CVE-2018-4284: Incorrect Type Cast

Q: What is CVE-2018-4284?

CVE-2018-4284 is a type confusion vulnerability in WebKit that has been fixed in iOS 11.4.1, tvOS 11.4.1, watchOS 4.3.2, Safari 11.1.2, iTunes 12.8 for Windows, and iCloud for Windows 7.6.

Q: How severe is CVE-2018-4284?

CVE-2018-4284 has a severity score of 8.8, which is considered high.

Q: Which software versions are affected by CVE-2018-4284?

Versions prior to iOS 11.4.1, tvOS 11.4.1, watchOS 4.3.2, Safari 11.1.2, iTunes 12.8 for Windows, and iCloud for Windows 7.6 are affected by CVE-2018-4284.

Q: How do I fix CVE-2018-4284?

To fix CVE-2018-4284, update to iOS 11.4.1 or later, tvOS 11.4.1 or later, watchOS 4.3.2 or later, Safari 11.1.2 or later, iTunes 12.8 or later for Windows, and iCloud for Windows 7.6 or later.

Q: Where can I find more information about CVE-2018-4284?

You can find more information about CVE-2018-4284 at the following references: [link1](https://support.apple.com/en-us/HT208933), [link2](https://support.apple.com/en-us/HT208934), [link3](https://support.apple.com/en-us/HT208938).

Published Jul 9, 2018

Updated

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.

Other sources

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

Credit

found by OSS-Fuzz

Affected Software

18 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 tvOS<11.4.1

11.4.1

Apple WatchOS<4.3.2

4.3.2

Apple iCloud for Windows<7.6

7.6

Apple iTunes for Windows<12.8

12.8

Apple Safari<11.1.2

11.1.2

Apple iOS<11.4.1

11.4.1

Apple Safari<11.1.2

Apple iPhone OS<11.4.1

Apple tvOS<11.4.1

Apple WatchOS<4.3.2

All of the following

Any of the following

Apple iCloud<7.6

Apple iTunes<12.8

Microsoft Windows

Apple iCloud<7.6

Apple iTunes<12.8

Microsoft Windows

alpine/webkit2gtk<2.20.4-r0

2.20.4-r0

Remediation

Recommended actions to resolve this vulnerability, in priority order.

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
Upgrade
Upgrade tvOS to a version that resolves this vulnerability.
Fixed in 11.4.1
Upgrade
Upgrade Apple iOS, iPadOS, and watchOS to a version that resolves this vulnerability.
Fixed in 4.3.2
Upgrade
Upgrade Apple iCloud to a version that resolves this vulnerability.
Fixed in 7.6
Upgrade
Upgrade iTunes to a version that resolves this vulnerability.
Fixed in 12.8
Upgrade
Upgrade Safari to a version that resolves this vulnerability.
Fixed in 11.1.2
Upgrade
Upgrade Apple iOS and iPadOS to a version that resolves this vulnerability.
Fixed in 11.4.1
Upgrade
Upgrade alpine/webkit2gtk to a version that resolves this vulnerability.
Fixed in 2.20.4-r0
Upgrade
Upgrade iOS to a version that resolves this vulnerability.
Fixed in 11.4.1
Upgrade
Upgrade watchOS to a version that resolves this vulnerability.
Fixed in 4.3.2
Upgrade
Upgrade iTunes for Windows to a version that resolves this vulnerability.
Fixed in 12.8
Upgrade
Upgrade iCloud for Windows to a version that resolves this vulnerability.
Fixed in 7.6

Event History

Apr 3, 2019

CVE Published

via MITRE·05:43 PM

Data Sourced

via MITRE·05:43 PM

DescriptionWeakness

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

What is CVE-2018-4284?