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forest
forest
1:20 AM
@ConorMancone No idea about that specific claim (I didn't look into it), but you can in some cases exploit phones only by sending an SMS (e.g. with MMS like that Stagefright some years back).
@ConorMancone I believe SIM cards can actually issue certain commands to phones.
@A.Hersean You forgot the baseband processor. And on older systems, the baseband was trusted and could take over the main OS (it can usually DMA), but on newer systems, it's isolated a bit better (not perfectly, of course). On modern Androids, I believe it runs an L4 microkernel variant.
 
 
2 hours later…
forest
forest
2:59 AM
0
A: Methods root can use to elevate itself to kernel mode

FisRoot is designed to do whatever he wants on the system! He is the system administrator. He is the boss there. There is no reason to limit him in any way! As there will always be a method to go in somehow - i.e. compile kernel space module and force kernel to load it on next reboot or modify some...

^ This is so incorrect it hurts.
Do people not even read questions anymore?
There is no reason to limit him in any way! <- It's like this guy has no idea how caps work.
Or SELinux. Or chroot (in a pinch). Or namespaces. Or LSMs. Or PaX. Or write-once sysctls.
Or Linux IMA. Or module signing. Or AIDE. Or LSMs.
 
 
6 hours later…
Vipul Nair
Vipul Nair
9:30 AM
@forest i have never seen your questions get answered here.TBH
You are wayy far above us
 
forest
forest
I've gotten questions answered. I was linked to a great research paper in my DMA question.
It's probably just that there aren't many Linux administration security folks here.
Lots of web security, lots of binary exploitation, but I guess not much *nix admin security.
 
Vipul Nair
Vipul Nair
You are way inside OS internals.Would probably take me years to reach there.
 

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