SMTP Service Cleartext Login Permitted

This script is Copyright (C) 2011-2015 Tenable Network Security, Inc.


Synopsis :

The remote mail server allows cleartext logins.

Description :

The remote host is running an SMTP server that advertises that it
allows cleartext logins over unencrypted connections. An attacker may
be able to uncover user names and passwords by sniffing traffic to the
server if a less secure authentication mechanism (i.e. LOGIN or
PLAIN) is used.

See also :

http://tools.ietf.org/html/rfc4422
http://tools.ietf.org/html/rfc4954

Solution :

Configure the service to support less secure authentication
mechanisms only over an encrypted channel.

Risk factor :

Low / CVSS Base Score : 2.6
(CVSS2#AV:N/AC:H/Au:N/C:P/I:N/A:N)

Family: SMTP problems

Nessus Plugin ID: 54582 ()

Bugtraq ID:

CVE ID:

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