The SMTP service HELP command must not be enabled.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-12006	GEN004540	SV-35059r2_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
HP-UX 11.31 Security Technical Implementation Guide	2018-09-14

Details

Check Text ( C-36569r2_chk )
Verify that the Help command is disabled in Sendmail: # ls -al /etc/mail/helpfile If the file does not exist, this is not a finding. If the help file does exist, verify that the file is empty: # cat /etc/mail/helpfile If the help file is not empty, this is a finding.

Fix Text (F-11266r3_fix)
To disable the SMTP HELP command, remove or empty the Sendmail help file: /etc/mail/helpfile.