Multiple Vulnerabilities in Apple Products Could Allow for Arbitrary Code Execution

DESCRIPTION

Multiple vulnerabilities have been discovered in iOS, iPadOS, macOS, tvOS, watchOS, and Safari. The most severe of these vulnerabilities could allow for arbitrary code execution.

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 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. Successful exploitation of these vulnerabilities could allow the attacker to execute remote code on the affected system.

IMPACT

Multiple vulnerabilities have been discovered in iOS, iPadOS, macOS, tvOS, watchOS, and iTunes. The most severe of these vulnerabilities could allow for arbitrary code execution. Details of these vulnerabilities are as follows:

• An out-of-bounds write issue was addressed with improved bounds checking. (CVE-2020-9872)
• An out-of-bounds read was addressed with improved input validation. (CVE-2020-9873, CVE-2020-9938)
• A buffer overflow issue was addressed with improved memory handling. (CVE-2020-9919)
• An out-of-bounds write issue was addressed with improved bounds checking. (CVE-2020-9871, CVE-2020-9874, CVE-2020-9879, CVE-2020-9937, CVE-2020-9876)
• An out-of-bounds read was addressed with improved bounds checking. (CVE-2020-9877)
• An integer overflow was addressed through improved input validation. (CVE-2020-9875)
• A buffer overflow issue was addressed with improved memory handling. (CVE-2020-9878, CVE-2020-9883)
• A buffer overflow was addressed with improved bounds checking. (CVE-2020-9866)
• A command injection issue existed in Web Inspector. This issue was addressed with improved escaping. (CVE-2020-9862)
• A denial of service issue was addressed with improved input validation. (CVE-2020-9931)
• A logic issues were addressed with improved restrictions. (CVE-2020-9864, CVE-2020-9903, CVE-2020-9911, CVE-2020-9912)
• A logic issue was addressed with improved state management. (CVE-2020-9925)
• A logic issue was addressed with improved validation. (CVE-2020-9870)
• A memory corruption issues were addressed by removing the vulnerable code. (CVE-2020-9865, CVE-2020-9907)
• A memory corruption issue was addressed with improved memory handling. (CVE-2020-9923)
• An access issue existed in Content Security Policy. (CVE-2020-9915)
• An authorization issue was addressed with improved state management. (CVE-2020-9933)
• An input validation issue existed in Bluetooth. This issue was addressed with improved input validation. (CVE-2020-9914)
• An input validation issue was addressed. (CVE-2019-19906)
• An issue existed in the handling of environment variables. This issue was addressed with improved validation. (CVE-2020-9934)
• An issue existed in the handling of iMessage tapbacks. The issue was resolved with additional verification. (CVE-2020-9885)
• An out-of-bounds read was addressed with improved bounds checking. (CVE-2020-9799, CVE-2020-9888, CVE-2020-9890, CVE-2020-9891, CVE-2020-9909)
• An out-of-bounds read was addressed with improved input validation. (CVE-2020-9894, CVE-2020-9918)
• An out-of-bounds write issues were addressed with improved bounds checking. (CVE-2020-9884, CVE-2020-9889, CVE-2020-9936)
• A routing issue was addressed with improved restrictions. (CVE-2019-14899)
• A URL Unicode encoding issue was addressed with improved state management. (CVE-2020-9916)
• A use after free issue was addressed with improved memory management. (CVE-2020-9893, CVE-2020-9895)
• A remote attacker may be able to cause arbitrary code execution (CVE-2019-20807)
• A remote attacker may be able to cause a denial of service (CVE-2020-9917)
• A malicious attacker with arbitrary read and write capability may be able to bypass Pointer Authentication (CVE-2020-9910)
• Vulnerability may allow a remote attacker to cause arbitrary code execution. (CVE-2019-20807)
• Vulnerability may allow local user to leak sensitive user information (CVE-2020-9913)
• An issue existed within the path validation logic for symlinks. This issue was addressed with improved path sanitization. (CVE-2020-9900)
• A local user may be able to load unsigned kernel extensions. (CVE-2020-9939)

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 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. Successful exploitation of these vulnerabilities could allow the attacker to execute remote code on the affected system.

SYSTEM AFFECTED

• iOS prior to 13.6
• iPadOS prior to 13.6
• macOS prior to 10.15.6
• tvOS prior to 13.4.8
• watchOS prior to 6.2.8
• iTunes prior to 12.10.8

RECOMMENDATIONS

Following actions are recommended to be taken:

• Apply appropriate patches provided by Apple to vulnerable systems immediately after appropriate testing.
• 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.

REFERENCES