STIGQter STIGQter: STIG Summary: Riverbed NetIM OS Security Technical Implementation Guide Version: 1 Release: 1 Benchmark Date: 11 Sep 2025:

Ubuntu OS must disable the x86 Ctrl-Alt-Delete key sequence.

DISA Rule

SV-275565r1147745_rule

Vulnerability Number

V-275565

Group Title

SRG-OS-000480-GPOS-00227

Rule Version

RIIM-OS-211015

Severity

CAT II

CCI(s)

Weight

10

Fix Recommendation

Configure Ubuntu OS to disable the Ctrl-Alt-Delete sequence for the command line by using the following commands:

$ sudo systemctl disable ctrl-alt-del.target

$ sudo systemctl mask ctrl-alt-del.target

Reload the daemon to take effect:

$ sudo systemctl daemon-reload

Check Contents

Verify Ubuntu OS is not configured to reboot the system when Ctrl-Alt-Delete is pressed by using the following command:

$ systemctl status ctrl-alt-del.target
ctrl-alt-del.target
Loaded: masked (Reason: Unit ctrl-alt-del.target is masked.)
Active: inactive (dead)

If the "ctrl-alt-del.target" is not masked, this is a finding.

Vulnerability Number

V-275565

Documentable

False

Rule Version

RIIM-OS-211015

Severity Override Guidance

Verify Ubuntu OS is not configured to reboot the system when Ctrl-Alt-Delete is pressed by using the following command:

$ systemctl status ctrl-alt-del.target
ctrl-alt-del.target
Loaded: masked (Reason: Unit ctrl-alt-del.target is masked.)
Active: inactive (dead)

If the "ctrl-alt-del.target" is not masked, this is a finding.

Check Content Reference

M

Target Key

5706