STIGQter: STIG Summary: Tri-Lab Operating System Stack (TOSS) 4 Security Technical Implementation Guide Version: 2 Release: 6 Benchmark Date: 01 Jul 2026:

TOSS must disable the asynchronous transfer mode (ATM) protocol.

DISA Rule

SV-253074r958478_rule

Vulnerability Number

V-253074

Group Title

SRG-OS-000095-GPOS-00049

Rule Version

TOSS-04-040190

Severity

CAT II

CCI(s)

• CCI-000381 - Configure the system to provide only organization-defined mission essential capabilities.

Weight

10

Fix Recommendation

Configure the operating system to disable the ability to use the ATM protocol kernel module.

Add or update the following lines in the file "/etc/modprobe.d/blacklist.conf":

install atm /bin/false
blacklist atm

Reboot the system for the settings to take effect.

Check Contents

Verify the operating system disables the ability to load the ATM protocol kernel module.

$ sudo grep -r atm /etc/modprobe.d/* | grep install

install atm /bin/false

If the command does not return any output, or the line is commented out, and use of the ATM protocol is not documented with the Information System Security Officer (ISSO) as an operational requirement, this is a finding.

Verify the operating system disables the ability to use the ATM protocol.

Check to see if the ATM protocol is disabled with the following command:

$ sudo grep -r atm /etc/modprobe.d/* | grep "blacklist"

blacklist atm

If the command does not return any output or the output is not "blacklist atm", and use of the ATM protocol is not documented with the Information System Security Officer (ISSO) as an operational requirement, this is a finding.

Vulnerability Number

V-253074

Documentable

False

Rule Version

TOSS-04-040190

Severity Override Guidance

Verify the operating system disables the ability to load the ATM protocol kernel module.

$ sudo grep -r atm /etc/modprobe.d/* | grep install

install atm /bin/false

If the command does not return any output, or the line is commented out, and use of the ATM protocol is not documented with the Information System Security Officer (ISSO) as an operational requirement, this is a finding.

Verify the operating system disables the ability to use the ATM protocol.

Check to see if the ATM protocol is disabled with the following command:

$ sudo grep -r atm /etc/modprobe.d/* | grep "blacklist"

blacklist atm

If the command does not return any output or the output is not "blacklist atm", and use of the ATM protocol is not documented with the Information System Security Officer (ISSO) as an operational requirement, this is a finding.

Check Content Reference

M

Target Key

5469