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AIOS-27-006400 Apple iOS/iPadOS 27 (MOS) must be configured to not allow more than 10 consecutive failed authentication attempts.

DISA STIG library V1R1
All changes in this version
first version loaded CAT II

Maps to AC-7 via CCI-000044

Title

Apple iOS/iPadOS 27 (MOS) must be configured to not allow more than 10 consecutive failed authentication attempts.

Control

Review configuration settings to confirm that consecutive failed authentication attempts is set to 10 or fewer. This procedure is performed in the Apple iOS/iPadOS management tool and on the iPhone and iPad. Note: If an organization has multiple configuration profiles, the check procedure must be performed on the relevant configuration profiles applicable to the scope of the review. In the MDM server, verify in the Declarative Device Management (DDM) configuration "Passcode" that "Maximum failed attempts" has been set to "10" or fewer. On the iPhone and iPad: 1. Open the Settings app. 2. Tap "General". 3. Tap "VPN & Device Management". 4. Tap the Configuration Profile from the MDM server containing the policy. 5. Tap "Configurations" and then "Passcode". 6. Verify "Maximum failed attempts" is listed as "10" or fewer. If the "Maximum failed attempts" is more than 10 in the MDM server or on the iPhone and iPad, this is a finding.

Discussion

The more attempts an adversary has to guess a password, the more likely the adversary will enter the correct password and gain access to resources on the device. Setting a limit on the number of attempts mitigates this risk. Setting the limit at 10 or less gives authorized users the ability to make a few mistakes when entering the password but still provides adequate protection against dictionary or brute force attacks on the password. SFR ID: FMT_SMF_EXT.1.1 #2

Related controls

CCI-000044

Fix

Install a DDM profile to allow only 10 or fewer consecutive failed authentication attempts. In the MDM server, in the DDM configuration "Passcode", set "Maximum failed attempts" to "10" or fewer.