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Merge branch 'sudo-patch' of https://github.com/deathgrippin/qubes-doc into deathgrippin-sudo-patch

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Andrew David Wong 2020-05-10 08:42:39 -05:00
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34
user/security-in-qubes/vm-sudo.md
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@ -61,20 +61,20 @@ Background ([/etc/sudoers.d/qubes](https://github.com/QubesOS/qubes-core-agent-l
Below is a complete list of configuration made according to the above statement, with (not necessary complete) list of mechanisms depending on each of them:
1. sudo (/etc/sudoers.d/qubes):
1. sudo (`/etc/sudoers.d/qubes`):
user ALL=(ALL) NOPASSWD: ALL
(...)
- easy user->root access (main option for the user)
- qvm-usb (not really working, as of R2)
- Easy user -> root access (main option for the user).
- `qvm-usb` (not really working, as of R2).
2. PolicyKit (/etc/polkit-1/rules.d/00-qubes-allow-all.rules):
2. PolicyKit (`/etc/polkit-1/rules.d/00-qubes-allow-all.rules`):
//allow any action, detailed reasoning in sudoers.d/qubes
polkit.addRule(function(action,subject) { return polkit.Result.YES; });
and /etc/polkit-1/localauthority/50-local.d/qubes-allow-all.pkla:
and `/etc/polkit-1/localauthority/50-local.d/qubes-allow-all.pkla`:
[Qubes allow all]
Identity=*
@ -83,15 +83,15 @@ Below is a complete list of configuration made according to the above statement,
ResultInactive=yes
ResultActive=yes
- NetworkManager configuration from normal user (nm-applet)
- updates installation (gpk-update-viewer)
- user can use pkexec just like sudo Note: above is needed mostly because Qubes user GUI session isn't treated by PolicyKit/logind as "local" session because of the way in which X server and session is started.
- NetworkManager configuration from normal user (`nm-applet`).
- Updates installation (`gpk-update-viewer`).
- User can use pkexec just like sudo Note: above is needed mostly because Qubes user GUI session isn't treated by PolicyKit/logind as "local" session because of the way in which X server and session is started.
Perhaps we will address this issue in the future, but this is really low priority.
Patches welcomed anyway.
3. Empty root password
- used for access to 'root' account from text console (qvm-console-dispvm) - the only way to access the VM when GUI isn't working
- can be used for easy 'su -' from user to root
3. Empty root password:
- Used for access to 'root' account from text console (`qvm-console-dispvm`) - the only way to access the VM when GUI isn't working.
- Can be used for easy 'su -' from user to root.
Replacing passwordless root access with Dom0 user prompt
--------------------------------------------------------
@ -111,14 +111,14 @@ Do not rely on this for extra security.**
(Note: any VMs you would like still to have passwordless root access (e.g. TemplateVMs) can be specified in the second file with "\<vmname\> dom0 allow")
2. Configuring Fedora TemplateVM to prompt Dom0 for any authorization request:
- In /etc/pam.d/system-auth, replace all lines beginning with "auth" with these lines:
- In `/etc/pam.d/system-auth`, replace all lines beginning with "auth" with these lines:
auth [success=1 default=ignore] pam_exec.so seteuid /usr/lib/qubes/qrexec-client-vm dom0 qubes.VMAuth /bin/grep -q ^1$
auth requisite pam_deny.so
auth required pam_permit.so
- Require authentication for sudo.
Replace the first line of /etc/sudoers.d/qubes with:
Replace the first line of `/etc/sudoers.d/qubes` with:
user ALL=(ALL) ALL
@ -128,14 +128,14 @@ Do not rely on this for extra security.**
[root@fedora-20-x64]# rm /etc/polkit-1/localauthority/50-local.d/qubes-allow-all.pkla
3. Configuring Debian/Whonix TemplateVM to prompt Dom0 for any authorization request:
- In /etc/pam.d/common-auth, replace all lines beginning with "auth" with these lines:
- In `/etc/pam.d/common-auth`, replace all lines beginning with "auth" with these lines:
auth [success=1 default=ignore] pam_exec.so seteuid /usr/lib/qubes/qrexec-client-vm dom0 qubes.VMAuth /bin/grep -q ^1$
auth requisite pam_deny.so
auth required pam_permit.so
- Require authentication for sudo.
Replace the first line of /etc/sudoers.d/qubes with:
Replace the first line of `/etc/sudoers.d/qubes` with:
user ALL=(ALL) ALL
@ -144,11 +144,11 @@ Do not rely on this for extra security.**
[root@debian-8]# rm /etc/polkit-1/rules.d/00-qubes-allow-all.rules
[root@debian-8]# rm /etc/polkit-1/localauthority/50-local.d/qubes-allow-all.pkla
- In /etc/pam.d/su.qubes, comment out this line near the bottom of the file:
- In `/etc/pam.d/su.qubes`, comment out this line near the bottom of the file:
auth sufficient pam_permit.so
- For Whonix, if prompts appear during boot, create /etc/sudoers.d/zz99 and add these lines:
- For Whonix, if prompts appear during boot, create `/etc/sudoers.d/zz99` and add these lines:
ALL ALL=NOPASSWD: /usr/sbin/virt-what
ALL ALL=NOPASSWD: /usr/sbin/service whonixcheck restart