Apple iCloud up to 7.5 on Windows WebKit type conversion

Summaryinfo

A vulnerability, which was classified as critical, has been found in Apple iCloud up to 7.5 on Windows. This affects an unknown function of the component WebKit. Performing a manipulation results in type conversion. This vulnerability is known as CVE-2018-4284. Remote exploitation of the attack is possible. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Apple iCloud up to 7.5 on Windows (Cloud Software). It has been classified as critical. This affects an unknown functionality of the component WebKit. The manipulation with an unknown input leads to a type conversion vulnerability. CWE is classifying the issue as CWE-704. The product does not correctly convert an object, resource, or structure from one type to a different type. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

A type confusion issue was addressed with improved memory handling. This issue affected versions prior to iOS 11.4.1, tvOS 11.4.1, watchOS 4.3.2, Safari 11.1.2, iTunes 12.8 for Windows, iCloud for Windows 7.6.

The bug was discovered 07/09/2018. The weakness was published 07/09/2018 as HT208932 as confirmed advisory (Website). It is possible to read the advisory at support.apple.com. This vulnerability is uniquely identified as CVE-2018-4284 since 01/02/2018. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The advisory points out:

A type confusion issue was addressed with improved memory handling.

The vulnerability scanner Nessus provides a plugin with the ID 111109 (macOS : Apple Safari < 11.1.2 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family MacOS X Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 171580 (OpenSUSE Security Update for webkit2gtk3 (openSUSE-SU-2018:2781-1)).

Upgrading to version 7.6 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (111109). Similar entries are available at VDB-120972, VDB-120960, VDB-120961 and VDB-120962. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Cloud Software

Vendor

• Apple

Name

• iCloud

Version

• 7.0
• 7.1
• 7.2
• 7.3
• 7.4
• 7.5

License

• free

Website

• Vendor: https://www.apple.com/

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Be aware that VulDB is the high quality source for vulnerability data.

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