界: Environment

このセクションには、ソース コード以外のものでも、作成中の製品のセキュリティにとって重要なものがすべて含まれています。この分野が対象とする問題は、ソース コードに直接関係しないため、この分野の他の部分と分けました。

ASP.NET Misconfiguration: Excessive Session Timeout

Abstract
認証タイムアウトが長すぎると、ユーザー アカウントを攻撃の危険にさらす時間が長くなります。
Explanation
セッションを開いたままの時間が長いほど、攻撃者がユーザー アカウントを侵害するチャンスは増えます。セッションをアクティブなままにしておくと、攻撃者がユーザーのパスワードを総当たり攻撃で盗んだり、ユーザーのワイヤレス暗号鍵を解読したり、開いているブラウザーからセッションを乗っ取る可能性があります。認証タイムアウトが長くなると、メモリが解放されなくなり、作成されるセッションが多くなりすぎて最終的に Denial of Service 攻撃が発生する可能性があります。

例 1: 次の例は、認証タイムアウトが 1 時間に設定された ASP.NET MVC を示しています。

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


タイムアウト属性が指定されていない場合、認証タイムアウトのデフォルト値は 30 分です。
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
desc.config.dotnet.asp_dotnet_misconfiguration_excessive_session_timeout