界: Time and State

分布式计算是关于时间和状态的。也就是说，为了让多个组件相互通信，必须共享状态，所有这些都需要时间。

大多数程序员都会将其工作拟人化。他们会让一个控制线程以同样的方式（他们必须自己完成工作时采取的方式）执行整个程序。然而，现代计算机不同任务之间切换得非常快，在多核、多 CPU 或分布式系统中，两个事件可能完全同时发生。程序员预期的程序执行过程与实际情况之间存在差距，即存在缺陷。这些缺陷与线程、流程、时间和信息之间的意外交互有关。这些交互是通过共享状态发生的：信号量、变量、文件系统，以及总而言之，可以存储信息的任何内容。

Race Condition: App Download

Java/JSP

Abstract

应用程序通过共享存储安装应用程序，使恶意应用程序可替换要安装的程序包。

Explanation

应用程序通过共享存储安装应用程序，任何具有外部存储读/写权限的应用程序都可写入到该存储。由于存在争用情况，监控文件夹的恶意应用程序可将下载的 APK 文件交换为 APK 替换文件，安装进程会使用该替换文件取代合法更新。

示例 1： 以下代码可通过共享存储安装应用程序：


    Intent intent = new Intent(Intent.ACTION_VIEW);
    intent.setDataAndType(Uri.fromFile(new File(Environment.getExternalStorageDirectory() + "/download/" + "app.apk")), "application/vnd.android.package-archive");
    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    startActivity(intent);

References

[1] Standards Mapping - Common Weakness Enumeration CWE ID 362, CWE ID 367

[2] Standards Mapping - Common Weakness Enumeration Top 25 2022 [22] CWE ID 362

[3] Standards Mapping - Common Weakness Enumeration Top 25 2023 [21] CWE ID 362

[4] Standards Mapping - DISA Control Correlation Identifier Version 2 CCI-000366, CCI-003178

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

[6] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2012 Rule 1.3

[7] Standards Mapping - NIST Special Publication 800-53 Revision 4 CM-6 Configuration Settings (P1), SA-11 Developer Security Testing and Evaluation (P1)

[8] Standards Mapping - NIST Special Publication 800-53 Revision 5 CM-6 Configuration Settings, SA-11 Developer Testing and Evaluation

[9] Standards Mapping - OWASP Application Security Verification Standard 4.0 1.11.2 Business Logic Architectural Requirements (L2 L3), 1.11.3 Business Logic Architectural Requirements (L3), 11.1.6 Business Logic Security Requirements (L2 L3)

[10] Standards Mapping - OWASP Mobile Application Security Verification Standard 2.0 MASVS-RESILIENCE-2

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

[12] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0 Requirement 6.5.6

[13] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1 Requirement 6.5.6

[14] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2 Requirement 6.5.6

[15] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1 Requirement 6.5.6

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

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

[18] Standards Mapping - Payment Card Industry Software Security Framework 1.1 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.3 - Terminal Software Attack Mitigation

[19] Standards Mapping - Payment Card Industry Software Security Framework 1.2 Control Objective 4.2 - Critical Asset Protection, Control Objective B.3.3 - Terminal Software Attack Mitigation

[20] Standards Mapping - SANS Top 25 2009 Insecure Interaction - CWE ID 362

[21] Standards Mapping - SANS Top 25 2010 Insecure Interaction - CWE ID 362

[22] Standards Mapping - Security Technical Implementation Guide Version 3.1 APP3630.1 CAT II

[23] Standards Mapping - Security Technical Implementation Guide Version 3.4 APP3630.1 CAT II

[24] Standards Mapping - Security Technical Implementation Guide Version 3.5 APP3630.1 CAT II

[25] Standards Mapping - Security Technical Implementation Guide Version 3.6 APP3630.1 CAT II

[26] Standards Mapping - Security Technical Implementation Guide Version 3.7 APP3630.1 CAT II

[27] Standards Mapping - Security Technical Implementation Guide Version 3.9 APP3630.1 CAT II

[28] Standards Mapping - Security Technical Implementation Guide Version 3.10 APP3630.1 CAT II

[29] Standards Mapping - Security Technical Implementation Guide Version 4.2 APSC-DV-001995 CAT II

[30] Standards Mapping - Security Technical Implementation Guide Version 4.3 APSC-DV-001995 CAT II

[31] Standards Mapping - Security Technical Implementation Guide Version 4.4 APSC-DV-001995 CAT II

[32] Standards Mapping - Security Technical Implementation Guide Version 4.5 APSC-DV-001995 CAT II

[33] Standards Mapping - Security Technical Implementation Guide Version 4.6 APSC-DV-001995 CAT II

[34] Standards Mapping - Security Technical Implementation Guide Version 4.7 APSC-DV-001995 CAT II

[35] Standards Mapping - Security Technical Implementation Guide Version 4.8 APSC-DV-001995 CAT II

[36] Standards Mapping - Security Technical Implementation Guide Version 4.9 APSC-DV-001995 CAT II

[37] Standards Mapping - Security Technical Implementation Guide Version 4.10 APSC-DV-001995 CAT II

[38] Standards Mapping - Security Technical Implementation Guide Version 4.11 APSC-DV-001995 CAT II

[39] Standards Mapping - Security Technical Implementation Guide Version 4.1 APSC-DV-001995 CAT II

[40] Standards Mapping - Security Technical Implementation Guide Version 5.1 APSC-DV-001995 CAT II

[41] Standards Mapping - Security Technical Implementation Guide Version 5.2 APSC-DV-001995 CAT II

[42] Standards Mapping - Security Technical Implementation Guide Version 5.3 APSC-DV-001995 CAT II

[43] Standards Mapping - Security Technical Implementation Guide Version 6.1 APSC-DV-001995 CAT II

desc.dataflow.java.race_condition_app_download