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[0x06c] Add Patching Example for Debugging iOS Apps #1932

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Oct 26, 2021
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[0x06c] Add Patching Example for Debugging iOS Apps #1932

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36b9ab8
added ios app patching for debugging
su-vikas Jul 22, 2021
404e085
Update Document/0x06c-Reverse-Engineering-and-Tampering.md
cpholguera Oct 14, 2021
959a46d
Update Document/0x06c-Reverse-Engineering-and-Tampering.md
cpholguera Oct 14, 2021
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6 changes: 6 additions & 0 deletions Document/0x06c-Reverse-Engineering-and-Tampering.md
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Expand Up @@ -756,6 +756,12 @@ Successfully inserted a LC_LOAD_DYLIB command for arm64
Writing executable to Payload/UnCrackable Level 1.app/UnCrackable Level 1...
```

#### Patching Example: Making an App Debuggable

By default, an app available on the Apple App Store is not debuggable. In order to debug an iOS application, it must have the `get-task-allow` entitlement enabled. This entitlement allows other processes (like a debugger) to attach to the app. Xcode is not adding the `get-task-allow` entitlement in a distribution provisioning profile; it is only whitelisted and added in a development provisioning profile.

Thus, to debug an iOS application obtained from the App Store, it needs to be re-signed with a development provisioning profile with the `get-task-allow` entitlement. How to re-sign an application is discussed in the next section.

#### Repackaging and Re-Signing

Of course, tampering an app invalidates the main executable's code signature, so this won't run on a non-jailbroken device. You'll need to replace the provisioning profile and sign both the main executable and the files you've made include (e.g. `FridaGadget.dylib`) with the certificate listed in the profile.
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