sudo is no longer owned by root so it no longer works

[scottfk]

sudo is no longer owned by root, so it no longer works:

$ sudo dmesg
sudo: /usr/bin/sudo must be owned by uid 0 and have the setuid bit set

$ ls -l `which sudo`
-rwsr-xr-x 1 2001 2501 190952 Feb 10 12:42 /usr/bin/sudo

ProblemType: Bug
DistroRelease: Ubuntu 21.04
Package: sudo 1.9.5p2-2ubuntu1
ProcVersionSignature: Ubuntu 5.10.0-14.15-generic 5.10.11
Uname: Linux 5.10.0-14-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu58
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: Budgie:GNOME
Date: Tue Feb 16 09:55:07 2021
InstallationDate: Installed on 2018-07-25 (936 days ago)
InstallationMedia: Ubuntu-Budgie 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
RebootRequiredPkgs:
 gnome-shell
 zfs-dkms
 zfs-dkms
SourcePackage: sudo
UpgradeStatus: Upgraded to hirsute on 2020-10-31 (107 days ago)
VisudoCheck:
 /etc/sudoers: parsed OK
 /etc/sudoers.d/README: parsed OK
 /etc/sudoers.d/zfs: parsed OK
modified.conffile..etc.sudoers: [inaccessible: [Errno 13] Permission denied: '/etc/sudoers']
modified.conffile..etc.sudoers.d.README: [inaccessible: [Errno 13] Permission denied: '/etc/sudoers.d/README']