Vulnerability Discussion

Without re-authentication, users may access resources or perform tasks for which they do not have authorization.

When operating systems provide the capability to escalate a functional capability, it is critical the user re-authenticate.

Check

Verify AlmaLinux OS 9 requires reauthentication when using the "sudo" command to elevate privileges with the following command:

$ grep timestamp_timeout /etc/sudoers /etc/sudoers.d/*

/etc/sudoers.d/01_stig:Defaults timestamp_timeout=0

If results are returned from more than one file location, this is a finding.

If "timestamp_timeout" is set to a value other than "0" (including negative numbers), is commented out, or is missing entirely, this is a finding.

Fix

Configure AlmaLinux OS 9 to reauthenticate "sudo" commands after the specified timeout:

Add the following line to "/etc/sudoers" or a file in "/etc/sudoers.d":

Defaults timestamp_timeout=0

Remove any duplicate definitions.