Guide to the Secure Configuration of Ubuntu 20.04
Rules, Groups, and Values defined within the XCCDF Benchmark
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Verify All Account Password Hashes are Shadowed
If any password hashes are stored in <code>/etc/passwd</code> (in the second field, instead of an <code>x</code> or <code>*</code>), the cause of t...Rule Medium Severity -
Verify All Account Password Hashes are Shadowed with SHA512
Verify the operating system requires the shadow password suite configuration be set to encrypt interactive user passwords using a strong cryptograp...Rule Medium Severity -
Ensure all users last password change date is in the past
All users should have a password change date in the past.Rule Medium Severity -
Ensure sudo group has only necessary members
Developers and implementers can increase the assurance in security functions by employing well-defined security policy models; structured, discipli...Rule Medium Severity -
All GIDs referenced in /etc/passwd must be defined in /etc/group
Add a group to the system for each GID referenced without a corresponding group.Rule Low Severity -
Ensure no duplicate UIDs exist
Although the useradd program will not let you create a duplicate User ID (UID), it is possible for an administrator to manually edit the /etc/passw...Rule Medium Severity -
All Interactive User Home Directories Must Have mode 0750 Or Less Permissive
Change the mode of interactive users home directories to <code>0750</code>. To change the mode of interactive users home directory, use the followi...Rule Medium Severity -
Ensure There Are No Accounts With Blank or Null Passwords
Check the "/etc/shadow" file for blank passwords with the following command: <pre>$ sudo awk -F: '!$2 {print $1}' /etc/shadow</pre> If the command ...Rule High Severity -
Verify No .forward Files Exist
The.forwardfile specifies an email address to forward the user's mail to.Rule Medium Severity -
Verify No netrc Files Exist
The <code>.netrc</code> files contain login information used to auto-login into FTP servers and reside in the user's home directory. These files ma...Rule Medium Severity
Node 2
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