The SMTP service must not use .forward files.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-239539 | VROM-SL-000600 | SV-239539r662068_rule | Medium |
| Description |
|---|
| 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. |
| STIG | Date |
|---|---|
| VMware vRealize Operations Manager 6.x SLES Security Technical Implementation Guide | 2021-07-01 |
Details
| Check Text ( C-42772r662066_chk ) |
|---|
| 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 (F-42731r662067_fix) |
|---|
| 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 |