Apple iOS up to 11.4.0 WebKit type conversion

Summaryinfo

A vulnerability identified as critical has been detected in Apple iOS up to 11.4.0. This affects an unknown function of the component WebKit. This manipulation causes type conversion. This vulnerability is tracked as CVE-2018-4284. The attack is possible to be carried out remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Apple iOS up to 11.4.0 (Smartphone Operating System). Affected by this vulnerability is some unknown functionality of the component WebKit. The manipulation with an unknown input leads to a type conversion vulnerability. The CWE definition for the vulnerability is CWE-704. The product does not correctly convert an object, resource, or structure from one type to a different type. As an impact it is known to affect 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 disclosed 07/09/2018 as HT208938 as confirmed advisory (Website). The advisory is shared at support.apple.com. This vulnerability is known as CVE-2018-4284 since 01/02/2018. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 02/29/2020). It is expected to see the exploit prices for this product increasing in the near future. 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 11.4.1 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). The entries VDB-120972, VDB-120960, VDB-120961 and VDB-120962 are pretty similar. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Smartphone Operating System

Vendor

• Apple

Name

• iOS

Version

• 11.0
• 11.1
• 11.2
• 11.3
• 11.4.0

License

• commercial

Website

• Vendor: https://www.apple.com/

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Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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