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The SMTP service HELP command must not be enabled.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-12006 | GEN004540 | SV-38885r1_rule | ECSC-1 | 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 |
|---|---|
| AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE | 2017-12-08 |
Details
| Check Text ( C-37886r1_chk ) |
|---|
| Check to see if help is disabled in Sendmail. Procedure: # telnet help If the help command returns any Sendmail version information, this is a finding. |
| Fix Text (F-31926r1_fix) |
|---|
| To disable the SMTP HELP command create an empty Sendmail help file. # > /etc/mail/help |