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Security advisories
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Other HW and usb switching #5

Open E3V3A opened 7 years ago

E3V3A commented 7 years ago

Hi! Great work! Too bad I didn't see this until now.

Just a couple of FYI.

The various AT commands are of course HW (baseband) dependent, and the ones mentioned in the issues are mostly for Qualcomm based phones. The ddexe filtering on Samsungs has been around for a very long time, since GT-I9100 (at least). However, since that filtering is only done on the AP, if you can get a direct connection to the AT shell, you can circumvent the filtering. Thus you will find that the AT commands available via USB vs. via internal /dev/smd0 (or equivalent) are different. In addition, there are "pseudo" AT commands that are not part of the baseband (BP) and directly handled by the datarouter...

In addition, on Samsungs there are already a ServiceMode menu and/or secret code, that allow you to do the serial mode switching (given that you have the drivers). It can also be done through the (root) command line by setprop XXXX. (I forgot the exact prop.)

Again recall the differences between the Qualcomm and Exynos + Shannon based Samsung phones.