界: Encapsulation

カプセル化とは、強い境界線を引くことです。Web ブラウザの場合は、自分のモバイル コードが他のモバイル コードに悪用されないようにすることを意味します。サーバー上では、検証されたデータと検証されていないデータ、あるユーザーのデータと別のユーザーのデータ、またはユーザーが見ることを許可されたデータと許可されていないデータの区別などを意味する場合があります。

Insecure IPC: Missing Sender Verification

Abstract
アプリケーションは、URL ベースのプロシージャ間通信 (IPC) コールの送信者の検証に失敗します。
Explanation
サードパーティ アプリケーションまたは webview が URL を使用してアプリケーションと通信する際、受信側のアプリケーションは、通信すると想定されるアプリケーションの許可リストと送信者が一致することを検証する必要があります。受信側のアプリケーションは、UIApplicationDelegate application:openURL:options: または UIApplicationDelegate application:openURL:sourceApplication:annotation: 委任メソッドを使用してコール URL の生成元を検証することもできます。

例 1: 次の UIApplicationDelegate application:openURL:options: 委任メソッドの実装では IPC コールの送信者の検証に失敗し、単にコール URL を処理します。


- (BOOL)application:(UIApplication *)app openURL:(NSURL *)url options:(NSDictionary<NSString *,id> *)options {
NSString *theQuery = [[url query] stringByRemovingPercentEncoding:NSUTF8StringEncoding];
NSArray *chunks = [theQuery componentsSeparatedByString:@"&"];
for (NSString* chunk in chunks) {
NSArray *keyval = [chunk componentsSeparatedByString:@"="]; NSString *key = [keyval objectAtIndex:0];
NSString *value = [keyval objectAtIndex:1];
// Do something with your key and value
}
return YES;
}
References
[1] David Thiel iOS Application Security: The Definitive Guide for Hackers and Developers No Starch Press
[2] UIApplicationDelegate Apple
[3] Standards Mapping - Common Weakness Enumeration CWE ID 501, CWE ID 939
[4] Standards Mapping - Common Weakness Enumeration Top 25 2020 [25] CWE ID 862
[5] Standards Mapping - Common Weakness Enumeration Top 25 2021 [18] CWE ID 862
[6] Standards Mapping - Common Weakness Enumeration Top 25 2022 [16] CWE ID 862
[7] Standards Mapping - Common Weakness Enumeration Top 25 2023 [11] CWE ID 862
[8] Standards Mapping - Common Weakness Enumeration Top 25 2024 [9] CWE ID 862
[9] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001084, CCI-002754
[10] Standards Mapping - FIPS200 SI
[11] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[12] Standards Mapping - NIST Special Publication 800-53 Revision 4 SC-3 Security Function Isolation (P1), SI-10 Information Input Validation (P1)
[13] Standards Mapping - NIST Special Publication 800-53 Revision 5 SC-3 Security Function Isolation, SI-10 Information Input Validation
[14] 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)
[15] Standards Mapping - OWASP Mobile 2014 M8 Security Decisions Via Untrusted Inputs
[16] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[17] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4, MASVS-PLATFORM-1
[18] Standards Mapping - OWASP Top 10 2004 A1 Unvalidated Input
[19] Standards Mapping - OWASP Top 10 2021 A04 Insecure Design
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.1
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1
[22] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[23] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I
[24] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I
[25] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I
[26] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I
[27] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I
[28] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I
[29] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I
[30] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I
[31] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I
[32] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I
[33] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I
[34] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I
[35] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I
[36] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I
[37] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I
[44] Standards Mapping - Web Application Security Consortium Version 2.00 Improper Input Handling (WASC-20)
desc.structural.objc.insecure_ipc_missing_sender_verification
Abstract
アプリケーションは、URL ベースのプロシージャ間通信 (IPC) コールの送信者の検証に失敗します。
Explanation
サードパーティ アプリケーションまたは wewbview が URL を使用してアプリケーションと通信する際、受信側のアプリケーションは、通信すると想定されるアプリケーションの許可リストと送信者が一致することを検証する必要があります。受信側のアプリケーションは、UIApplicationDelegate application:openURL:options: または UIApplicationDelegate application:openURL:sourceApplication:annotation: 委任メソッドを使用してコール URL の生成元を検証することもできます。

例 1: 次の UIApplicationDelegate application:openURL:options: 委任メソッドの実装では IPC コールの送信者の検証に失敗し、単にコール URL を処理します。


func application(app: UIApplication, openURL url: NSURL, options: [String : AnyObject]) -> Bool {
return processCall(url)
}
References
[1] David Thiel iOS Application Security: The Definitive Guide for Hackers and Developers No Starch Press
[2] UIApplicationDelegate Apple
[3] Standards Mapping - Common Weakness Enumeration CWE ID 501, CWE ID 939
[4] Standards Mapping - Common Weakness Enumeration Top 25 2020 [25] CWE ID 862
[5] Standards Mapping - Common Weakness Enumeration Top 25 2021 [18] CWE ID 862
[6] Standards Mapping - Common Weakness Enumeration Top 25 2022 [16] CWE ID 862
[7] Standards Mapping - Common Weakness Enumeration Top 25 2023 [11] CWE ID 862
[8] Standards Mapping - Common Weakness Enumeration Top 25 2024 [9] CWE ID 862
[9] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001084, CCI-002754
[10] Standards Mapping - FIPS200 SI
[11] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data
[12] Standards Mapping - NIST Special Publication 800-53 Revision 4 SC-3 Security Function Isolation (P1), SI-10 Information Input Validation (P1)
[13] Standards Mapping - NIST Special Publication 800-53 Revision 5 SC-3 Security Function Isolation, SI-10 Information Input Validation
[14] 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)
[15] Standards Mapping - OWASP Mobile 2014 M8 Security Decisions Via Untrusted Inputs
[16] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation
[17] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4, MASVS-PLATFORM-1
[18] Standards Mapping - OWASP Top 10 2004 A1 Unvalidated Input
[19] Standards Mapping - OWASP Top 10 2021 A04 Insecure Design
[20] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.1
[21] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1
[22] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I
[23] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I
[24] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I
[25] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I
[26] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I
[27] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I
[28] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I
[29] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I
[30] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I
[31] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I
[32] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I
[33] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I
[34] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I
[35] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I
[36] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I
[37] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I
[38] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I
[39] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I
[40] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I
[41] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I
[42] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I
[43] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I
[44] Standards Mapping - Web Application Security Consortium Version 2.00 Improper Input Handling (WASC-20)
desc.structural.swift.insecure_ipc_missing_sender_verification