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The SMTP service HELP command must not be enabled.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-89663 | VRAU-SL-000610 | SV-100313r1_rule | Medium |
| Description |
|---|
| The HELP command should be disabled to mask version information. The version of the SMTP service software could be used by attackers to target vulnerabilities present in specific software versions. |
| STIG | Date |
|---|---|
| VMware vRealize Automation 7.x SLES Security Technical Implementation Guide | 2018-10-12 |
Details
| Check Text ( C-89355r1_chk ) |
|---|
| Check the permissions of the sendmail helpfile: ls -al /usr/lib/sendmail.d/helpfile If the permissions are not "0000", this is a finding. |
| Fix Text (F-96405r1_fix) |
|---|
| Run the following command to disable the sendmail helpfile: # chmod 0000 /usr/lib/sendmail.d/helpfile |