[Pkg-shadow-devel] Bug#1021745: passwd: /etc/passwd was edited with the wrong shell path

[Najib B]

Package: passwd
Version: 1:4.12.3+dfsg1-1
Severity: important
X-Debbugs-Cc: najibbakari at gmail.com

Dear Maintainer,

I have just noticed this issue on chsh that I would like to report to you,
including a solution that I would like to mention.

----------------------
# chsh
Changing the login shell for root
Enter the new value, or press ENTER for the default
Login Shell [/bin/zsh]: zsh
chsh: Warning: zsh does not exist

exit
$ sudo chsh
Password:
chsh: PAM: Authentication failure`
-----------------------
The problem here, is that chsh has accepted "zsh" without checking first, if
that path exists.

After exiting "root" it is not possible to login back.
The solution is to edit /etc/passwd from this:
root:x:0:0:root:/root:zsh
to this:
root:x:0:0:root:/root:/bin/zsh

Best regards,


-- System Information:
Distributor ID:	Kali
Description:	Kali GNU/Linux Rolling
Release:	2022.3
Codename:	kali-rolling
Architecture: x86_64

Kernel: Linux 5.18.0-kali7-amd64 (SMP w/3 CPU threads; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages passwd depends on:
ii  libaudit1       1:3.0.7-1.1
ii  libc6           2.34-4
ii  libcrypt1       1:4.4.28-2
ii  libpam-modules  1.5.2-5
ii  libpam0g        1.5.2-5
ii  libselinux1     3.4-1+b2
ii  libsemanage2    3.4-1+b2

Versions of packages passwd recommends:
ii  sensible-utils  0.0.17

passwd suggests no packages.

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