Gordon,
Not an offending one. But the debug log is neither extensive nor surprising.
I have a little python attempting a root login with empty password:
import smtplib
hostname = 'mail.balclutha.org'
print "constructing SMTP..."
server = smtplib.SMTP(hostname)
print "setting debug level..."
server.set_debuglevel(1)
print "starting tls..."
server.starttls()
print "attempting login..."
server.login('root', '')
Jun 16 18:34:07 gimp authdaemond: received auth request, service=esmtp,
authtype=login
Jun 16 18:34:07 gimp authdaemond: authpam: trying this module
Jun 16 18:34:07 gimp authdaemond: incomplete username or missing password
Jun 16 18:34:07 gimp authdaemond: authpam: REJECT - try next module
Jun 16 18:34:07 gimp authdaemond: authldap: trying this module
Jun 16 18:34:07 gimp authdaemond: incomplete authentication data
Jun 16 18:34:07 gimp authdaemond: authldap: REJECT - try next module
Jun 16 18:34:07 gimp authdaemond: FAIL, all modules rejected
This empty password would appear to have *always* been an impossible vector of
attack - I don't even think it's bothering to call any underlying PAM modules.
If I attempt with a crapulous password (and given there's none set - what else
could it be...):
Jun 16 18:42:36 gimp authdaemond: authpam: trying this module
Jun 16 18:42:36 gimp authdaemond: authpam: sysusername=root, sysuserid=<null>,
sysgroupid=0, homedir=/root, address=root, fullname=root, maildir=<null>,
quota=<null>, options=<null>
Jun 16 18:42:36 gimp authdaemond: pam_service=esmtp, pam_username=root
Jun 16 18:42:39 gimp authdaemond: pam_authenticate failed, result 7
Jun 16 18:42:39 gimp authdaemond: authpam: REJECT - try next module
Jun 16 18:42:39 gimp authdaemond: authldap: trying this module
Jun 16 18:42:39 gimp authdaemond: using search filter: (mail=root)
Jun 16 18:42:39 gimp authdaemond: number of entries returned: 0 (but we need
exactly 1)
Jun 16 18:42:39 gimp authdaemond: authldap: REJECT - try next module
Jun 16 18:42:39 gimp authdaemond: FAIL, all modules rejected
Jun 16 18:42:39 gimp courieresmtpd: error,relay=::ffff:121.44.92.142,msg="535
Authentication failed.",cmd: AUTH PLAIN AHJvb3QAYmxhYmxh root
I'm quite perplexed to understand how root could possibly inject mail messages
from an external IP.
Alan
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