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A comment on Backdoor with root access found from OnePlus phones. Parent comment

Re:Backdoor with root access found from OnePlus phones by dmos62 on Tuesday November 14, 2017 @10:53AM (#15696071)
Reference, or explanation?
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Re:Backdoor with root access found from OnePlus phones by danjoc on Tuesday November 14, 2017 @11:59AM (#15696817)
https://en.wikipedia.org/wiki/Mobile_baseband

If it has GSM/LTE/CDMA/etc baseband processor with closed implementation, assume it has remote root backdoor. Samsung has already been caught.

osmocombb tried to solve this. That project is essentially dead.

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Re:Backdoor with root access found from OnePlus phones by lurker12390879 on Tuesday November 14, 2017 @12:39PM (#15697262)
Librem 5 is a partial solution because the baseband has no access to the system.
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Re:Backdoor with root access found from OnePlus phones by nyargh on Tuesday November 14, 2017 @01:39PM (#15697868)
Still has DMA, no?
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Re:Backdoor with root access found from OnePlus phones by kogepathic on Tuesday November 14, 2017 @02:35PM (#15698372)
No, the baseband radio will not be connected to the SoC via DMA.

They are proposing to use an external baseband with a USB or UART interface to the main SoC and a kill switch.

https://forums.puri.sm/t/level-of-freedom-of-librem-phone-es...

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