To reproduce:
apt install libpam-passwdqc
sed -i -e 's/\(pam_passwdqc.so\)/\1 ask_oldauthtok/'
/etc/pam.d/common-password
echo 'root:hearth=mirth-Double' | chpasswd
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https://bugs.launchpad.net/bugs/1904166
Title:
chpasswd can't change password with libpam-passwdqc enabled
Status in shadow package in Ubuntu:
New
Bug description:
Hello.
We are unable to change user password using chpasswd with libpam-
passwdqc, it seems to miss detect old password:
root@server:~# echo 'root:hearth=mirth-Double' | chpasswd
[…]
Weak password: is the same as the old one.
Try again.
root@server:~# echo $?
1
I tried the following to make sure the old password was not the same:
root@server:~# echo 'root:foo' | chpasswd -c SHA512
root@server:~# echo 'root:hearth=mirth-Double' | chpasswd
[…]
Weak password: is the same as the old one.
Try again.
root@server:~# echo $?
1
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