Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: shadow (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1872443
Title:
/etc/securetty missing: dovecot not working
Status in shadow package in Ubuntu:
Confirmed
Bug description:
With Ubuntu 20.04 Focal Fossa, /etc/securetty is missing from the
"login" package (4.8.1-1ubuntu4).
This leads to errors such as in /var/log/mail.log when a dovecot auth
is tried:
Apr 13 13:08:17 venus dovecot[10588]: imap-login: Login: user=<tttt>,
method=PLAIN,
rip=192.168.123.1, lip=192.168.123.188, mpid=12200, TLS, TLSv1.2 with cipher
ECDHE-E
CDSA-AES256-GCM-SHA384 (256/256 bits)
Apr 13 13:08:18 venus auth[12195]: pam_unix(dovecot:auth): Couldn't open
/etc/secure
tty: No such file or directory
Apr 13 13:08:18 venus auth[12195]: pam_unix(dovecot:auth): Couldn't open
/etc/secure
tty: No such file or directory
Apr 13 13:08:18 venus dovecot[10588]: imap-login: Login: user=<tttt>,
method=PLAIN,
rip=192.168.123.1, lip=192.168.123.188, mpid=12202, TLS, TLSv1.2 with cipher
ECDHE-E
CDSA-AES256-GCM-SHA384 (256/256 bits)
It seems that pam_unix still needs /etc/securetty, but login no longer
provides it.
There was a similar bug in debian that seems to be related:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=931899
To my understanding, this is a problem between pam and login packages
in 20.04.
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