界: Encapsulation

封裝是要劃定清楚的界限。在網頁瀏覽器中，這可能意味著確保您的行動程式碼不會被其他行動程式碼濫用。在伺服器上，這可能意味著區分經過驗證的資料與未經驗證的資料、區分一個使用者的資料與另一個使用者的資料，或區分允許使用者查看的資料與不允許查看的資料。

Insecure IPC: Missing Content Validation

Objective-C
Swift

Abstract

延伸檢視控制器無法驗證從主機應用程式傳送的資料。

Explanation

延伸會在其檢視控制器中接收來自主機應用程式的資料，並且無法實作 SLComposeServiceViewController isContentValid 以在使用收到的不可信賴的資料前對其進行驗證。

範例 1：以下延伸檢視控制器會接收來自主機應用程式的資料，但無法實作回呼方法來進行驗證：


    #import <MobileCoreServices/MobileCoreServices.h>

    @interface ShareViewController : SLComposeServiceViewController
        ...
    @end

    @interface ShareViewController ()
        ...
    @end

    @implementation ShareViewController

    - (void)didSelectPost {
        NSExtensionItem *item = self.extensionContext.inputItems.firstObject;
        NSItemProvider *itemProvider = item.attachments.firstObject;
        ...
        // Use the received items
        ...
        [self.extensionContext completeRequestReturningItems:@[] completionHandler:nil];
    }

    ...

    @end

References

[1] David Thiel iOS Application Security: The Definitive Guide for Hackers and Developers No Starch Press

[2] SLComposeServiceViewController Apple

[3] Standards Mapping - Common Weakness Enumeration CWE ID 501

[4] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-001084, CCI-002754

[5] Standards Mapping - FIPS200 SI

[6] Standards Mapping - General Data Protection Regulation (GDPR) Indirect Access to Sensitive Data

[7] Standards Mapping - NIST Special Publication 800-53 Revision 4 SC-3 Security Function Isolation (P1), SI-10 Information Input Validation (P1)

[8] Standards Mapping - NIST Special Publication 800-53 Revision 5 SC-3 Security Function Isolation, SI-10 Information Input Validation

[9] Standards Mapping - OWASP Mobile 2014 M8 Security Decisions Via Untrusted Inputs

[10] Standards Mapping - OWASP Mobile 2024 M4 Insufficient Input/Output Validation

[11] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-CODE-4, MASVS-PLATFORM-1

[12] Standards Mapping - OWASP Top 10 2004 A1 Unvalidated Input

[13] Standards Mapping - OWASP Top 10 2021 A04 Insecure Design

[14] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1 Requirement 6.5.1

[15] Standards Mapping - Payment Card Industry Data Security Standard Version 1.2 Requirement 6.3.1.1

[16] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3510 CAT I

[17] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3510 CAT I

[18] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3510 CAT I

[19] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3510 CAT I

[20] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3510 CAT I

[21] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3510 CAT I

[22] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3510 CAT I

[23] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I

[24] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I

[25] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I

[26] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I

[27] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I

[28] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I

[29] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I

[30] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I

[31] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I

[32] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I

[33] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I

[34] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I

[35] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I

[36] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I

[37] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-002360 CAT II, APSC-DV-002560 CAT I

[38] Standards Mapping - Web Application Security Consortium Version 2.00 Improper Input Handling (WASC-20)

desc.structural.objc.insecure_ipc_missing_content_validation

Abstract

延伸檢視控制器無法驗證從主機應用程式傳送的資料。

Explanation

延伸會在其檢視控制器中接收來自主機應用程式的資料，並且無法實作 SLComposeServiceViewController isContentValid 以在使用收到的不可信賴的資料前對其進行驗證。

範例 1：以下延伸檢視控制器會從主機應用程式接收資料，但無法實作 SLComposeServiceViewController isContentValid 回呼方法來進行驗證：


    import MobileCoreServices

    class ShareViewController: SLComposeServiceViewController {
        
        ... 

        override func didSelectPost() {
            let extensionItem = extensionContext?.inputItems.first as! NSExtensionItem
            let itemProvider = extensionItem.attachments?.first as! NSItemProvider
            ...
            // Use the received items
            ...
            self.extensionContext?.completeRequestReturningItems([], completionHandler:nil)
        }

        ...
    }