[Bug 1823202] Re: HOME points to something not owned by user in sudo

[Dan Streetman]

*** This bug is a duplicate of bug 1556302 ***
    https://bugs.launchpad.net/bugs/1556302

** This bug is no longer a duplicate of bug 889936
   sudo(8) incorrectly says HOME is reset if env_reset is set
** This bug has been marked a duplicate of bug 1556302
   Ubuntu patch to add HOME to env_keep makes custom commands vulnerable by default

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Title:
  HOME points to something not owned by user in sudo

Status in sudo package in Ubuntu:
  New
Status in zsh package in Ubuntu:
  New

Bug description:
  <CcxWrk> You shouldn't use interactive shell, or any program with
  executable configuration, while your HOME points to something not
  owned by your user. That's the big issue and it's with sudo, not zsh,
  not omz, not any other shell or application you launch. <CcxWrk> You
  can go shout "you are doing security wrong" at Ubuntu. Good luck.

  ╭─rkm at Khadas ~  
  ╰─➤  id rkm && getent passwd rkm
  uid=1001(rkm) gid=1001(rkm) groups=1001(rkm),0(root),4(adm),5(tty),6(disk),20(dialout),21(fax),24(cdrom),25(floppy),26(tape),27(sudo),29(audio),30(dip),44(video),46(plugdev),50(staff),60(games),100(users),101(systemd-journal),104(input),108(netdev),112(bluetooth),113(lpadmin),121(pulse-access)
  rkm:x:1001:1001:Ryan McKee,,,,:/home/rkm:/usr/bin/zsh

  ╭─rkm at Khadas ~  
  ╰─➤  sudo /usr/bin/env                                                      1 ↵
  LC_MESSAGES=en_US.UTF-8
  LANG=en_US.UTF-8
  LANGUAGE=en_US.UTF-8
  TERM=xterm-256color
  XAUTHORITY=/home/rkm/.Xauthority
  COLORTERM=truecolor
  DISPLAY=:0.0
  PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin
  HOME=/home/rkm
  LC_CTYPE=en_US.UTF-8
  LS_COLORS=rs=0:di=01;34:ln=01;36:mh=00:pi=40;33:so=01;35:do=01;35:bd=40;33;01:cd=40;33;01:or=40;31;01:mi=00:su=37;41:sg=30;43:ca=30;41:tw=30;42:ow=34;42:st=37;44:ex=01;32:*.tar=01;31:*.tgz=01;31:*.arc=01;31:*.arj=01;31:*.taz=01;31:*.lha=01;31:*.lz4=01;31:*.lzh=01;31:*.lzma=01;31:*.tlz=01;31:*.txz=01;31:*.tzo=01;31:*.t7z=01;31:*.zip=01;31:*.z=01;31:*.Z=01;31:*.dz=01;31:*.gz=01;31:*.lrz=01;31:*.lz=01;31:*.lzo=01;31:*.xz=01;31:*.zst=01;31:*.tzst=01;31:*.bz2=01;31:*.bz=01;31:*.tbz=01;31:*.tbz2=01;31:*.tz=01;31:*.deb=01;31:*.rpm=01;31:*.jar=01;31:*.war=01;31:*.ear=01;31:*.sar=01;31:*.rar=01;31:*.alz=01;31:*.ace=01;31:*.zoo=01;31:*.cpio=01;31:*.7z=01;31:*.rz=01;31:*.cab=01;31:*.wim=01;31:*.swm=01;31:*.dwm=01;31:*.esd=01;31:*.jpg=01;35:*.jpeg=01;35:*.mjpg=01;35:*.mjpeg=01;35:*.gif=01;35:*.bmp=01;35:*.pbm=01;35:*.pgm=01;35:*.ppm=01;35:*.tga=01;35:*.xbm=01;35:*.xpm=01;35:*.tif=01;35:*.tiff=01;35:*.png=01;35:*.svg=01;35:*.svgz=01;35:*.mng=01;35:*.pcx=01;35:*.mov=01;35:*.mpg=01;35:*.mpeg=01;35:*.m2v=01;35:*.mkv=01;35:*.webm=01;35:*.ogm=01;35:*.mp4=01;35:*.m4v=01;35:*.mp4v=01;35:*.vob=01;35:*.qt=01;35:*.nuv=01;35:*.wmv=01;35:*.asf=01;35:*.rm=01;35:*.rmvb=01;35:*.flc=01;35:*.avi=01;35:*.fli=01;35:*.flv=01;35:*.gl=01;35:*.dl=01;35:*.xcf=01;35:*.xwd=01;35:*.yuv=01;35:*.cgm=01;35:*.emf=01;35:*.ogv=01;35:*.ogx=01;35:*.aac=00;36:*.au=00;36:*.flac=00;36:*.m4a=00;36:*.mid=00;36:*.midi=00;36:*.mka=00;36:*.mp3=00;36:*.mpc=00;36:*.ogg=00;36:*.ra=00;36:*.wav=00;36:*.oga=00;36:*.opus=00;36:*.spx=00;36:*.xspf=00;36:
  MAIL=/var/mail/root
  LOGNAME=root
  USER=root
  USERNAME=root
  SHELL=/bin/bash
  SUDO_COMMAND=/usr/bin/env

  
  SUDO_USER=rkm
  SUDO_UID=1001
  SUDO_GID=1001
  ╭─rkm at Khadas ~  
  ╰─➤  

  <Eickmeyer> CyberManifest: sudo is a package. Also, once filed, add
  zsh to the bug since it could be a bug in zsh's package as well.

  <Eickmeyer> Not necessarily zsh itself, but the packaging.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: sudo 1.8.21p2-3ubuntu1
  Uname: Linux 4.9.40 aarch64
  ApportVersion: 2.20.9-0ubuntu7.6
  Architecture: arm64
  CurrentDesktop: XFCE
  Date: Thu Apr  4 11:07:42 2019
  SourcePackage: sudo
  UpgradeStatus: No upgrade log present (probably fresh install)
  VisudoCheck:
   /etc/sudoers: parsed OK
   /etc/sudoers.d/README: parsed OK

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