Detections
Analytics
MTA Open Mail Relaying Allowed (thorough test)
high Nessus Plugin ID 11852
Language:
Synopsis
An open SMTP relay is running on the remote host.Description
Nessus has detected that the remote SMTP server is insufficiently protected against mail relaying. This issue allows any spammer to use your mail server to send their mail to the world, thus flooding your network bandwidth and possibly getting your mail server blacklisted.Solution
Reconfigure your SMTP server so that it cannot be used as an indiscriminate SMTP relay. Make sure that the server uses appropriate access controls to limit the extent to which relaying is possible.See Also
Plugin Details
Severity: High
ID: 11852
File Name: smtp_relay2.nasl
Version: 1.25
Type: remote
Family: SMTP problems
Published: 9/26/2003
Updated: 8/3/2018
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: High
Score: 7.4
CVSS v2
Risk Factor: High
Base Score: 7.8
Temporal Score: 6.6
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C
CVSS v3
Risk Factor: High
Base Score: 7.5
Temporal Score: 6.9
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:U/RL:X/RC:C
Vulnerability Information
Exploit Ease: No known exploits are available
Vulnerability Publication Date: 1/1/1990