Title

The VMM must enforce the limit of three consecutive invalid logon attempts by a user during a 15-minute time period. (Cat II impact)

Discussion

By limiting the number of failed login attempts, the risk of unauthorized VMM access via user password guessing, otherwise known as brute-forcing, is reduced. Limits are imposed by locking the account. This restriction may be relaxed for administrative accounts to avoid potential Denial of Service.

Check Content

Verify the VMM enforces the limit of three consecutive invalid logon attempts by a user during a 15-minute time period. If it does not, this is a finding.

Fix Text

Configure the VMM to enforce the limit of three consecutive invalid logon attempts by a user during a 15-minute time period, by locking the account.

Additional Identifiers

Rule ID: SV-207342r958388_rule

Vulnerability ID: V-207342

Group Title: SRG-OS-000021

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.