The SMTP service HELP command must not be enabled.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-12006 | GEN004540 | SV-37504r3_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 |
|---|---|
| Red Hat Enterprise Linux 5 Security Technical Implementation Guide | 2014-07-02 |
Details
| Check Text ( None ) |
|---|
| None |
| Fix Text (F-31413r2_fix) |
|---|
| To disable the SMTP HELP command, clear the Sendmail help file. # echo > /etc/mail/helpfile |