MASTG-TEST-0298 Runtime Monitoring of Files Eligible for Backup (iOS)

Platform: iOS
Weakness: MASWE-0006
Weakness in the numbering of the MASWE beta: MASWE-0004
Profiles: L1 (basic security), L2 (advanced security), P (privacy)
Type: dynamic, hooks
Knowledge: MASTG-KNOW-0102
Best practices: MASTG-BEST-0023

Overview

This test logs every file system API use, such as open, fopen, NSFileManager, or FileHandle that creates or writes files to the app's data container at /var/mobile/Containers/Data/Application/$APP_ID to identify which files are eligible for backup.

Files stored in the tmp or Library/Caches subdirectories should not be logged, as they are not backed up.

Steps

Use MASTG-TECH-0056 to install the app.
Use MASTG-TECH-0095 to hook the relevant APIs.
Exercise the app extensively to trigger as many flows as possible and enter sensitive data wherever you can.

Observation

The output should list every file the app opens that is eligible for backup.

Evaluation

The test case fails if any sensitive files are found in the output.

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Links
Tip ta’ link	Kwistjoni
is related to	MASTG-BEST-0023 Exclude Sensitive Information from Backups (iOS)

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