Cis Ubuntu2004 V300 1 1 2 7 2

Ensure nodev option set on /var/log/audit partition

Profile

Level 1 - Server, Level 1 - Workstation, Assessment: Automated

Description

The nodev mount option specifies that the filesystem cannot contain special devices.

Rationale

Since the /var/log/audit filesystem is not intended to support devices, set this option to ensure that users cannot create a block or character special devices in /var/log/audit.

Audit Procedure

Command Line

• IF - a separate partition exists for /var/log/audit, verify that the nodev option is set. Run the following command to verify that the nodev mount option is set. Example:

# findmnt -kn /var/log/audit | grep -v nodev

Nothing should be returned

Expected Result

Nothing should be returned

Remediation

Command Line

• IF - a separate partition exists for /var/log/audit. Edit the /etc/fstab file and add nodev to the fourth field (mounting options) for the /var/log/audit partition. Example:

<device> /var/log/audit   <fstype>   defaults,rw,nosuid,nodev,noexec,relatime   0 0

Run the following command to remount /var/log/audit with the configured options:

# mount -o remount /var/log/audit

Default Value

Not configured by default.

References

1. See the fstab(5) manual page for more information.
2. NIST SP 800-53 Revision 5 :: CM-7 (2)
3. STIG ID: RHEL-08-040129 | RULE ID: SV-230517r958804 | CAT II
4. STIG ID: RHEL-09-231175 | RULE ID: SV-257876r958804 | CAT II
5. STIG ID: ALMA-09-027190 | RULE ID: SV-269320r1050202 | CAT II

CIS Controls

v8 - 3.3 Configure Data Access Control Lists (IG 1, IG 2, IG 3) v7 - 14.6 Protect Information through Access Control Lists (IG 1, IG 2, IG 3)

MITRE ATT&CK Mappings: T1200, T1200.000 | TA0005 | M1022