Apple iOS up to 11.4.0 WebKit input validation

Summaryinfo

A vulnerability was found in Apple iOS up to 11.4.0. It has been rated as critical. The affected element is an unknown function of the component WebKit. The manipulation leads to input validation. This vulnerability is referenced as CVE-2018-4274. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Apple iOS up to 11.4.0 (Smartphone Operating System). It has been rated as critical. This issue affects an unknown function of the component WebKit. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is confidentiality, and integrity. The summary by CVE is:

A spoofing issue existed in the handling of URLs. This issue was addressed with improved input validation. This issue affected versions prior to iOS 11.4.1, Safari 11.1.2.

The bug was discovered 07/09/2018. The weakness was published 07/09/2018 as HT208938 as confirmed advisory (Website). It is possible to read the advisory at support.apple.com. The identification of this vulnerability is CVE-2018-4274 since 01/02/2018. The attack may be initiated remotely. No form of authentication is needed for a successful 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 pricing 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 spoofing issue existed in the handling of URLs. This issue was addressed with improved input validation.

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 371059 (Apple Safari 11.1.2 Not Installed (APPLE-SA-2018-7-9-5)).

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). Similar entries are available at VDB-120972, VDB-120960, VDB-120961 and VDB-120962. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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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CPE 2.2info

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Entryinfo

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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