MS SMTP NULL Session Mail Relay

Medium Nessus Network Monitor Plugin ID 2040

Synopsis

The remote SMTP server may be inappropriately used as a relay.

Description

It is possible to authenticate to the remote SMTP service by logging in as a NULL session. An attacker may exploit this flaw to use your SMTP server as a spam relay.

Solution

Upgrade or patch according to vendor recommendations.

See Also

http://www.microsoft.com/technet/security/bulletin/MS02-011.asp

Plugin Details

Severity: Medium

ID: 2040

Family: SMTP Servers

Published: 2004/08/18

Modified: 2016/02/05

Dependencies: 2004, 2005

Nessus ID: 11308

Risk Information

Risk Factor: Medium

CVSSv2

Base Score: 6.4

Temporal Score: 4.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:P

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSSv3

Base Score: 6.4

Temporal Score: 5.5

Vector: CVSS3#AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Temporal Vector: CVSS3#E:U/RL:O/RC:C

Reference Information

CVE: CVE-2002-0054

BID: 4205