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Apple Patches Dozens of Flaws in macOS, iOS, Safari

Apple has released a set of updates to address dozens of vulnerabilities in products including macOS, iOS, Safari, tvOS, watchOS, and iTunes and iCloud applications for Windows.

Apple has released a set of updates to address dozens of vulnerabilities in products including macOS, iOS, Safari, tvOS, watchOS, and iTunes and iCloud applications for Windows.

The newly released macOS High Sierra 10.13.5 includes patches for a total of 32 security vulnerabilities, impacting components such as Accessibility Framework, AMD, apache_mod_php, ATS, Bluetooth, FontParser, Graphics Drivers, Hypervisor, iBooks, Kernel, libxpc, Mail, Messages, Security, UIKit, and Windows Server.

Some of the addressed issues could lead to arbitrary code execution, kernel memory disclosure, privilege escalation, information disclosure, tampering with the EFI flash memory region, disclosure of restricted memory, spoofing of password prompts, denial of service, user tracking, modification of the state of the Keychain, and leaking of account and device identifiers.

The security updates are available for all macOS High Sierra 10.13.4 systems, as well as for machines running macOS Sierra 10.12.6 and OS X El Capitan 10.11.6 (as Security Update 2018-003 Sierra and Security Update 2018-003 El Capitan, respectively).

A total of 34 security bugs were addressed with the release of iOS 11.4, affecting Bluetooth, Contacts, FontParser, iBooks, Kernel, libxpc, Magnifier, Mail, Messages, Safari, Security, Siri, Siri Contacts, UIKit, and WebKit.

The vulnerabilities could result in elevation of privileges, denial of service, arbitrary code execution, password prompt spoofing, information disclosure, impersonation attacks, leaking of identifiers, leaking of private contact information, address bar spoofing, overwritten cookies, and unexpected Safari crashes.

One of the issue addressed in iOS, Sophos says, is related to the text rendering code in Apple’s products, which could not “switch left/right/left/right thousands of times in a row for no good reason at all.”

By sending a message that would require the application to make a large number of switches, the security researchers managed to cause the application to freeze and crash, but only before iOS 11.4 arrived with patches for two denial of service bugs: CVE-2018-4240 and CVE-2018-4250.  

Tracked a CVE-2018-4227, the vulnerability in Mail could allow an attacker to exfiltrate the contents of S/MIME-encrypted e-mail. Discovered by researchers from Münster University, Ruhr University Bochum, and KU Leuven, the issue existed in the handling of encrypted Mail and impacted macOS High Sierra 10.13.4 too.

Currently available for download as version 11.1.1, the latest Safari release includes patches for 13 security flaws that could result in denial of service, address bar spoofing, cookies being overwritten, arbitrary code execution, unexpected crashes, and the leaking of sensitive data.

The updated browser is available for OS X El Capitan 10.11.6, macOS Sierra 10.12.6, and macOS High Sierra 10.13.4 systems.

The security patches included in watchOS 4.3.1 resolve 20 issues in Crash Reporter, FontParser, Kernel, libxpc, Messages, Security, UIKit, and WebKit. tvOS 11.4, on the other hand, addresses 24 vulnerabilities in the same components.

Last week, Apple also released iTunes 12.7.5 for Windows, with patches for 16 vulnerabilities, along with iCloud for Windows 7.5, which includes patches for a similar number of security bugs.

Related: Apple Patches Dozens of Vulnerabilities Across Product Lines

Related: Apple Fixes Indian Character Crash Bug in iOS, macOS

Written By

Ionut Arghire is an international correspondent for SecurityWeek.

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