界: Security Features

ソフトウェアのセキュリティは、セキュリティソフトウェアではありません。ここでは、認証、アクセス制御、機密性、暗号化、権限管理などのトピックについて説明します。

ASP.NET Misconfiguration: Persistent Authentication

C#/VB.NET/ASP.NET

Abstract

Persistent Authentication チケットが使用される場合、ユーザーはセッション乗っ取り攻撃を受ける可能性があります。

Explanation

FormsAuthentication.RedirectFromLoginPage() メソッドにより Authentication チケットが発行されます。この認証チケットを使用すると、ユーザーは一定期間認証された状態となります。このメソッドが 2 番目の引数 false と一緒に呼び出されると、web.config で設定される期間は有効のままとなるテンポラリの Authentication チケットが発行されます。このメソッドが 2 番目の引数 true と一緒に呼び出されると、Persistent Authentication チケットが発行されます。.NET 2.0 では、Persistent Authentication チケットの継続期間は web.config の値が基準となりますが、.NET 1.1 では、Persistent Authentication チケットに 15 年という途方もなく長いデフォルトの継続期間が設定されています。

Persistent Authentication チケットを長期間有効のままにすることを許可すると、次のようにユーザーおよびシステムが脆弱性にさらされることになります。

ログアウトに失敗したユーザーに関するセッション乗っ取り攻撃を受ける期間が長くなる。

攻撃者が推測可能な有効なセッション ID の平均数が増大する。

攻撃者がユーザーセッションの乗っ取りに成功し悪用する期間が長くなる。

References

[1] Jeff Prosise The Keep Sites Running Smoothly By Avoiding These 10 Common ASP.NET Pitfalls MSDN Magazine

[2] Standards Mapping - Common Weakness Enumeration CWE ID 302

[3] Standards Mapping - Common Weakness Enumeration Top 25 2019 [13] CWE ID 287

[4] Standards Mapping - Common Weakness Enumeration Top 25 2020 [14] CWE ID 287

[5] Standards Mapping - Common Weakness Enumeration Top 25 2021 [14] CWE ID 287

[6] Standards Mapping - Common Weakness Enumeration Top 25 2022 [14] CWE ID 287

[7] Standards Mapping - Common Weakness Enumeration Top 25 2023 [13] CWE ID 287

[8] Standards Mapping - Common Weakness Enumeration Top 25 2024 [14] CWE ID 287

[9] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001185, CCI-001941, CCI-001942

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

[11] Standards Mapping - NIST Special Publication 800-53 Revision 4 IA-2 Identification and Authentication (Organizational Users) (P1), IA-11 Re-Authentication (P0), SC-23 Session Authenticity (P1)

[12] Standards Mapping - NIST Special Publication 800-53 Revision 5 IA-2 Identification and Authentication (Organizational Users), SC-23 Session Authenticity

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

[14] Standards Mapping - OWASP Application Security Verification Standard 4.0 2.7.1 Out of Band Verifier Requirements (L1 L2 L3), 2.7.2 Out of Band Verifier Requirements (L1 L2 L3), 2.7.3 Out of Band Verifier Requirements (L1 L2 L3), 2.8.4 Single or Multi Factor One Time Verifier Requirements (L2 L3), 2.8.5 Single or Multi Factor One Time Verifier Requirements (L2 L3), 2.10.1 Service Authentication Requirements (L2 L3), 3.7.1 Defenses Against Session Management Exploits (L1 L2 L3), 9.2.3 Server Communications Security Requirements (L2 L3)

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

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

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

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

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

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

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

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

[23] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.3

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

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

[26] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.10

[27] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.10

[28] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.10

[29] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.10

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

[31] Standards Mapping - Payment Card Industry Data Security Standard Version 4.0.1 Requirement 6.2.4

[32] Standards Mapping - Payment Card Industry Software Security Framework 1.0 Control Objective 4.2 - Critical Asset Protection

[33] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection

[34] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection

[35] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3405 CAT I

[36] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3405 CAT I

[37] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3405 CAT I

[38] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3405 CAT I

[39] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3405 CAT I

[40] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3405 CAT I

[41] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3405 CAT I

[42] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002240 CAT I

[43] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002240 CAT I

[44] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002240 CAT I

[45] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002240 CAT I

[46] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002240 CAT I

[47] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002240 CAT I

[48] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002240 CAT I

[49] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002240 CAT I

[50] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002240 CAT I

[51] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002240 CAT I

[52] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002240 CAT I

[53] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002240 CAT I

[54] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002240 CAT I

[55] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-001530 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002240 CAT I

[56] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-001530 CAT II, APSC-DV-001620 CAT II, APSC-DV-001630 CAT II, APSC-DV-002240 CAT I

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

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

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