Multiple Vulnerabilities in Apple Products Could Allow for Arbitrary Code Execution

Multiple vulnerabilities have been discovered in Apple Products, the most severe of which could allow for arbitrary code execution.

• iOS is a mobile operating system for mobile devices, including the iPhone, iPad, and iPod touch.
• iPadOS is the successor to iOS 12 and is a mobile operating system for iPads.
• macOS Catalina is the 16th major release of macOS
• macOS Big Sur is the 17th release of macOS.
• macOS Monterey is the 18th and current major release of macOS.
• Safari is a graphical web browser developed by Apple.
• tvOS is an operating system for fourth-generation Apple TV digital media player.
• watchOS is the mobile operating system for Apple Watch and is based on the iOS operating system.

Successful exploitation of the most severe of these vulnerabilities could allow for arbitrary code execution in the context of the logged on user. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than those who operate with administrative user rights.

There are currently no reports that these vulnerabilities are being exploited in the wild.

Multiple vulnerabilities have been discovered in Apple Products, the most severe of which could allow for arbitrary code execution. Details of the most critical vulnerabilities are as follows:

Tactic: Initial Access (TA0001):
Technique: Drive-by Compromise (T1189):

• Processing maliciously crafted web content may lead to arbitrary code execution. (CVE-2022-2294) (CVE-2022-32787) (CVE-2022-32792)

Tactic: Execution (TA0002):
Technique: Exploitation for Client Execution (T1203):

• An app may cause unexpected app termination or arbitrary code execution (CVE-2022-26981)
• Processing a maliciously crafted file may lead to arbitrary code execution (CVE-2022-32802)
• An app may be able to execute arbitrary code with kernel privileges (CVE-2022-32796) (CVE-2022-32810) (CVE-2022-32811) (CVE-2022-32812) (CVE-2022-32814) (CVE-2022-32820) (CVE-2022-32821) (CVE-2022-32829) (CVE-2022-32840) (CVE-2022-26768)
• An app with root privileges may be able to execute arbitrary code with kernel privileges. (CVE-2022-32832) (CVE-2022-32813) (CVE-2022-32815)
• A remote user may be able to cause kernel code execution (CVE-2022-32788)
• A remote user may cause an unexpected app termination or arbitrary code execution (CVE-2022-32839)

Details of lower-severity vulnerabilities are as follows:

• Multiple issues in Vim (CVE-2021-4136) (CVE-2021-4166) (CVE-2021-4173) (CVE-2021-4187) (CVE-2021-4192) (CVE-2021-4193) (CVE-2021-416059) (CVE-2022-0128) (CVE-2022-0156) (CVE-2022-0158) (CVE-2021-46059)
• Multiple issues in subversion (CVE-2021-28544) (CVE-2022-24070) (CVE-2022-29046) (CVE-2022-29048)
• An app with root privileges may be able to access private information (CVE-2022-32781)
• An app with root privileges may be able to access private information (CVE-2022-32781)
• Visiting a maliciously crafted website may leak sensitive data. (CVE-2022-32784)
• Processing an image may lead to a denial-of-service (CVE-2022-32785)
• An app may be able to modify protected parts of the file system (CVE-2022-32786) (CVE-2022-32800)
• An app may be able to bypass Privacy preferences (CVE-2022-32789)
• An app may be able to disclose kernel memory (CVE-2022-32793) (CVE-2022-32817) (CVE-2022-32824) (CVE-2022-32825) (CVE-2022-32828)
• Processing a maliciously crafted AppleScript binary may result in unexpected termination or disclosure of process memory (CVE-2022-32797) (CVE-2022-32851) (CVE-2022-32852) (CVE-2022-32853) (CVE-2022-32831)
• A user in a privileged network position may be able to leak sensitive information (CVE-2022-32799)
• An app may be able to gain root privileges (CVE-2022-32801) (CVE-2022-32819) (CVE-2022-32826)
• An app may be able to access sensitive user information (CVE-2022-32805) (CVE-2022-32834) (CVE-2022-32849)
• An app may be able to overwrite arbitrary files (CVE-2022-32807)
• Visiting a website that frames malicious content may lead to UI spoofing (CVE-2022-32816)
• An app may be able to leak sensitive kernel state (CVE-2022-32818)
• An app may be able to leak sensitive user information (CVE-2022-32823)
• Processing a maliciously crafted image may lead to disclosure of user information (CVE-2022-32830)
• An app may be able to cause unexpected system termination or write kernel memory (CVE-2022-32837)
• An app may be able to read arbitrary files (CVE-2022-32838)
• Processing a maliciously crafted image may result in disclosure of process memory (CVE-2022-32841)
• An app may be able to gain elevated privileges (CVE-2022-32842) (CVE-2022-26704) (CVE-2022-32798)
• Processing a maliciously crafted Postscript file may result in unexpected app termination or disclosure of process memory (CVE-2022-32843)
• An app with arbitrary kernel read and write capability may be able to bypass Pointer Authentication (CVE-2022-32844)
• An app may be able to break out of its sandbox (CVE-2022-32845)
• A remote user may be able to cause unexpected system termination or corrupt kernel memory (CVE-2022-32847)
• An app may be able to capture a user’s screen (CVE-2022-32848)
• An app may be able to access user-sensitive data (CVE-2022-32849)
• A user may be able to view restricted content from the lock screen (CVE-2022-32855)
• A user in a privileged network position can track a user’s activity (CVE-2022-32857)

Successful exploitation of the most severe of these vulnerabilities could allow for arbitrary code execution in the context of the logged on user. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than those who operate with administrative user rights.

We recommend the following actions be taken:

• Apply the updates provided by Apple to vulnerable systems immediately after appropriate testing. (M1051: Update Software)
  o Safeguard 7.1: Establish and Maintain a Vulnerability Management Process: Establish and maintain a documented vulnerability management process for enterprise assets. Review and update documentation annually, or when significant enterprise changes occur that could impact this Safeguard
  o Safeguard 7.4: Perform Automated Application Patch Management: Perform application updates on enterprise assets through automated patch management on a monthly, or more frequent, basis.

• Apply the Principle of Least Privilege to all systems and services. Run all software as a non-privileged user (one without administrative privileges) to diminish the effects of a successful attack. (M1026: Privileged Account Management)
  o Safeguard 4.7: Manage Default Accounts on Enterprise Assets and Software: Manage default accounts on enterprise assets and software, such as root, administrator, and other pre-configured vendor accounts. Example implementations can include: disabling default accounts or making them unusable.
  o Safeguard 5.4: Restrict Administrator Privileges to Dedicated Administrator Accounts: Restrict administrator privileges to dedicated administrator accounts on enterprise assets. Conduct general computing activities, such as internet browsing, email, and productivity suite use, from the user’s primary, non-privileged account.

• Restrict use of certain websites, block downloads/attachments, block Javascript, restrict browser extensions, etc. (M1021: Restrict Web-Based Content)
  o Safeguard 9.2: Use DNS Filtering Services: Use DNS filtering services on all enterprise assets to block access to known malicious domains.
  o Safeguard 9.3: Maintain and Enforce Network-Based URL Filters: Enforce and update network-based URL filters to limit an enterprise asset from connecting to potentially malicious or unapproved websites. Example implementations include category-based filtering, reputation-based filtering, or through the use of block lists. Enforce filters for all enterprise assets.

• Train users to be aware of access or manipulation attempts by an adversary to reduce the risk of successful spearphishing, social engineering, and other techniques that involve user interaction. (M1017: User Training)
  o Safeguard 14.1: Establish and Maintain a Security Awareness Program: Establish and maintain a security awareness program. The purpose of a security awareness program is to educate the enterprise’s workforce on how to interact with enterprise assets and data in a secure manner. Conduct training at hire and, at a minimum, annually. Review and update content annually, or when significant enterprise changes occur that could impact this Safeguard
  o Safeguard 14.6: Train Workforce Members on Recognizing and Reporting Security Incidents: Train workforce members to be able to recognize a potential incident and be able to report such an incident.