The SUSE operating system SSH daemon public host key files must have mode 0644 or less permissive.

From SLES 12 Security Technical Implementation Guide

Associated with: CCI-000366

SV-92159r2_rule The SUSE operating system SSH daemon public host key files must have mode 0644 or less permissive.

Vulnerability discussion

If a public host key file is modified by an unauthorized user, the SSH service may be compromised.

Check content

Verify the SUSE operating system SSH daemon public host key files have mode "0644" or less permissive. Note: SSH public key files may be found in other directories on the system depending on the installation. The following command will find all SSH public key files on the system: # sudo find /etc/ssh -name '*.pub' -exec ls -lL {} \; -rw-r--r-- 1 root wheel 618 Nov 28 06:43 ssh_host_dsa_key.pub -rw-r--r-- 1 root wheel 347 Nov 28 06:43 ssh_host_key.pub -rw-r--r-- 1 root wheel 238 Nov 28 06:43 ssh_host_rsa_key.pub If any file has a mode more permissive than "0644", this is a finding.

Fix text

Configure the SUSE operating system SSH daemon public host key files have mode "0644" or less permissive. Note: SSH public key files may be found in other directories on the system depending on the installation. Change the mode of public host key files under "/etc/ssh" to "0644" with the following command: # chmod 0644 /etc/ssh/*.key.pub

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