Apple Safari up to 11.1.1 WebKit Page Loading input validation

Summaryinfo

A vulnerability identified as critical has been detected in Apple Safari up to 11.1.1. Affected by this issue is some unknown functionality of the component WebKit Page Loading. The manipulation leads to input validation. This vulnerability is uniquely identified as CVE-2018-4260. The attack is possible to be carried out remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Apple Safari up to 11.1.1 (Web Browser). It has been rated as critical. This issue affects some unknown functionality of the component WebKit Page Loading. 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:

An inconsistent user interface issue was addressed with improved state management. This issue affected versions prior to iOS 11.4.1, Safari 11.1.2.

The bug was discovered 07/09/2018. The weakness was disclosed 07/09/2018 with Tencent as HT208934 as confirmed advisory (Website). It is possible to read the advisory at support.apple.com. The identification of this vulnerability is CVE-2018-4260 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 advisory points out:

An inconsistent user interface issue was addressed with improved state management.

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

Productinfo

Type

• Web Browser

Vendor

• Apple

Name

• Safari

Version

• 11.1.0
• 11.1.1

License

• commercial

Website

• Vendor: https://www.apple.com/

CPE 2.3info

• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

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

Discussion