About the security content of watchOS 5.1.2

This document describes the security content of watchOS 5.1.2.

About Apple security updates

For our customers' protection, Apple doesn't disclose, discuss, or confirm security issues until an investigation has occurred and patches or releases are available. Recent releases are listed on the Apple security updates page.

For more information about security, see the Apple Product Security page. You can encrypt communications with Apple using the Apple Product Security PGP Key.

Apple security documents reference vulnerabilities by CVE-ID when possible.

watchOS 5.1.2

Airport

Available for: Apple Watch Series 1 and later

Impact: A malicious application may be able to elevate privileges

Description: A type confusion issue was addressed with improved memory handling.

CVE-2018-4303: Mohamed Ghannam (@_simo36)

Disk Images

Available for: Apple Watch Series 1 and later

Impact: An application may be able to execute arbitrary code with kernel privileges

Description: A memory corruption issue was addressed with improved memory handling.

CVE-2018-4427: Pangu Team

Kernel

Available for: Apple Watch Series 1 and later

Impact: A local user may be able to read kernel memory

Description: A memory initialization issue was addressed with improved memory handling.

CVE-2018-4431: An independent security researcher has reported this vulnerability to Beyond Security’s SecuriTeam Secure Disclosure program

CVE-2018-4448: Brandon Azad

Kernel

Available for: Apple Watch Series 1 and later

Impact: An attacker in a privileged position may be able to perform a denial of service attack

Description: A denial of service issue was addressed by removing the vulnerable code.

CVE-2018-4460: Kevin Backhouse of Semmle Security Research Team

Kernel

Available for: Apple Watch Series 1 and later

Impact: A local user may be able to read kernel memory

Description: A memory initialization issue was addressed with improved memory handling.

CVE-2018-4431: An independent security researcher has reported this vulnerability to Beyond Security’s SecuriTeam Secure Disclosure program

Kernel

Available for: Apple Watch Series 1 and later

Impact: An application may be able to execute arbitrary code with kernel privileges

Description: A memory corruption issue was addressed with improved state management.

CVE-2018-4447: Juwei Lin(@panicaII) and Zhengyu Dong of TrendMicro Mobile Security Team working with Trend Micro's Zero Day Initiative

Kernel

Available for: Apple Watch Series 1 and later

Impact: A malicious application may be able to elevate privileges

Description: A logic issue was addressed with improved restrictions.

CVE-2018-4435: Jann Horn of Google Project Zero, Juwei Lin(@panicaII) and Junzhi Lu of TrendMicro Mobile Security Team working with Trend Micro's Zero Day Initiative

Kernel

Available for: Apple Watch Series 1 and later

Impact: An application may be able to execute arbitrary code with kernel privileges

Description: A memory corruption issue was addressed with improved input validation.

CVE-2018-4461: Ian Beer of Google Project Zero

LinkPresentation

Available for: Apple Watch Series 1 and later

Impact: Processing a maliciously crafted email may lead to user interface spoofing

Description: A spoofing issue existed in the handling of URLs. This issue was addressed with improved input validation.

CVE-2018-4429: Victor Le Pochat of imec-DistriNet, KU Leuven

Profiles

Available for: Apple Watch Series 1 and later

Impact: An untrusted configuration profile may be incorrectly displayed as verified

Description: A certificate validation issue existed in configuration profiles. This was addressed with additional checks.

CVE-2018-4436: James Seeley @Code4iOS, Joseph S. of JJS Securities

WebKit

Available for: Apple Watch Series 1 and later

Impact: Processing maliciously crafted web content may lead to arbitrary code execution

Description: Multiple memory corruption issues were addressed with improved memory handling.

CVE-2018-4437: HyungSeok Han, DongHyeon Oh, and Sang Kil Cha of KAIST Softsec Lab, Korea

CVE-2018-4464: HyungSeok Han, DongHyeon Oh, and Sang Kil Cha of KAIST Softsec Lab, Korea

WebKit

Available for: Apple Watch Series 1 and later

Impact: Processing maliciously crafted web content may lead to arbitrary code execution

Description: A memory corruption issue was addressed with improved memory handling.

CVE-2018-4441: lokihardt of Google Project Zero

CVE-2018-4442: lokihardt of Google Project Zero

CVE-2018-4443: lokihardt of Google Project Zero

WebKit

Available for: Apple Watch Series 1 and later

Impact: Processing maliciously crafted web content may lead to arbitrary code execution

Description: A logic issue existed resulting in memory corruption. This was addressed with improved state management.

CVE-2018-4438: lokihardt of Google Project Zero, Qixun Zhao of Qihoo 360 Vulcan Team