STIGQter: STIG Summary: Tri-Lab Operating System Stack (TOSS) 5 Security Technical Implementation Guide Version: 1 Release: 1 Benchmark Date: 26 Mar 2026:

TOSS 5 must check the GPG signature of locally installed software packages before installation.

DISA Rule

SV-282584r1200732_rule

Vulnerability Number

V-282584

Group Title

SRG-OS-000366-GPOS-00153

Rule Version

TOSS-05-000117

Severity

CAT I

CCI(s)

• CCI-003992 - Prevent the installation of organization-defined software and firmware components without verification that the component has been digitally signed using a certificate that is recognized and approved by the organization.

Weight

10

Fix Recommendation

Configure dnf to always check the GPG signature of local software packages before installation.

Add or update the following line in the [main] section of the /etc/dnf/dnf.conf :

localpkg_gpgcheck=1

Check Contents

Verify dnf always checks the GPG signature of locally installed software packages before installation:

$ grep localpkg_gpgcheck /etc/dnf/dnf.conf

localpkg_gpgcheck=1

If "localpkg_gpgcheck" is not set to "1", or if the option is missing or commented out, ask the system administrator how the GPG signatures of local software packages are verified.

If there is no process to verify GPG signatures that is approved by the organization, this is a finding.

Vulnerability Number

V-282584

Documentable

False

Rule Version

TOSS-05-000117

Severity Override Guidance

Verify dnf always checks the GPG signature of locally installed software packages before installation:

$ grep localpkg_gpgcheck /etc/dnf/dnf.conf

localpkg_gpgcheck=1

If "localpkg_gpgcheck" is not set to "1", or if the option is missing or commented out, ask the system administrator how the GPG signatures of local software packages are verified.

If there is no process to verify GPG signatures that is approved by the organization, this is a finding.

Check Content Reference

M

Target Key

5738