Cubic

Broken sudoers permissions?

Asked by Creepycrafter Playername

After minimal customization (apt update, apt upgrade, very few packages) i can't use sudo or su and all GUI applications that use root break/don't start. If I run sudo from the terminal it says "/usr/bin/sudo must be owned by uid 0 and have the setuid bit set". If I ll /usr/bin/sudo it says "-rwxrwxrwx 1 root root 161448 Jan 31 17:07 /usr/bin/sudo*". The "Access" part of "stat /usr/bin/sudo" says (0777/-rwxrwxrwx) Uid: (0/root) Gid: (0/root)
I am running Ubuntu 19.10 both as the modified image and host OS.
What can I do to fix this and get my ISO working properly?

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Manfred Hampl (m-hampl) said : 		#1

Protection settings on /usr/bin/sudo have to be
-rwsr-xr-x 1 root root
or in stat: (4755/-rwsr-xr-x) Uid: (0/root) Gid: (0/root)

Is the problem on your host, or only inside the images?

If it is on the host, you can follow https://www.psychocats.net/ubuntu/resetpassword from the beginning to the remount command and then chmod the file to the correct value.

If it is in the images, then your customization is wrong.

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soogeun (sk1561) said : 		#2

I have exact same problem.
My problem is only inside the image.
How can I find wrong point of customization?
Or is there any cubic manual?

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Manfred Hampl (m-hampl) said : 		#3

Which operating system (including release number) and cubic version are you using?
Which file systems are you using?

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Creepycrafter Playername (creepycrafter24) said : 		#4

I am using Ubuntu 19.10 on an ext4 partition with the project on a seperate ntfs drive and the latest version of cubic available at the time in the PPA

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Manfred Hampl (m-hampl) said : 		#5

I assume the problem is the ntfs drive. That file system does not know about setuid bits.

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soogeun (sk1561) said : 		#6

Thanks all answers.
I solved this problem.
The problem was ubuntu 19.10.
No problem was happened, when I made custom iso by cubic on ubuntu 18.04.
So, combination of cubic on on ubuntu 18.04 and ubuntu 18.04 original iso makes no problem.

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