The SMTP service must not use .forward files.

From VMware vRealize Automation 7.x SLES Security Technical Implementation Guide

Associated with: CCI-000382

SV-100317r1_rule The SMTP service must not use .forward files.

Vulnerability discussion

The .forward file allows users to automatically forward mail to another system. Use of .forward files could allow the unauthorized forwarding of mail and could potentially create mail loops, which could degrade system performance.

Check content

Check if forwarding from sendmail: # grep "0 ForwardPath" /etc/sendmail.cf If the entry contains a file path and is not commented out, this is a finding.

Fix text

Disable forwarding for sendmail and remove ".forward" files from the system: Remove all .forward files on the system: # find / -name .forward -delete Use the following command to disable forwarding: # sed -i "s/O ForwardPath/#O ForwardPath/" /etc/sendmail.cf Restart the sendmail service: # service sendmail restart

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