Multiple Vulnerabilities in Apple Products Could Allow for Arbitrary Code Execution

DESCRIPTION:
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 and cloud computing service.
* Xcode is an integrated development environment (IDE) for macOS.
* Safari is a graphical web browser developed by Apple, based on the
WebKit engine.
* macOS Big Sur is the 17th and current major release of macOS.
* macOS Catalina is the 16th major release of macOS.
* macOS Mojave is the 15th major release of macOS.
* 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.
* watchOS is the mobile operating system for the Apple Watch and is
based on the iOS operating system.
* tvOS is an operating system for the fourth-generation Apple TV digital
media player.
* iTunes for Windows is a media player, media library, Internet radio
broadcaster, mobile device management utility, and the client app for
the iTunes Store.
* GarageBand is a line of digital audio workstations for macOS, iPadOS,
and iOS devices that allows users to create music or podcasts.

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.

IMPACT:
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 14.5 and iPadOS 14.5
* An issue in code signature validation was addressed with improved
checks. (CVE-2021-1835)
* A certificate validation issue was addressed. (CVE-2021-1837)
* An issue in code signature validation was addressed with improved
checks. (CVE-2021-1849)
* An out-of-bounds read was addressed with improved input validation.
(CVE-2021-1867)
* A logic issue was addressed with improved state management.
(CVE-2021-1810)
* A logic issue was addressed with improved restrictions. (CVE-2021-1836)
* A memory corruption issue was addressed with improved validation.
(CVE-2021-1808)
* A memory initialization issue was addressed with improved memory
handling. (CVE-2021-1857)
* An out-of-bounds read was addressed with improved input validation.
(CVE-2021-1846)
* A memory corruption issue was addressed with improved validation.
(CVE-2021-1809)
* A validation issue was addressed with improved logic. (CVE-2021-30659)
* A logic issue was addressed with improved state management.
(CVE-2021-1811)
* A logic issue was addressed with improved state management.
(CVE-2021-1872)
* An out-of-bounds read was addressed with improved input validation.
(CVE-2021-1881)
* A memory corruption issue was addressed with improved validation.
(CVE-2021-1882)
* A validation issue was addressed with improved logic. (CVE-2021-1813)
* An access issue was addressed with improved memory management.
(CVE-2021-30656)
* Heap corruption issue was addressed with improved checks. (CVE-2021-1883)
* A denial of service condition was addressed with improved locking.
(CVE-2021-1884)
* Out-of-bounds read issue were addressed with improved bounds checking.
(CVE-2021-1885)
* Processing of maliciously crafted image was addressed with improved
checks. (CVE-2021-30653, CVE-2021-1843)
* Out-of-bounds write issue were addressed with improved bounds
checking. (CVE-2021-1858)
* A use after free issue was addressed with improved memory management.
(CVE-2021-1864)
* An out-of-bounds read was addressed with improved input validation.
(CVE-2021-1877, CVE-2021-1852, CVE-2021-1830)
* A logic issue was addressed with improved state management.
(CVE-2021-1874, CVE-2021-1851)
* A buffer overflow was addressed with improved bounds checking.
(CVE-2021-1816)
* File permission issue was addressed with improved permissions logic.
(CVE-2021-1832)
* An out-of-bounds read was addressed with improved bounds checking.
(CVE-2021-30660)
* Root privilege condition was addressed with additional validation.
(CVE-2021-30652)
* A double free issue was addressed with improved memory management.
(CVE-2021-1875)
* A logic issue was addressed with improved restrictions. (CVE-2021-1822)
* An issue obscuring passwords in screenshots was addressed with
improved logic. (CVE-2021-1865)
* A validation issue was addressed with improved input sanitization.
(CVE-2021-1807)
* An application may allow shortcuts issue was addressed with improved
permissions logic. (CVE-2021-1831)
* A logic issue was addressed with improved state management.
(CVE-2021-1868)
* A call termination issue was addressed with improved logic.
(CVE-2021-1854)
* Sensitive information disclosure issue was addressed with improved UI
handling. (CVE-2021-1848)
* A cross site scripting vulnerability was addressed with improved input
validation. (CVE-2021-1825)
* A memory corruption issue was addressed with improved state
management. (CVE-2021-1817)
* A logic issue was addressed with improved restrictions. (CVE-2021-1826)
* A memory initialization issue was addressed with improved memory
handling. (CVE-2021-1820)
* Arbitrary code execution issue was addressed with improved memory
management. (CVE-2021-30661)
* A use after free issue was addressed with improved memory management.
(CVE-2021-7463)

Garage Band 10.4.3
* A local attacker may be able to read sensitive information.
(CVE-2021-30654)

iTunes 12.11.3
* A double free issue was addressed with improved memory management.
(CVE-2021-1875)
* A logic issue was addressed with improved state management.
(CVE-2021-1811)
* An input validation issue was addressed with improved input
validation. ((CVE-2021-1825)
* A use after free issue was addressed with improved memory management.
(CVE-2021-7463)

Xcode 12.5
* Arbitrary code execution issue was addressed with improved checks.
(CVE-2021-21300)

iCloud for Windows 12.3
* A memory initialization issue was addressed with improved memory
handling. (CVE-2021-1857)
* A logic issue was addressed with improved state management.
(CVE-2021-1811)
* An input validation issue was addressed with improved input
validation. ((CVE-2021-1825)
* A use after free issue was addressed with improved memory management.
(CVE-2021-7463)

tvOS 14.5
* An issue in code signature validation was addressed with improved
checks. (CVE-2021-1849)
* A logic issue was addressed with improved restrictions. (CVE-2021-1836)
* A memory corruption issue was addressed with improved validation.
(CVE-2021-1808)
* A memory initialization issue was addressed with improved memory
handling. (CVE-2021-1857)
* An out-of-bounds read was addressed with improved input validation.
(CVE-2021-1846)
* A memory corruption issue was addressed with improved validation.
(CVE-2021-1809)
* A logic issue was addressed with improved state management.
(CVE-2021-1811)
* An out-of-bounds read was addressed with improved input validation.
(CVE-2021-1881)
* A memory corruption issue was addressed with improved validation.
(CVE-2021-1882)
* A validation issue was addressed with improved logic. (CVE-2021-1813)
* Heap corruption issue was addressed with improved checks. (CVE-2021-1883)
* A denial of service condition was addressed with improved locking.
(CVE-2021-1884)
* Out-of-bounds read issue were addressed with improved bounds checking.
(CVE-2021-1885)
* Processing of maliciously crafted image was addressed with improved
checks. (CVE-2021-30653, CVE-2021-1843)
* Out-of-bounds write issue were addressed with improved bounds
checking. (CVE-2021-1858)
* A use after free issue was addressed with improved memory management.
(CVE-2021-1864)
* A memory initialization issue was addressed with improved memory
handling. (CVE-2021-1860)
* A buffer overflow was addressed with improved bounds checking.
(CVE-2021-1816)
* A logic issue was addressed with improved state management.
(CVE-2021-1851)
* File permission issue was addressed with improved permissions logic.
(CVE-2021-1832)
* An out-of-bounds read was addressed with improved bounds checking.
(CVE-2021-30660)
* Root privilege condition was addressed with additional validation.
(CVE-2021-30652)
* A double free issue was addressed with improved memory management.
(CVE-2021-1875)
* A logic issue was addressed with improved restrictions. (CVE-2021-1822)
* A parsing issue in the handling of directory paths was addressed with
improved path validation.  (CVE-2021-1815, CVE-2021-1739, CVE-2021-1740)
* A logic issue was addressed with improved state management.
(CVE-2021-1868)
* A memory corruption issue was addressed with improved validation.
(CVE-2021-1844)
* An input validation issue was addressed with improved input
validation. ((CVE-2021-1825)
* A memory corruption issue was addressed with improved state
management. (CVE-2021-1817)
* A logic issue was addressed with improved restrictions. (CVE-2021-1826)
* A memory initialization issue was addressed with improved memory
handling. (CVE-2021-1820)
* Arbitrary code execution issue was addressed with improved memory
management. (CVE-2021-30661)

watchOS 7.4
* An issue in code signature validation was addressed with improved
checks. (CVE-2021-1849)
* A memory corruption issue was addressed with improved validation.
(CVE-2021-1808)
* A memory initialization issue was addressed with improved memory
handling. (CVE-2021-1857)
* An out-of-bounds read was addressed with improved input validation.
(CVE-2021-1846)
* A memory corruption issue was addressed with improved validation.
(CVE-2021-1809)
* A validation issue was addressed with improved logic. (CVE-2021-30659)
* A logic issue was addressed with improved state management.
(CVE-2021-1811)
* A logic issue was addressed with improved state management.
(CVE-2021-1872)
* An out-of-bounds read was addressed with improved input validation.
(CVE-2021-1881)
* A logic issue was addressed with improved restrictions. (CVE-2021-1822)
* A validation issue was addressed with improved logic. (CVE-2021-1813)
* Heap corruption issue was addressed with improved checks. (CVE-2021-1883)
* A denial of service condition was addressed with improved locking.
(CVE-2021-1884)
* Processing of maliciously crafted image was addressed with improved
checks. (CVE-2021-1880, CVE-2021-1814, CVE-2021-30653, CVE-2021-1843)
* Out-of-bounds read issue were addressed with improved bounds checking.
(CVE-2021-1885)
* Out-of-bounds write issue were addressed with improved bounds
checking. (CVE-2021-1858)
* A use after free issue was addressed with improved memory management.
(CVE-2021-1864)
* A memory initialization issue was addressed with improved memory
handling. (CVE-2021-1860)
* A buffer overflow was addressed with improved bounds checking.
(CVE-2021-1816)
* A logic issue was addressed with improved state management.
(CVE-2021-1851)
* File permission issue was addressed with improved permissions logic.
(CVE-2021-1832)
* An out-of-bounds read was addressed with improved bounds checking.
(CVE-2021-30660)
* Root privilege condition was addressed with additional validation.
(CVE-2021-30652)
* A double free issue was addressed with improved memory management.
(CVE-2021-1875)
* A logic issue was addressed with improved restrictions. (CVE-2021-1822)
* A parsing issue in the handling of directory paths was addressed with
improved path validation.  (CVE-2021-1815, CVE-2021-1739, CVE-2021-1740)
* A validation issue was addressed with improved input sanitization.
(CVE-2021-1807)
* Privilege escalation issue was addressed with improved state
management. (CVE-2021-1868)
* A cross site scripting vulnerability was addressed with improved input
validation. (CVE-2021-1825)
* A memory corruption issue was addressed with improved state
management. (CVE-2021-1817)
* A logic issue was addressed with improved restrictions. (CVE-2021-1826)
* A memory initialization issue was addressed with improved memory
handling. (CVE-2021-1820)
* Arbitrary code execution issue was addressed with improved memory
management. (CVE-2021-30661)

macOS Big Sur 11.3
* Privilege escalation was addressed with improved state management.
(CVE-2021-1853)
* An issue in code signature validation was addressed with improved
checks. (CVE-2021-1849)
* An out-of-bounds read was addressed with improved input validation.
(CVE-2021-1867)
* A logic issue was addressed with improved state management.
(CVE-2021-1810)
* A memory corruption issue was addressed with improved validation.
(CVE-2021-1808)
* A memory initialization issue was addressed with improved memory
handling. (CVE-2021-1857)
* An out-of-bounds read was addressed with improved input validation.
(CVE-2021-1846)
* A memory corruption issue was addressed with improved validation.
(CVE-2021-1809)
* A validation issue was addressed with improved logic. (CVE-2021-30659)
* Arbitrary code execution or unexpected application termination issue
was addressed with improved validation. (CVE-2021-1847)
* Disclosure of process memory issue was addressed with improved state
management. (CVE-2021-1811)
* Fraudulent OCSP response issue was addressed with improved checks.
(CVE-2021-8286)
* A buffer overflow was addressed with improved input validation.
(CVE-2021-8285)
* A permissions issue existed in DiskArbitration. This was addressed
with additional ownership checks. (CVE-2021-1784)
* A logic issue was addressed with improved state management.
(CVE-2021-1872)
* An out-of-bounds read was addressed with improved input validation.
(CVE-2021-1881)
* A memory corruption issue was addressed with improved validation.
(CVE-2021-1882)
* A validation issue was addressed with improved logic. (CVE-2021-1813)
* Heap corruption issue was addressed with improved checks. (CVE-2021-1883)
* A denial of service condition was addressed with improved locking.
(CVE-2021-1884)
* Processing of maliciously crafted image was addressed with improved
checks. (CVE-2021-1880, CVE-2021-1814, CVE-2021-30653, CVE-2021-1843)
* Out-of-bounds read issue were addressed with improved bounds checking.
(CVE-2021-1885)
* Out-of-bounds write issue were addressed with improved bounds
checking. (CVE-2021-1858)
* An out-of-bounds write issue was addressed with improved bounds
checking. (CVE-2021-1841, CVE-2021-1834)
* A memory initialization issue was addressed with improved memory
handling. (CVE-2021-1860)
* A memory corruption issue was addressed with improved validation.
(CVE-2021-1840)
* A logic issue was addressed with improved state management.
(CVE-2021-1851)
* File permission issue was addressed with improved permissions logic.
(CVE-2021-1832)
* An out-of-bounds read was addressed with improved bounds checking.
(CVE-2021-30660)
* Root privilege condition was addressed with additional validation.
(CVE-2021-30652)
* A double free issue was addressed with improved memory management.
(CVE-2021-1875)
* Access to privilege information was addressed with improved
entitlements. (CVE-2021-1824)
* Unexpected lock issue was addressed with improved state management.
(CVE-2021-1859)
* Arbitrary code execution issue was addressed with improved memory
management. (CVE-2021-1876)
* A parsing issue in the handling of directory paths was addressed with
improved path validation.  (CVE-2021-1815, CVE-2021-1739, CVE-2021-1740)
* An issue existed in determining cache occupancy. The issue was
addressed through improved logic. (CVE-2021-1861)
* Favicon network connection issue was addressed with improved state
management. (CVE-2021-1855)
* Privilege escalation issue was addressed with improved state
management. (CVE-2021-1868)
* An integer overflow was addressed with improved input validation.
(CVE-2021-1878)
* A logic issue was addressed with improved state management.
(CVE-2021-30657)
* A denial of service issue was addressed with improved checks.
(CVE-2020-8037)
* Privilege escalation issue was addressed with improved permissions
logic. (CVE-2021-1839)
* A cross site scripting vulnerability was addressed with improved input
validation. (CVE-2021-1825)
* A memory corruption issue was addressed with improved state
management. (CVE-2021-1817)
* A logic issue was addressed with improved restrictions. (CVE-2021-1826)
* A memory initialization issue was addressed with improved memory
handling. (CVE-2021-1820)
* Arbitrary code execution issue was addressed with improved memory
management. (CVE-2021-30661)
* Corrupt kernel memory or unexpected system termination issue was
addressed with improved memory management. (CVE-2020-7463)
* Write kernel memory or unexpected system termination issue was
addressed with improved validation. (CVE-2021-1828)
* Arbitrary code execution with kernel privileges issue was addressed
with improved state handling. (CVE-2021-1829)
* Arbitrary code with system privileges issue was addressed with
improved permissions logic. (CVE-2021-30655)
* An API issue in Accessibility TCC permissions was addressed with
improved state management. (CVE-2021-1873)

macOS Catalina:
* The issue was addressed with improved permissions logic. (CVE-2021-1797)
* A logic issue was addressed with improved state management.
(CVE-2021-1810)
* A memory corruption issue was addressed with improved validation.
(CVE-2021-1808)
* A memory initialization issue was addressed with improved memory
handling. (CVE-2021-1857)
* A memory corruption issue was addressed with improved validation.
(CVE-2021-1809)
* A memory corruption issue was addressed with improved validation.
(CVE-2021-1847)
* A logic issue was addressed with improved state management.
(CVE-2021-1811)
* A buffer overflow was addressed with improved input validation.
(CVE-2020-8285)
* This issue was addressed with improved checks. (CVE-2020-8286)
* A permissions issue existed in DiskArbitration. This was addressed
with additional ownership checks. (CVE-2021-1784)
* An out-of-bounds read was addressed with improved input validation.
(CVE-2021-1881)
* A logic issue was addressed with improved state management.
(CVE-2020-27942)
* A validation issue was addressed with improved logic. (CVE-2021-1813)
* A memory corruption issue was addressed with improved validation.
(CVE-2021-1882)
* This issue was addressed with improved checks. (CVE-2021-1843)
* An out-of-bounds write issue was addressed with improved bounds
checking. (CVE-2021-1834)
* A memory initialization issue was addressed with improved memory
handling. (CVE-2021-1860)
* A logic issue was addressed with improved state management.
(CVE-2021-1851)
* A memory corruption issue was addressed with improved validation.
(CVE-2021-1840)
* A race condition was addressed with additional validation.
(CVE-2021-30652)
* A double free issue was addressed with improved memory management.
(CVE-2021-1875)
* This issue was addressed with improved entitlements. (CVE-2021-1824)
* A use after free issue was addressed with improved memory management.
(CVE-2021-1824)
* A parsing issue in the handling of directory paths was addressed with
improved path validation. (CVE-2021-1739, CVE-2021-1740)
* An integer overflow was addressed with improved input validation.
(CVE-2021-1878)
* A logic issue was addressed with improved state management.
(CVE-2021-1868)
* This issue was addressed with improved checks. (CVE-2020-8037)
* The issue was addressed with improved permissions logic. (CVE-2021-1839)
* A memory corruption issue was addressed with improved validation.
(CVE-2021-1828)
* The issue was addressed with improved permissions logic. (CVE-2020-3838)
* An API issue in Accessibility TCC permissions was addressed with
improved state management. (CVE-2021-1873)

macOS Mojave:
* The issue was addressed with improved permissions logic. (CVE-2021-1797)
* A memory corruption issue was addressed with improved validation.
(CVE-2021-1808)
* A memory corruption issue was addressed with improved validation.
(CVE-2021-1809)
* A memory corruption issue was addressed with improved validation.
(CVE-2021-1847)
* A buffer overflow was addressed with improved input validation.
(CVE-2020-8285)
* This issue was addressed with improved checks. (CVE-2020-8256)
* A permissions issue existed in DiskArbitration. This was addressed
with additional ownership checks. (CVE-2021-1784)
* An out-of-bounds read was addressed with improved input validation.
(CVE-2021-1881)
* A logic issue was addressed with improved state management.
(CVE-2020-27942)
* A validation issue was addressed with improved logic. (CVE-2021-1813)
* This issue was addressed with improved checks. (CVE-2021-1843)
* An out-of-bounds write was addressed with improved input validation.
(CVE-2021-1805)
* A race condition was addressed with additional validation. (CVE-2021-1806)
* An out-of-bounds write issue was addressed with improved bounds
checking. (CVE-2021-1834)
* A memory initialization issue was addressed with improved memory
handling. (CVE-2021-1860)
* A logic issue was addressed with improved state management.
(CVE-2021-1851)
* A memory corruption issue was addressed with improved validation.
(CVE-2021-1840)
* A race condition was addressed with additional validation.
(CVE-2021-30652)
* A double free issue was addressed with improved memory management.
(CVE-2021-1875)
* A use after free issue was addressed with improved memory management.
(CVE-2021-1876)
* A parsing issue in the handling of directory paths was addressed with
improved path validation. (CVE-2021-1739)
* An integer overflow was addressed with improved input validation.
(CVE-2021-1878)
* A logic issue was addressed with improved state management.
(CVE-2021-1868)
* This issue was addressed with improved checks. (CVE-2020-8037)
* The issue was addressed with improved permissions logic. (CVE-2021-1839)
* A memory corruption issue was addressed with improved validation.
(CVE-2021-1828)
* The issue was addressed with improved permissions logic. (CVE-2020-3838)
* An API issue in Accessibility TCC permissions was addressed with
improved state management. (CVE-2021-1873)

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.

SYSTEM AFFECTED:
* iCloud for Windows prior to version 12.3
* Xcode prior to version 12.5
* Safari prior to version 14.1
* macOS Big Sur prior to version 11.3
* macOS Catalina prior to security update 2021-002
* macOS Mojave prior to security update 2021-003
* iOS prior to version 14.5
* iPadOS prior to version 14.5
* watchOS prior to version 7.4
* tvOS prior to version 14.5
* iTunes prior to version 12.11.3
* GarageBand prior to version 10.4.3

RECOMMENDATIONS:
We recommend the following actions be taken:
* Apply appropriate patches provided by Apple to vulnerable systems
immediately after appropriate testing.
* Run all software as a nonprivileged user (one without administrative
privileges) to diminish the effects of a successful attack.
* Remind users not to download, accept or execute files from untrusted
and unknown sources.
* Remind users not to visit untrusted websites or follow links provided
by untrusted or unknown sources.
* Evaluate read, write, and execute permissions on all newly installed
software.
* Apply the Principle of Least Privilege to all systems and services.

REFERENCES:
https://support.apple.com/en-us/HT201222
https://support.apple.com/en-us/HT212299
https://support.apple.com/en-us/HT212317
https://support.apple.com/en-us/HT212318
https://support.apple.com/en-us/HT212319
https://support.apple.com/en-us/HT212320
https://support.apple.com/en-us/HT212321
https://support.apple.com/en-us/HT212323
https://support.apple.com/en-us/HT212324
https://support.apple.com/en-us/HT212325
https://support.apple.com/en-us/HT212326
https://support.apple.com/en-us/HT212327