Public bug reported:
the purpose of my “check password script” is, amongst others, to check
if a new password contains relevant portions of the username. Therefore,
it is called like this from smb.conf:
check password script = /usr/local/sbin/checkpw.sh %U
I did expect it to pass the username to the script.
But most of the times, the script receives not the username, but the
computer account name of the specific user, or even nothing at all.
I verified this by logging what the script gets:
username=$1
log "user $username initiated password change"
and this is the result:
/var/log/syslog:Nov 4 08:07:57 <hostname> checkpasswd: user <client hostname>
initiated password change
/var/log/syslog:Nov 4 08:35:53 <server hostname> checkpasswd: user <client
hostname> initiated password change
/var/log/syslog:Nov 4 08:37:35 <server hostname> checkpasswd: user <client
hostname> initiated password change
/var/log/syslog:Nov 4 08:56:49 <server hostname> checkpasswd: user <empty>
initiated password change
/var/log/syslog:Nov 4 08:56:49 <server hostname> checkpasswd: ERR complexity
score not met (2/3)
/var/log/syslog:Nov 4 08:57:51 <server hostname> checkpasswd: user <empty>
initiated password change
/var/log/syslog:Nov 4 08:58:30 <server hostname> checkpasswd: user <empty>
initiated password change
/var/log/syslog:Nov 4 09:23:49 <server hostname> checkpasswd: user <empty>
initiated password change
/var/log/syslog:Nov 4 09:24:44 <server hostname> checkpasswd: user <client
hostname> initiated password change
/var/log/syslog:Nov 4 09:24:44 <server hostname> checkpasswd: ERR complexity
score not met (2/3)
/var/log/syslog:Nov 4 09:26:01 <server hostname> checkpasswd: user <client
hostname> initiated password change
** Affects: samba (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/886048
Title:
“check password script” option does not reliably pass parameters
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