Apple iOS up to 11.4.0 WebKit memory corruption

Summaryinfo

A vulnerability has been found in Apple iOS up to 11.4.0 and classified as critical. Impacted is an unknown function of the component WebKit. Performing a manipulation results in memory corruption. This vulnerability is known as CVE-2018-4271. Remote exploitation of the attack is possible. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical has been found in Apple iOS up to 11.4.0 (Smartphone Operating System). This affects an unknown part of the component WebKit. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Multiple memory corruption issues were addressed with improved input validation. 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 HT208938 as confirmed advisory (Website). The advisory is shared at support.apple.com. This vulnerability is uniquely identified as CVE-2018-4271 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. 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:

Multiple memory corruption issues were 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 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). Similar entries are available at VDB-120972, VDB-120960, VDB-120961 and VDB-120962. 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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