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 software packages originating from external software repositories before installation.

DISA Rule

SV-282583r1200729_rule

Vulnerability Number

V-282583

Group Title

SRG-OS-000366-GPOS-00153

Rule Version

TOSS-05-000116

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 software packages originating from external software repositories before installation.

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

gpgcheck=1

Check Contents

Verify dnf always checks the GPG signature of software packages originating from external software repositories before installation:

$ grep gpgcheck /etc/dnf/dnf.conf

gpgcheck=1

If "gpgcheck" is not set to "1", or if the option is missing or commented out, ask the system administrator how the GPG signatures of 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-282583

Documentable

False

Rule Version

TOSS-05-000116

Severity Override Guidance

Verify dnf always checks the GPG signature of software packages originating from external software repositories before installation:

$ grep gpgcheck /etc/dnf/dnf.conf

gpgcheck=1

If "gpgcheck" is not set to "1", or if the option is missing or commented out, ask the system administrator how the GPG signatures of 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