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Implementation Vulnerability

  • Android flaw in parsing UDH for concatenated messages

    • Concatenated messages have a sequence number. Valid range is 01-FF.

      • Setting sequence to 00 triggers an unhandled invalid array exception.

  • Impact: Crashed com.android.phone process on Android G1

    • Disables all radio activity on the phone. Unable to:

      • Make/Receive phone calls

      • Send/Receive SMS

  • Privately disclosed to Google in March, fixed in Android

“cupcake” release

RingZero

https://luis.ringzero.net

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