RHEL 10 must not have the "gdm" package installed.

STIG ID: RHEL-10-200080  |  SRG: SRG-OS-000095-GPOS-00049 |  Severity: medium (CAT II)  |  CCI: CCI-000381 |  Vulnerability Id: V-280950

Vulnerability Discussion

Unnecessary service packages must not be installed to decrease the attack surface of the system. A graphical environment is unnecessary for certain types of systems including a virtualization hypervisor.

Check

Verify RHEL 10 does not have the "gdm" package installed with the following command:

$ sudo dnf list --installed gdm
Error: No matching Packages to list

If the "gdm" package is installed and the need for a GUI interface has not been documented with the information system security officer, this is a finding.

Fix

Configure RHEL 10 to not have the "gdm" package installed with the following command:

$ sudo dnf -y remove gdm
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