Password mismatch after upgrade to Ubuntu Focal

Hi!

Today I upgraded one of our Dovecot servers from Ubuntu 18.04 to Ubuntu 20.04. After the upgrade I have login issues because the password didn't match.

I also installed Dovecot on a clean Ubuntu 20.04 server with the same configuration files. And here I also got the password match issue.

We're using LDAP for managing the login credentials and I'm 100% sure the password is correct. With the debug options on, you will see something like this:

CRYPT() != '$6$'

Does somebody know if there are know issues with Dovecot 2.3.7.2- 1ubuntu3.1 on Ubuntu 20.04 and with the LDAP driver?

dovecot -n

# 2.3.7.2 (3c910f64b): /etc/dovecot/dovecot.conf # Pigeonhole version 0.5.7.2 () # OS: Linux 5.4.0-33-generic x86_64 Ubuntu 20.04 LTS ceph # Hostname: server.example.tld auth_verbose = yes disable_plaintext_auth = no listen = *, [::] log_timestamp = "%Y-%m-%d %H:%M:%S " login_greeting = POP/IMAP Service ready. mail_fsync = always mail_location = maildir:/mail/%u mail_privileged_group = mail passdb { args = /etc/dovecot/dovecot-ldap.conf driver = ldap } plugin { acl = vfile:/etc/dovecot/acls/:cache_secs=30 autosubscribe = Trash autosubscribe2 = Sent autosubscribe3 = Drafts } protocols = imap pop3 service auth { user = root } service imap-create-folder { executable = script-login /usr/local/sbin/dovecot-create-dirs.sh } service imap-login { process_min_avail = 15 service_count = 0 } service imap { executable = imap imap-create-folder } service pop3-login { process_min_avail = 15 service_count = 0 } service pop3 { drop_priv_before_exec = yes } ssl = no userdb { driver = prefetch } protocol imap { mail_max_userip_connections = 25 mail_plugins = acl } protocol pop3 { pop3_uidl_format = %f }

/etc/dovecot/dovecot-ldap.conf

hosts = ldap.server.example.tld

dn = <XXXXX> dnpass = <XXXXX> auth_bind = no ldap_version = 3 base = <XXXXX>

pass_attrs = <XXXXX> pass_filter = <XXXXX>

Thanks!

Jeffrey