STIGQter: STIG Summary: Red Hat Enterprise Linux 9 Security Technical Implementation Guide Version: 2 Release: 9 Benchmark Date: 01 Jul 2026:

RHEL 9 must have the s-nail package installed.

DISA Rule

SV-257842r1044916_rule

Vulnerability Number

V-257842

Group Title

SRG-OS-000363-GPOS-00150

Rule Version

RHEL-09-215095

Severity

CAT II

CCI(s)

• CCI-001744 - Implement organization-defined security responses automatically if baseline configurations are changed in an unauthorized manner.

Weight

10

Fix Recommendation

The s-nail package can be installed with the following command:

$ sudo dnf install s-nail

Check Contents

Verify that RHEL 9 is configured to allow sending email notifications.

Note: The "s-nail" package provides the "mail" command that is used to send email messages.

Verify that the "s-nail" package is installed on the system:

$ dnf list --installed s-nail

s-nail.x86_64 14.9.22-6.el9

If "s-nail" package is not installed, this is a finding.

Vulnerability Number

V-257842

Documentable

False

Rule Version

RHEL-09-215095

Severity Override Guidance

Verify that RHEL 9 is configured to allow sending email notifications.

Note: The "s-nail" package provides the "mail" command that is used to send email messages.

Verify that the "s-nail" package is installed on the system:

$ dnf list --installed s-nail

s-nail.x86_64 14.9.22-6.el9

If "s-nail" package is not installed, this is a finding.

Check Content Reference

M

Target Key

5551