Ok, there’s an inconsistency then.  The DISA STIG says that the private keys need to be 0600.  Looks like they set permissions to the DISA version of the rule, but are scanning the SSG version of the rule.


Can you provide a “proof of concept” that shows the key generation failing if the permissions are set to 0600 so I have something in my back pocket to show our customer?


Tom A.


From: Gabe Alford <redhatrises@gmail.com>
Sent: Thursday, September 20, 2018 10:44 AM
To: SCAP Security Guide <scap-security-guide@lists.fedorahosted.org>
Subject: EXTERNAL: Re: False positive message for sshd key file permission


The scan fails because permissions should be 0640 for the private key. If they are not set to 0640, this prevents sshd from generating keys.


On Thu, Sep 20, 2018 at 8:40 AM, Dushyant Uge <duge@redhat.com> wrote:

Hello Team,


One of our customer raised concern  that --

The rule going wrong are:


On the customer's system, the correct permissions seen --

Red Hat Enterprise Linux Server release 7.5 (Maipo)




-    640 for public key files (*.pub)
-    600 for private key files (*_key)

Output of ls –l /etc/ssh
-rw-r--r--. 1 root root     581843 Nov 24  2017 moduli
-rw-r--r--. 1 root root       2276 Nov 24  2017 ssh_config
-rw-------. 1 root root       4026 Sep  4 14:20 sshd_config
-rw-------. 1 root ssh_keys    241 Sep  4 14:20 ssh_host_ecdsa_key
-rw-r--r--. 1 root root        162 Sep  4 14:20 ssh_host_ecdsa_key.pub
-rw-------. 1 root ssh_keys   1704 Sep  4 14:20 ssh_host_rsa_key
-rw-r--r--. 1 root root        382 Sep  4 14:20 ssh_host_rsa_key.pub
-rw-r--r--. 1 root root       2548 Sep  4 14:20 ssh_known_hosts


Please find attached screenshot and suggest.



Warm Regards,

Dushyant Uge

Red Hat Global Support

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