Apple iOS 10 Security Technical Implementation Guide

Overview

Version	Date	Finding Count (39)			Downloads
1	2017-02-14 2016-10-25 2016-11-22	CAT I (High): 3	CAT II (Med): 25	CAT III (Low): 11	Excel	JSON	XML

STIG Description
This Security Technical Implementation Guide is published as a tool to improve the security of Department of Defense (DoD) information systems. The requirements are derived from the National Institute of Standards and Technology (NIST) 800-53 and related documents. Comments or proposed revisions to this document should be sent via email to the following address: disa.stig_spt@mail.mil.

Available Profiles

Classified	Public	Sensitive
I - Mission Critical Classified	I - Mission Critical Public	I - Mission Critical Sensitive	II - Mission Support Classified	II - Mission Support Public	II - Mission Support Sensitive	III - Administrative Classified	III - Administrative Public	III - Administrative Sensitive

Findings (MAC III - Administrative Sensitive)

Finding ID	Severity	Title	Description
V-71839	High	Apple iOS must implement the management setting: Encrypt iTunes backups.	When syncing an Apple iOS device to a computer running iTunes, iTunes will prompt the user to back up the Apple iOS device. If the performed backup is not encrypted, this could lead to the...
V-71779	High	Apple iOS must require a valid password be successfully entered before the mobile device data is unencrypted.	Passwords provide a form of access control that prevents unauthorized individuals from accessing computing resources and sensitive data. Passwords may also be a source of entropy for generation of...
V-71865	High	Apple iOS device must have the latest available iOS operating system installed.	Required security features are not available in earlier OS versions. In addition, there are known vulnerabilities in earlier versions. SFR ID: FMT_SMF_EXT.1.1 #45
V-71791	Medium	Apple iOS must not allow backup to remote systems (iCloud Photo Sharing, also known as Shared Photo Streams).	When iCloud Photo Sharing is enabled, sensitive photos will be uploaded automatically to Apple-specified servers and available on the Apple IOS devices of other users who have accepted invitations...
V-71799	Medium	Apple iOS must not display notifications (calendar information) when the device is locked.	Many mobile devices display notifications (including calendar information) on the lock screen so users can obtain relevant information in a timely manner without having to frequently unlock the...
V-71773	Medium	Apple iOS must lock the display after 15 minutes (or less) of inactivity.	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...
V-71785	Medium	Apple iOS must not allow backup to remote systems (iCloud document and data synchronization).	Backups to remote systems (including cloud backup and cloud document syncing) can leave data vulnerable to breach on the external systems, which often offer less protection than the MOS. Where the...
V-71787	Medium	Apple iOS must not allow backup to remote systems (iCloud Keychain).	The iCloud Keychain is an Apple iOS function that will store users' account names and passwords in iCloud and then synchronize this data among the users' Macs, iPhones, and iPads. An adversary may...
V-71783	Medium	Apple iOS must not allow backup to remote systems (iCloud).	Backups to remote systems (including cloud backup) can leave data vulnerable to breach on the external systems, which often offer less protection than the MOS. Where the remote backup involves a...
V-71789	Medium	Apple iOS must not allow backup to remote systems (My Photo Stream).	When My Photo Stream is enabled, sensitive photos will be uploaded automatically to Apple-specified servers and available on other Apple iOS devices associated with the same Apple ID, provided...
V-71879	Medium	Apple iOS must implement the management setting: not allow a user to remove Apple iOS configuration profiles that enforce DoD security requirements.	Configuration profiles define security policies on Apple iOS devices. If a user is able to remove a configuration profile, the user can then change the configuration that had been enforced by that...
V-71877	Medium	Apple iOS must implement the management setting: remove managed applications upon unenrollment from MDM.	When a device is unenrolled from MDM, it is possible to relax the security policies that the MDM had implemented on the device. This may cause apps and data to be more vulnerable than they were...
V-71875	Medium	Apple iOS must implement the management setting: not share location data through iCloud.	Sharing of location data is an operations security (OPSEC) risk because it potentially allows an adversary to determine a DoD user's location and movements and patterns in those movements over...
V-71803	Medium	Apple iOS must not include applications with the following characteristics: Voice dialing application if available when MD is locked.	On Apple iOS devices, users can access the device's contact database or calendar to obtain phone numbers and other information using a human voice even when the mobile device is locked. Often this...
V-71873	Medium	Apple iOS must implement the management setting: not have any Family Members in Family Sharing.	Apple's Family Sharing service allows Apple iOS users to create a Family Group whose members have several shared capabilities, including the ability to lock, wipe, play a sound on, or locate the...
V-71871	Medium	Apple iOS must implement the management setting: Treat Airdrop as an unmanaged destination.	An Airdrop feature is a way to send contact information or photos to other users with this same feature enabled. This feature enables a possible attack vector for adversaries to exploit. Once the...
V-71869	Medium	Apple iOS must implement the management setting: not allow messages in an ActiveSync Exchange account to be forwarded or moved to other accounts in the Apple iOS Mail app.	The Apple iOS Mail app can be configured to support multiple email accounts concurrently. These email accounts are likely to involve content of varying degrees of sensitivity (e.g., both personal...
V-71867	Medium	Apple iOS must implement the management setting: use SSL for Exchange ActiveSync.	Exchange email messages are a form of data in transit and thus are vulnerable to eavesdropping and man-in-the-middle attacks. Secure Sockets Layer (SSL), also referred to as Transport Layer...
V-71851	Medium	Apple iOS must implement the management setting: Disable Allow MailDrop.	MailDrop allows users to send large attachments up to 5 GB in size via iCloud. Storing data with a non-DoD cloud provider may leave the data vulnerable to breach. Disabling non-DoD cloud services...
V-72331	Medium	Apple iOS must be configured to wipe all sensitive DoD data (Controlled Unclassified Information (CUI)/For Official Use Only (FOUO)) and Personally Identifiable Information (PII) data during a remote wipe command from the MDM server.	DoD sensitive data (CUI/FOUO) or PII data downloaded from DoD web sites via Safari will be saved by default in a non-managed app on a DoD iOS device. If the device is wiped via an MDM Enterprise...
V-71845	Medium	Apple iOS must not allow backup to remote systems (managed applications data stored in iCloud).	Storing data with a non-DoD cloud provider may leave the data vulnerable to breach. Disabling non-DoD cloud services mitigates this risk. SFR ID: FMT_SMF_EXT.1.1 #45
V-71797	Medium	Apple iOS must not display notifications when the device is locked.	Many mobile devices display notifications on the lock screen so users can obtain relevant information in a timely manner without having to frequently unlock the phone to determine if there are new...
V-71801	Medium	Apple iOS must not include applications with the following characteristics: Siri when the device is locked.	On Apple iOS devices, users can access the device's contact database or calendar to obtain phone numbers and other information using a human voice even when the mobile device is locked. Often this...
V-71807	Medium	Apple iOS must not allow non-DoD applications to access DoD data.	Managed apps have been approved for the handling of DoD-sensitive information. Unmanaged apps are provided for productivity and morale purposes but are not approved to handle DoD-sensitive...
V-71805	Medium	Apple iOS must be configured to disable Touch ID.	Many mobile devices now permit a user to unlock the user's device by presenting a fingerprint to an embedded fingerprint reader. Other biometrics and token-based systems are feasible as well. None...
V-71883	Medium	Apple iOS must wipe protected or sensitive data upon unenrollment from MDM.	When a mobile device is no longer going to be managed by MDM technologies, its protected/sensitive data must be sanitized because it will no longer be protected by the MDM software, so it is at...
V-71881	Medium	Apple iOS must not allow backup to locally connected systems.	Data on mobile devices is protected by numerous mechanisms, including user authentication, access control, and cryptography. When the data is backed up to an external system (either locally...
V-71857	Medium	Apple iOS must implement the management setting: Disable Allow iCloud Photo Library.	Storing data with a non-DoD cloud provider may leave the data vulnerable to breach. Disabling non-DoD cloud services mitigates this risk. SFR ID: FMT_SMF_EXT.1.1 #45
V-71777	Low	Apple iOS must not allow more than 10 consecutive failed authentication attempts.	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...
V-71781	Low	Apple iOS must not allow passwords that include more than two repeating or sequential characters.	Password strength is a measure of the effectiveness of a password in resisting guessing and brute force attacks. Passwords that contain repeating or sequential characters are significantly easier...
V-71793	Low	Apple iOS must disable automatic transfer of diagnostic data to an external device other than an MDM service with which the device has enrolled.	Many software systems automatically send diagnostic data to the manufacturer or a third party. This data enables the developers to understand real-world field behavior and improve the product...
V-71809	Low	Apple iOS must implement the management setting: not allow automatic completion of Safari browser passcodes.	The AutoFill functionality in the Safari web browser allows the user to complete a form that contains sensitive information, such as PII, without previous knowledge of the information. By allowing...
V-71795	Low	Apple iOS must implement the management setting: limit Ad Tracking.	Ad Tracking refers to the advertisers' ability to categorize the device and spam the user with ads that are most relevant to the user's preferences. By not "Force limiting ad tracking",...
V-71843	Low	Apple iOS must implement the management setting: not allow use of Handoff.	Handoff permits a user of an Apple iOS device to transition user activities from one device to another. Handoff passes sufficient information between the devices to describe the activity, but app...
V-71847	Low	Apple iOS must implement the management setting: require the user to enter a password when connecting to an AirPlay-enabled device for the first time.	When a user is allowed to use AirPlay without a password, there is the potential that it may mistakenly associate the Apple iOS device with an AirPlay-enabled device other than the one intended...
V-71841	Low	Apple iOS must not allow backup to remote systems (enterprise books).	Enterprise books may contain DoD-sensitive information. When enterprise books are backed up, they are vulnerable to attacks on the backup systems and media. Disabling the backup capability...
V-71775	Low	Apple iOS must enforce a minimum password length of six characters.	Password strength is a measure of the effectiveness of a password in resisting guessing and brute force attacks. The ability to crack a password is a function of how many attempts an adversary is...
V-71885	Low	Apple iOS must implement the management setting: force Apple Watch wrist detection.	Because Apple Watch is a personal device, it is key that any sensitive DoD data displayed on the Apple Watch not be viewable when the watch is not in the immediate possession of the user. This...
V-71889	Low	Before establishing a user session, Apple iOS must display an administrator-specified advisory notice and consent warning banner regarding use of the mobile operating system.	To facilitate the legal monitoring of mobile devices and investigations pertaining to those devices, the MOS is required to display the DoD-approved system use notification message or banner...