Multiple Vulnerabilities in Apple Products Could Allow for Arbitrary Code Execution

ITS ADVISORY NUMBER:

2020-167

DATE(S) ISSUED:

Tuesday, December 15, 2020

SUBJECT:

Multiple Vulnerabilities in Apple Products Could Allow for Arbitrary Code Execution

OVERVIEW:

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

iCloud for Windows is a cloud storage service that can be used on Windows computers.
watchOS is a mobile operating system created & developed by Apple to be utilized by its Apple Watch product line.
iOS is a mobile operating system created & developed by Apple to be utilized by its mobile devices such as the iPhone.
Safari is a web browser available for macOS.
tvOS is an operating system based on iOS developed for AppleTV.
macOS Server is a desktop operating system for Macintosh computers.
iPadOS is a mobile operating system created & developed by Apple to be utilized by its iPad product line.

Successful exploitation of the most severe of these vulnerabilities could result in arbitrary code execution within the context of the application, an attacker gaining the same privileges as the logged-on user, or the bypassing of security restrictions. Depending on the permission associated with the application running the exploit, an attacker could then install programs; view, change, or delete data.

THREAT INTELLIGENCE:

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

SYSTEMS AFFECTED:

watchOS versions prior to 7.2 and 6.3
macOS versions prior to Big Sur 11.1, Security Update 2020-001 Catalina, Security Update 2020-007 Mojave
tvOS versions prior to tvOS 14.3
iOS versions prior to 14.3 and 12.5
iPadOS versions prior to 14.3
macOS Server versions prior to 5.11
Safari versions prior to 14.0.2

RISK:

Government:
Large and medium government entities: High

Small government entities: High

Business:

Large and medium business entities: High

Small business entities: High

Home Users: Low

DESCRIPTION:

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

iOS 14.3 and iPadOS 14.3

A logic issue was addressed with improved state management (CVE-2020-29613)

An out-of-bounds write issue was addressed with improved bounds checking (CVE-2020-27948)
An information disclosure issue was addressed with improved state management (CVE-2020-27946)
A memory corruption issue existed in the processing of font files. This issue was addressed with improved input validation (CVE-2020-27943, CVE-2020-27944)
An out-of-bounds read was addressed with improved input validation (CVE-2020-29617, CVE-2020-29619)
An out-of-bounds read was addressed with improved input validation (CVE-2020-29618)
An out-of-bounds write issue was addressed with improved bounds checking (CVE-2020-29611)
Unauthorized code execution may lead to an authentication policy violation (CVE-2020-27951)
A use after free issue was addressed with improved memory management (CVE-2020-15969)

iOS 12.5

Unauthorized code execution may lead to an authentication policy violation (CVE-2020-27951)

watchOS 6.3

Unauthorized code execution may lead to an authentication policy violation (CVE-2020-27951)

watchOS 7.2

An out-of-bounds write issue was addressed with improved bounds checking (CVE-2020-27948)
An information disclosure issue was addressed with improved state management (CVE-2020-27946)
A memory corruption issue existed in the processing of font files. This issue was addressed with improved input validation (CVE-2020-27943, CVE-2020-27944)
An out-of-bounds read was addressed with improved input validation (CVE-2020-29617, CVE-2020-29619)
An out-of-bounds read was addressed with improved input validation (CVE-2020-29618)
An out-of-bounds write issue was addressed with improved bounds checking (CVE-2020-29611)
Unauthorized code execution may lead to an authentication policy violation (CVE-2020-27951)
A use after free issue was addressed with improved memory management (CVE-2020-15969)

macOS Big Sur 11.1, Security Update 2020-001 Catalina, Security Update 2020-007 Mojave

A memory corruption issue was addressed with improved input validation (CVE-2020-27914, CVE-2020-27915)
An application may be able to gain elevated privileges (CVE-2020-27903)
An application may be able to execute arbitrary code with kernel privileges (CVE-2020-27941)
A malicious application may be able to bypass Privacy preferences (CVE-2020-29621)
An out-of-bounds read was addressed with improved input validation (CVE-2020-27910)
An out-of-bounds read was addressed with improved bounds checking (CVE-2020-9943)
An out-of-bounds read was addressed with improved bounds checking (CVE-2020-9944)
An out-of-bounds write was addressed with improved input validation (CVE-2020-27916)
Multiple integer overflows were addressed with improved input validation (CVE-2020-27906)
An out-of-bounds write issue was addressed with improved bounds checking (CVE-2020-27948, CVE-2020-9955)
An out-of-bounds read was addressed with improved input validation (CVE-2020-9960, CVE-2020-27908)
An out-of-bounds write was addressed with improved input validation (CVE-2020-10017)
A logic issue was addressed with improved state management (CVE-2020-27922)
An information disclosure issue was addressed with improved state management (CVE-2020-27946, CVE-2020-9849)
A buffer overflow was addressed with improved size validation (CVE-2020-9962)
An out-of-bounds write was addressed with improved input validation (CVE-2020-27952)
An out-of-bounds read was addressed with improved input validation (CVE-2020-9956)
A memory corruption issue existed in the processing of font files (CVE-2020-27931, CVE-2020-27943, CVE-2020-27944)
A logic issue was addressed with improved state management (CVE-2020-10002)
A memory corruption issue was addressed with improved input validation (CVE-2020-27947)
An out-of-bounds write issue was addressed with improved bounds checking (CVE-2020-29612)
An attacker in a privileged network position may be able to unexpectedly alter application state (CVE-2020-9978)
An out-of-bounds write was addressed with improved input validation (CVE-2020-27919)
A memory corruption issue was addressed with improved input validation (CVE-2020-29616)
An out-of-bounds read was addressed with improved input validation (CVE-2020-27924, CVE-2020-29618)
An out-of-bounds write issue was addressed with improved bounds checking (CVE-2020-29611)
An out-of-bounds read was addressed with improved input validation (CVE-2020-29617, CVE-2020-29619)
An out-of-bounds write was addressed with improved input validation (CVE-2020-27912, CVE-2020-27923)
An out-of-bounds write issue was addressed with improved bounds checking (CVE-2020-10015, CVE-2020-27897)
A memory corruption issue was addressed with improved memory handling (CVE-2020-27907)
A logic issue was addressed with improved state management (CVE-2020-9974)
A memory corruption issue was addressed with improved state management (CVE-2020-10016)
Multiple memory corruption issues were addressed with improved input validation (CVE-2020-9967)
A use after free issue was addressed with improved memory management (CVE-2020-9975, CVE-2020-27899)
A race condition was addressed with improved state handling (CVE-2020-27921)
A malicious application may cause unexpected changes in memory belonging to processes traced by DTrace (CVE-2020-27949)
A malicious application may be able to elevate privileges (CVE-2020-29620)
An integer overflow was addressed through improved input validation (CVE-2020-27911)
A use after free issue was addressed with improved memory management (CVE-2020-27920)
A use after free issue was addressed with improved memory management (CVE-2020-27926)
A parsing issue in the handling of directory paths was addressed with improved path validation (CVE-2020-10014)
A path handling issue was addressed with improved validation (CVE-2020-10010)
An out-of-bounds read was addressed with improved input validation (CVE-2020-13524)
A logic issue was addressed with improved state management (CVE-2020-10004)
A logic issue was addressed with improved restrictions (CVE-2020-27901, CVE-2020-10008)
A logic issue was addressed with improved state management (CVE-2020-10007)
An access issue was addressed with improved access restrictions (CVE-2020-10012)
A path handling issue was addressed with improved validation (CVE-2020-27896)
A logic issue was addressed with improved state management (CVE-2020-10009)
A use after free issue was addressed with improved memory management (CVE-2020-15969)
A denial of service issue was addressed with improved state handling (CVE-2020-27898)
A logic issue was addressed with improved validation (CVE-2020-9971)
An issue existed in the handling of snapshots. The issue was resolved with improved permissions logic (CVE-2020-27900)
The issue was addressed with improved handling of icon caches (CVE-2020-9963)
A validation issue existed in the entitlement verification. This issue was addressed with improved validation of the process entitlement (CVE-2020-9977)
An inconsistent user interface issue was addressed with improved state management (CVE-2020-9942)
This issue was addressed with improved checks (CVE-2020-9991)
This issue was addressed with improved entitlements (CVE-2020-10006)

macOS Server 5.11

An issue existed in the parsing of URLs. This issue was addressed with improved input validation (CVE-2020-9995)

tvOS 14.3

An out-of-bounds write issue was addressed with improved bounds checking (CVE-2020-27948)
An information disclosure issue was addressed with improved state management (CVE-2020-27946)
A memory corruption issue existed in the processing of font files. This issue was addressed with improved input validation (CVE-2020-27943, CVE-2020-27944)
An out-of-bounds read was addressed with improved input validation (CVE-2020-29617, CVE-2020-29619)
An out-of-bounds read was addressed with improved input validation (CVE-2020-29618)
An out-of-bounds write issue was addressed with improved bounds checking (CVE-2020-29611)
A use after free issue was addressed with improved memory management (CVE-2020-15969)

Safari 14.0.2

A use after free issue was addressed with improved memory management (CVE-2020-15969)

ACTIONS:

After appropriate testing, immediately apply patches provided by Apple to vulnerable systems.
Run all software as a non-privileged user (one without administrative privileges) to diminish the effects of a successful attack.
Remind users not to download, accept, or execute files from un-trusted or unknown sources.
Remind users not to visit untrusted websites or follow links provided by unknown or un-trusted sources.
Apply the Principle of Least Privilege to all systems and services.