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Showing SKILL.md
| name | cis-ubuntu1804-v220-1-1-5-1 |
| description | Ensure separate partition exists for /var/log |
| category | cis-storage |
| version | 2.2.0 |
| author | cyberstrike-official |
| tags | ["cis","ubuntu","linux","ubuntu-18.04","partition","var-log","mount","logging"] |
| cis_id | 1.1.5.1 |
| cis_benchmark | CIS Ubuntu Linux 18.04 LTS Benchmark v2.2.0 |
| tech_stack | ["ubuntu","linux"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | {} |
Level 2 - Server / Level 2 - Workstation, Assessment: Automated
The /var/log directory is used by system services to store log data.
There are two important reasons to ensure that system logs are stored on a separate partition: protection against resource exhaustion (since logs can grow quite large) and protection of audit data.
Resizing filesystems is a common activity in cloud-hosted servers. Separate filesystem partitions may prevent tying the overall disk management to one large volume. It may be necessary to use Logical Volume Management (LVM) or similar tools to create a flexible partitioning scheme for /var/log.
Run the following command and verify the output shows that /var/log is mounted:
# findmnt -kn /var/log
/var/log /dev/sda4 ext4 rw,nosuid,nodev,noexec,relatime
For specific configuration requirements of the /var/log mount for your environment, modify /etc/fstab:
# Configure /etc/fstab as appropriate:
# Example:
# <device> /var/log <fstype> defaults,rw,nosuid,nodev,noexec,relatime 0 0
Creating a new partition is a destructive operation that typically requires a reinstallation or use of LVM.
By default /var/log is not a separate partition.
v8 - 8.3 Ensure Adequate Audit Log Storage (IG 1, IG 2, IG 3) v7 - 6.4 Ensure adequate storage for logs (IG 2, IG 3)
MITRE ATT&CK Mappings: T1499, T1499.001 (TA0005) - M1022