CVE-2018-4246: Incorrect Type Cast

Published May 29, 2018
·
Updated

An issue was discovered in certain Apple products. iOS before 11.4 is affected. Safari before 11.1.1 is affected. iCloud before 7.5 on Windows is affected. iTunes before 12.7.5 on Windows is affected. tvOS before 11.4 is affected. watchOS before 4.3.1 is affected. The issue involves the "WebKit" component. It allows remote attackers to execute arbitrary code via a crafted web site that leverages type confusion.

Other sources

WebKit. A type confusion issue was addressed with improved memory handling.

Credit

found by OSS-Fuzz

Affected Software

16 affected componentsFixes available
debian/webkit2gtk
2.44.2-1~deb11u12.44.3-1~deb11u12.44.2-1~deb12u12.44.3-1~deb12u12.46.0-22.46.1-1
Apple iTunes for Windows<12.7.5
12.7.5
Apple Safari<11.1.1
Apple iPhone OS<11.4
Apple tvOS<11.4
Apple WatchOS<4.3.1
All of the following
Apple iCloud<7.5
Microsoft Windows
All of the following
Apple iTunes<12.7.5
Microsoft Windows
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=18.04
Apple iCloud<7.5
Microsoft Windows
Apple iTunes<12.7.5
alpine/webkit2gtk<2.20.4-r0
2.20.4-r0

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade debian/webkit2gtk to a version that resolves this vulnerability.

    Fixed in 2.44.2-1~deb11u1Fixed in 2.44.3-1~deb11u1Fixed in 2.44.2-1~deb12u1Fixed in 2.44.3-1~deb12u1Fixed in 2.46.0-2Fixed in 2.46.1-1
  2. Upgrade

    Upgrade iTunes to a version that resolves this vulnerability.

    Fixed in 12.7.5
  3. Upgrade

    Upgrade alpine/webkit2gtk to a version that resolves this vulnerability.

    Fixed in 2.20.4-r0
  4. Upgrade

    Upgrade Safari to a version that resolves this vulnerability.

    Fixed in 11.1.1
  5. Upgrade

    Upgrade iCloud for Windows to a version that resolves this vulnerability.

    Fixed in 7.5
  6. Upgrade

    Upgrade iOS to a version that resolves this vulnerability.

    Fixed in 11.4
  7. Upgrade

    Upgrade iTunes for Windows to a version that resolves this vulnerability.

    Fixed in 12.7.5
  8. Upgrade

    Upgrade tvOS to a version that resolves this vulnerability.

    Fixed in 11.4
  9. Upgrade

    Upgrade watchOS to a version that resolves this vulnerability.

    Fixed in 4.3.1

Event History

Jun 8, 2018
CVE Published
via MITRE·06:00 PM
Data Sourced
via MITRE·06:00 PM
Description
Data Sourced
via OSV·06:29 PM
DescriptionSeverityAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What is CVE-2018-4246?

CVE-2018-4246 is a type confusion issue in WebKit.

2

Which Apple products are affected by CVE-2018-4246?

iOS before 11.4, Safari before 11.1.1, iCloud before 7.5 on Windows, iTunes before 12.7.5 on Windows, tvOS before 11.4, and watchOS before 4.3.1 are affected.

3

What is the severity of CVE-2018-4246?

CVE-2018-4246 has a severity score of 8.8, which is considered high.

4

How can I fix CVE-2018-4246?

Apply the recommended updates or patches provided by Apple or your operating system vendor.

5

Where can I find more information about CVE-2018-4246?

You can find more information about CVE-2018-4246 at the following references: [1] [2]

Company

Resources

Contact

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