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Showing SKILL.md
| name | cis-ubuntu1804-v220-6-1-3 |
| description | Ensure permissions on /etc/group are configured |
| category | cis-iam |
| version | 2.2.0 |
| author | cyberstrike-official |
| tags | ["cis","ubuntu","linux","ubuntu-18.04","file-permissions"] |
| cis_id | 6.1.3 |
| cis_benchmark | CIS Ubuntu Linux 18.04 LTS Benchmark v2.2.0 |
| tech_stack | ["ubuntu","linux"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | {} |
The /etc/group file contains a list of all the valid groups defined in the system. The command below allows read/write access for root and read access for everyone else.
The /etc/group file needs to be protected from unauthorized changes by non-privileged users, but needs to be readable as this information is used with many non-privileged programs.
Run the following command to verify /etc/group is mode 644 or more restrictive, Uid is 0/root and Gid is 0/root:
# stat -Lc 'Access: (%#a/%A) Uid: ( %u/ %U) Gid: ( %g/ %G)' /etc/group
Access: (0644/-rw-r--r--) Uid: ( 0/ root) Gid: ( 0/ root)
Run the following commands to remove excess permissions, set owner, and set group on /etc/group:
# chmod u-x,go-wx /etc/group
# chown root:root /etc/group
Access: (0644/-rw-r--r--) Uid: ( 0/ root) Gid: ( 0/ root)