CCI-000057 in U Apple iOS-iPadOS 16 BYOAD V1R1

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UNCLASSIFIED
Group Title
PP-MDF-333026
Group ID
V-257109
Rule Version
AIOS-16-706700
Rule Title
Apple iOS/iPadOS 16 must be configured to enable a screen-lock policy that will lock the display after a period of inactivity.
Rule ID
SV-257109r904227_rule
Rule Severity
● Medium
Rule Weight
10.0
Vuln Discussion

The screen-lock timeout helps protect the device from unauthorized access. Devices without a screen-lock timeout provide an opportunity for adversaries who gain physical access to the mobile device through loss, theft, etc. Such devices are much more likely to be in an unlocked state when acquired by an adversary, thus granting immediate access to the data on the mobile device and possibly access to DOD networks.

SFR ID: FMT_SMF_EXT.1.1 #2a

Documentable
False
Check Content

Review configuration settings to confirm the screen lock timeout is set to 15 minutes or less.

This check procedure is performed on both the Apple iOS/iPadOS management tool and 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.

For User Enrollment, check a sample of user phones to verify compliance:

1. Open "Settings".

2. Tap "Display & Brightness".

3. Tap "Auto-Lock".

4. Verify "Auto-Lock" has been set to "5 minutes" or less. 

For Device Enrollment, in the management tool, verify the sum of the values assigned to "Maximum Auto-Lock time" and "Grace period for device lock" is between 1 and 15 minutes.

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 iOS management tool containing the password policy.

5. Tap "Restrictions".

6. Tap "Passcode".

7. Verify the sum of the "Max grace period" and "Max inactivity" values is less than 15 minutes.

Note: On some iOS/iPadOS devices, it is not possible to have a sum of exactly 15. In these cases, the sum must be less than 15. A sum of 16 does not meet the requirement.

For User Enrollment, if on sampled Apple devices the Auto-Lock is not set to 5 minutes or less, this is a finding.

For Device Enrollment, on the management server, if the sum of the "Max grace period" and "Max inactivity" values is not between 1 and 15 minutes in the iOS/iPadOS management tool or if on the iPhone/iPad, the sum of the values assigned to "Max grace period" and "Max inactivity" is not between 1 and 15 minutes, this is a finding.

Check System
C-60794r904225_chk
Fix Reference
F-60735r904226_fix
Fix Text

For User Enrollment, this is a User-Based Enforcement (UBE) control. The device user must configure setting on their personal phone.

1. Open "Settings".

2. Tap "Display & Brightness".

3. Tap "Auto-Lock".

4. Set "Auto-Lock" to "5 minutes" or less.

For Device Enrollment, install a configuration profile to lock the device display after 15 minutes (or less) of inactivity. This is done by setting "Maximum Auto-Lock time" and "Grace Period for device lock" so the sum of their values is between 1 and 15 minutes.

Identities
CCI-000057

The information system initiates a session lock after the organization-defined time period of inactivity.

  • 800-53 :: AC-11 a
  • 800-53 Rev. 4 :: AC-11 a
  • 800-53 Rev. 5 :: AC-11 a
  • 800-53A :: AC-11.1 (ii)
Group Title
PP-MDF-333030
Group ID
V-257110
Rule Version
AIOS-16-706800
Rule Title
Apple iOS/iPadOS 16 must be configured to lock the display after 15 minutes (or less) of inactivity.
Rule ID
SV-257110r904230_rule
Rule Severity
● Medium
Rule Weight
10.0
Vuln Discussion

The screen lock timeout must be set to a value that helps protect the device from unauthorized access. Having a too-long timeout would increase the window of opportunity for adversaries who gain physical access to the mobile device through loss, theft, etc. Such devices are much more likely to be in an unlocked state when acquired by an adversary, thus granting immediate access to the data on the mobile device. The maximum timeout period of 15 minutes has been selected to balance functionality and security; shorter timeout periods may be appropriate depending on the risks posed to the mobile device.

SFR ID: FMT_SMF_EXT.1.1 #2b

Documentable
False
Check Content

Review configuration settings to confirm the screen lock timeout is set to 15 minutes or less.

This check procedure is performed on both the Apple iOS/iPadOS management tool and 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.

For User Enrollment, check a sample of user phones to verify compliance:

1. Open "Settings".

2. Tap "Display & Brightness".

3. Tap "Auto-Lock".

4. Verify "Auto-Lock" has been set to "5 minutes" or less.

For Device Enrollment, in the management tool, verify the sum of the values assigned to "Maximum Auto-Lock time" and "Grace period for device lock" is between 1 and 15 minutes.

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 iOS management tool containing the password policy.

5. Tap "Restrictions".

6. Tap "Passcode".

7. Verify the sum of the "Max grace period" and "Max inactivity" values is less than 15 minutes.

Note: On some iOS/iPadOS devices, it is not possible to have a sum of exactly 15. In these cases, the sum must be less than 15. A sum of 16 does not meet the requirement.

For User Enrollment, if on sampled Apple devices the Auto-Lock is not set to 5 minutes or less, this is a finding.

For Device Enrollment, on the management server, if the sum of the "Max grace period" and "Max inactivity" values is not between 1 and 15 minutes in the iOS/iPadOS management tool or if on the iPhone/iPad, the sum of the values assigned to "Max grace period" and "Max inactivity" is not between 1 and 15 minutes, this is a finding.

Check System
C-60795r904228_chk
Fix Reference
F-60736r904229_fix
Fix Text

For User Enrollment, this is a User-Based Enforcement (UBE) control. The device user must configure setting on their personal phone.

1. Open "Settings".

2. Tap "Display & Brightness".

3. Tap "Auto-Lock".

4. Set "Auto-Lock" to "5 minutes" or less.

For Device Enrollment, install a configuration profile to lock the device display after 15 minutes (or less) of inactivity. This is done by setting "Maximum Auto-Lock time" and "Grace Period for device lock" so the sum of their values is between 1 and 15 minutes.

Identities
CCI-000057

The information system initiates a session lock after the organization-defined time period of inactivity.

  • 800-53 :: AC-11 a
  • 800-53 Rev. 4 :: AC-11 a
  • 800-53 Rev. 5 :: AC-11 a
  • 800-53A :: AC-11.1 (ii)
UNCLASSIFIED