| name | cis-ubuntu1804-v220-1-7-5 |
| description | Ensure permissions on /etc/issue are configured |
| category | cis-networking |
| version | 2.2.0 |
| author | cyberstrike-official |
| tags | ["cis","ubuntu","linux","ubuntu-18.04","issue","permissions","file-permissions"] |
| cis_id | 1.7.5 |
| cis_benchmark | CIS Ubuntu Linux 18.04 LTS Benchmark v2.2.0 |
| tech_stack | ["ubuntu","linux"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | {} |
1.7.5 Ensure permissions on /etc/issue are configured (Automated)
Profile Applicability
- Level 1 - Server
- Level 1 - Workstation
Description
The contents of the /etc/issue file are displayed to users prior to login for local terminals.
Rationale
If the /etc/issue file does not have the correct ownership it could be modified by unauthorized users with incorrect or misleading information.
Audit Procedure
Command Line
Run the following command and verify Access is 644 or more restrictive and Uid and Gid are both 0/root:
stat -Lc 'Access: (%#a/%A) Uid: ( %u/ %U) Gid: ( %g/ %G)' /etc/issue
Expected Result
Access: (0644/-rw-r--r--) Uid: ( 0/ root) Gid: ( 0/ root)
Remediation
Command Line
Run the following commands to set permissions on /etc/issue:
chown root:root $(readlink -e /etc/issue)
chmod u-x,go-wx $(readlink -e /etc/issue)
Default Value
Access: (0644/-rw-r--r--) Uid: ( 0/ root) Gid: ( 0/ root)
References
- NIST SP 800-53 Rev. 5: AC-3, MP-2
CIS Controls
| Controls Version | Control | IG 1 | IG 2 | IG 3 |
|---|
| v8 | 3.3 Configure Data Access Control Lists | X | X | X |
| v7 | 14.6 Protect Information through Access Control Lists | X | X | X |
MITRE ATT&CK Mappings
| Techniques / Sub-techniques | Tactics | Mitigations |
|---|
| T1222, T1222.002 | TA0005 | M1022 |