 사용자 계정을 침해할 수 있는 시간이 늘어납니다.

Explanation

세션을 더 오래 열어둘수록, 공격자가 사용자 계정을 손상시킬 수 있는 기회는 더 커집니다. 세션이 활성화 상태라면 공격자는 사용자의 암호를 무차별 대입하거나 사용자의 무선 암호화 키를 불법으로 복제하거나 열려 있는 브라우저에서 세션을 제멋대로 쓸 수도 있습니다. 또한 인증 시간 초과가 길면 메모리가 해제되지 않으며 충분히 많은 수의 세션이 생성되는 경우 결국 Denial of Service가 발생할 수 있습니다.

예제 1: 다음 예제는 인증 시간 초과가 1시간으로 구성된 ASP.NET MVC를 보여줍니다.


...
<configuration>
  <system.web>
  <authentication>
    <forms
      timeout="60" />
  </authentication>
  </system.web>
</configuration>
...

timeout 속성이 지정되지 않은 경우 인증 시간 초과는 기본적으로 30분으로 설정됩니다.

References

[1] MSDN ASP.NET Session State

[2] Standards Mapping - Common Weakness Enumeration CWE ID 613

[3] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-000879, CCI-002361, CCI-004190

[4] Standards Mapping - FIPS200 IA

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

[6] Standards Mapping - NIST Special Publication 800-53 Revision 4 AC-12 Session Termination (P2), MA-4 Nonlocal Maintenance (P2)

[7] Standards Mapping - NIST Special Publication 800-53 Revision 5 AC-12 Session Termination, MA-4 Nonlocal Maintenance

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

[9] Standards Mapping - OWASP Application Security Verification Standard 4.0 2.8.1 Single or Multi Factor One Time Verifier Requirements (L1 L2 L3), 2.8.6 Single or Multi Factor One Time Verifier Requirements (L2 L3), 3.3.1 Session Logout and Timeout Requirements (L1 L2 L3), 3.3.2 Session Logout and Timeout Requirements (L1 L2 L3), 3.3.4 Session Logout and Timeout Requirements (L2 L3), 3.6.1 Re-authentication from a Federation or Assertion (L3), 3.6.2 Re-authentication from a Federation or Assertion (L3)

[10] Standards Mapping - OWASP Mobile 2014 M9 Improper Session Handling

[11] Standards Mapping - OWASP Mobile 2024 M8 Security Misconfiguration

[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 - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.3, Requirement 8.5.15

[19] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.5.7, Requirement 8.5.15

[20] Standards Mapping - Payment Card Industry Data Security Standard Version 2.0 Requirement 6.5.8, Requirement 8.5.15

[21] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.10, Requirement 8.1.8

[22] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.10, Requirement 8.1.8

[23] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.10, Requirement 8.1.8

[24] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.10, Requirement 8.1.8

[25] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0 Requirement 6.2.4, Requirement 8.2.8

[26] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection, Control Objective 5.3 - Authentication and Access Control

[27] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective 5.3 - Authentication and Access Control

[28] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective 5.3 - Authentication and Access Control, Control Objective C.2.1.2 - Web Software Access Controls, Control Objective C.2.3.2 - Web Software Access Controls

[29] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3415 CAT II

[30] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3415 CAT II

[31] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3415 CAT II

[32] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3415 CAT II

[33] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3415 CAT II

[34] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3415 CAT II

[35] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3415 CAT II

[36] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-000070 CAT II, APSC-DV-000080 CAT II, APSC-DV-001980 CAT II

[37] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-000070 CAT II, APSC-DV-000080 CAT II, APSC-DV-001980 CAT II

[38] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-000070 CAT II, APSC-DV-000080 CAT II, APSC-DV-001980 CAT II

[39] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-000070 CAT II, APSC-DV-000080 CAT II, APSC-DV-001980 CAT II

[40] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-000070 CAT II, APSC-DV-000080 CAT II, APSC-DV-001980 CAT II

[41] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-000070 CAT II, APSC-DV-000080 CAT II, APSC-DV-001980 CAT II

[42] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-000070 CAT II, APSC-DV-000080 CAT II, APSC-DV-001980 CAT II

[43] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-000070 CAT II, APSC-DV-000080 CAT II, APSC-DV-001980 CAT II

[44] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-000070 CAT II, APSC-DV-000080 CAT II, APSC-DV-001980 CAT II

[45] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-000070 CAT II, APSC-DV-000080 CAT II, APSC-DV-001980 CAT II

[46] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-000070 CAT II, APSC-DV-000080 CAT II, APSC-DV-001980 CAT II

[47] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-000070 CAT II, APSC-DV-000080 CAT II, APSC-DV-001980 CAT II

[48] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-000070 CAT II, APSC-DV-000080 CAT II, APSC-DV-001980 CAT II

[49] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-000070 CAT II, APSC-DV-000080 CAT II, APSC-DV-001980 CAT II

[50] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-000070 CAT II, APSC-DV-000080 CAT II, APSC-DV-001980 CAT II

[51] Standards Mapping - Web Application Security Consortium Version 2.00 Insufficient Session Expiration (WASC-47)

[52] Standards Mapping - Web Application Security Consortium 24 + 2 Insufficient Session Expiration

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