cyberstrikeus CIS Ubuntu Linux 16.04 LTS Benchmark v2.0.0 - Control 5.3.1
Description
The /etc/ssh/sshd_config file contains configuration specifications for sshd. The command below sets the owner and group of the file to root.
Rationale
The /etc/ssh/sshd_config file needs to be protected from unauthorized changes by non-privileged users.
Audit Procedure
Command Line
Run the following command and verify Uid and Gid are both 0/root and Access does not grant permissions to group or other:
stat /etc/ssh/sshd_config
Expected Result
Access: (0600/-rw-------) Uid: ( 0/ root) Gid: ( 0/ root)
Remediation
Command Line
Run the following commands to set ownership and permissions on /etc/ssh/sshd_config:
chown root:root /etc/ssh/sshd_config
chmod og-rwx /etc/ssh/sshd_config
Default Value
Access: (0600/-rw-------) Uid: ( 0/ root) Gid: ( 0/ root)
References
- SSHD_CONFIG(5)
CIS Controls
Version 7
14.6 Protect Information through Access Control Lists - Protect all information stored on systems with file system, network share, claims, application, or database specific access control lists. These controls will enforce the principle that only authorized individuals should have access to the information based on their need to access the information as a part of their responsibilities.
Profile Applicability
- Level 1 - Server
- Level 1 - Workstation
Assessment Status
Automated