Information
To enforce the use of complex passwords, minimum numbers of characters of different classes are mandated. The use of complex passwords reduces the ability of attackers to successfully obtain valid passwords using guessing or exhaustive search techniques. Complexity requirements increase the password search space by requiring users to construct passwords from a larger character set than they may otherwise use.
NOTE: Nessus has not performed this check. Please review the benchmark to ensure target compliance.
Solution
Temporarily disable Lockdown Mode and enable the ESXi Shell via the vSphere Client. Open the vSphere/VMware Infrastructure (VI) Client and log in with appropriate credentials. If connecting to vCenter Server, click on the desired host. Click the Configuration tab. Click Software, Security Profile, Services, Properties, ESXi Shell and Options, respectively. Start the ESXi Shell service, where/as required.
As root, log in to the host and ensure the expected settings of the 'min' keyword are configured in the /etc/pam.d/passwd file.
# vi /etc/pam.d/passwd
Set the 'N4' password complexity field to '14' or greater and set the 'N0' thru 'N3' fields to 'disabled', i.e., min=disabled,disabled,disabled,disabled,14
Re-enable Lockdown Mode on the host.