Difference between revisions of "Sandbox"

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Apple's software based [[Wikipedia:Mandatory access control|mandatory access control]] that was introduced in [[iOS]] 2.0. It is a higher level layer on top of the XNU implementation of the TrustedBSD MAC framework.
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== Problems ==
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*In addition to the new set of frameworks in 2.0, applications had to be tweaked to use the new sandbox.
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*For applications to run, they need to have a folder called [[_Codesign]] with a file inside called [[CodeResources]]
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*If a [[userland]] exploit was discovered in an [[App Store]] app, the [[CodeResources]] would become invalid when a file was injected.
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*The checks are not as hard on built in applications in the [[firmware]] [http://pastebin.com/6C55pTxf] (only version.plist is checked to prevent a [[soft upgrade]] )
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== Exploits ==
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The dependency on the [[CodeResources]] file makes it vulnerable to the [[Incomplete Codesign Exploit]]
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== More Info ==
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* [http://iphonedevwiki.net/index.php/Seatbelt Seatbelt article on iPhoneDevWiki]
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* [https://developer.apple.com/app-sandboxing/ Apple's articles about App Sandboxing for developers]

Latest revision as of 20:31, 19 September 2014

Apple's software based mandatory access control that was introduced in iOS 2.0. It is a higher level layer on top of the XNU implementation of the TrustedBSD MAC framework.

Problems

  • In addition to the new set of frameworks in 2.0, applications had to be tweaked to use the new sandbox.
  • For applications to run, they need to have a folder called _Codesign with a file inside called CodeResources
  • If a userland exploit was discovered in an App Store app, the CodeResources would become invalid when a file was injected.
  • The checks are not as hard on built in applications in the firmware [1] (only version.plist is checked to prevent a soft upgrade )

Exploits

The dependency on the CodeResources file makes it vulnerable to the Incomplete Codesign Exploit

More Info