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iOS, iPadOS, tvOS, watchOS, and macOS contain an unspecified kernel vulnerability

Vulnerability Note VU#127371

Original Release Date: 2020-05-26 | Last Revised: 2020-06-03

Overview

iOS, iPadOS, tvOS, watchOS, and macOS contain an unspecified kernel vulnerability, which can allow a malicious application to achieve unsandboxed, kernel-level code execution.

Description

iOS, iPadOS, tvOS, watchOS, and macOS contain an unspecified kernel vulnerability. This vulnerability can allow code execution with kernel privileges. This vulnerability is being used by the public unc0ver 5.0 jailbreak utility, which claims to support all devices from iOS 11 through 13.5, excluding versions 12.3-12.3.2 and 12.4.2-12.4.5. It is also reported that this jailbreak works on modern iOS devices that use a CPU that supports Pointer Authentication Code (PAC), which indicates that PAC does not prevent exploitation of this vulnerability.

Impact

By convincing a user to run a malicious application on a device running iOS, iPadOS, tvOS, watchOS, or macOS, an attacker may be able to achieve arbitrary code execution in the kernel that is not restricted by sandboxes or other OS protections.

Solution

Apply updates

This issue is addressed in the following OS updates from Apple:
macOS Catalina 10.15.5 Supplemental Update, Security Update 2020-003 High Sierra
tvOS 13.4.6
watchOS 6.2.6
iOS 13.5.1 and iPadOS 13.5.1

Acknowledgements

This document was written by Will Dormann.

Vendor Information

127371
 

Apple Affected

Updated: 2020-06-19

CVE-2020-9859 Affected

Vendor Statement

We have not received a statement from the vendor.

References

CVSS Metrics

Group Score Vector
Base 7.2 AV:L/AC:L/Au:N/C:C/I:C/A:C
Temporal 6.8 E:F/RL:U/RC:C
Environmental 6.8 CDP:ND/TD:H/CR:ND/IR:ND/AR:ND

Other Information

CVE IDs: CVE-2020-9859
Date Public: 2020-05-23
Date First Published: 2020-05-26
Date Last Updated: 2020-06-03 18:20 UTC
Document Revision: 22

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