OL 8 must not have the asynchronous transfer mode (ATM) kernel module installed if not required for operational support.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-248829 | OL08-00-040021 | SV-248829r991589_rule | CCI-000366 | medium |
| Description | ||||
| The ATM is a transport layer protocol designed for digital transmission of multiple types of traffic, including telephony (voice), data, and video signals, in one network without the use of separate overlay networks. Disabling ATM protects the system against exploitation of any flaws in its implementation. | ||||
| STIG | Date | |||
| Oracle Linux 8 Security Technical Implementation Guide | 2025-05-13 | |||
Related Frameworks
4 paths across 3 frameworks
Related Frameworks
NIST 800-531 mapping
CM-6
1.00
- DISA · 2 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
NIST 800-1712 mappings
3.4.1
1.00
- DISA · 2 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
- NIST · Rev 2 (Feb 2020, errata Jan 2021) · nist_800_171_app_d · equivalent
3.4.2
1.00
- DISA · 2 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
- NIST · Rev 2 (Feb 2020, errata Jan 2021) · nist_800_171_app_d · equivalent
CCI1 mapping
CCI-000366
1.00
- DISA · 2 · disa_xccdf · related
Details
Check Text (C-248829r991589_chk)
Verify the operating system disables the ability to load the "atm" kernel module.
$ sudo grep -r atm /etc/modprobe.d/* | grep -i "/bin/false" | grep -v "^#"
install atm /bin/false
If the command does not return any output or the line is commented out, and use of ATM 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 ATM with the following command:
$ sudo grep atm /etc/modprobe.d/* | grep -i "blacklist" | grep -v "^#"
blacklist atm
If the command does not return any output or the output is not "blacklist atm", and use of ATM is not documented with the ISSO as an operational requirement, this is a finding.
Fix Text (F-52217r943070_fix)
Configure OL 8 to disable the ability to use the "atm" kernel module.
Create a file under "/etc/modprobe.d" with the following command:
$ sudo touch /etc/modprobe.d/atm.conf
Add the following line to the created file:
install atm /bin/false
Configure OL 8 to disable the ability to use the atm kernel module.
$ sudo vi /etc/modprobe.d/blacklist.conf
Add or update the line:
blacklist atm