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V-239539

CAT II (Medium)

The SMTP service must not use .forward files.

Rule ID

SV-239539r662068_rule

STIG

VMware vRealize Operations Manager 6.x SLES Security Technical Implementation Guide

Version

V2R2

CCIs

CCI-000382

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 that could degrade system performance.

Check Content

Check 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