CVE-2018-4273: Input Validation

Q: What is CVE-2018-4273?

CVE-2018-4273 is a vulnerability in WebKit that allows for multiple memory corruption issues due to improved input validation.

Q: Which versions are affected by CVE-2018-4273?

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-2018-4273.

Q: What is the severity of CVE-2018-4273?

CVE-2018-4273 has a severity rating of 6.5 (medium).

Q: How do I fix CVE-2018-4273 on Ubuntu?

To fix CVE-2018-4273 on Ubuntu, update to version 2.20.5-0ubuntu0.18.04.1 for Ubuntu 18.04, version 2.20.5-0ubuntu0.16.04.1 for Ubuntu 16.04, or version 2.20.4 for upstream.

Q: How do I fix CVE-2018-4273 on Apple products?

To fix CVE-2018-4273 on Apple products, update to the following versions: iOS 11.4.1, tvOS 11.4.1, watchOS 4.3.2, Safari 11.1.2, or iTunes 12.8 for Windows.

Published Jul 9, 2018

Updated

Last updated 24 July 2024

Other sources

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.

— Launchpad

WebKit. Multiple memory corruption issues were addressed with improved input validation.

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 to a fixed release to a version that resolves this vulnerability.
Fixed in iOS 11.4.1
Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in tvOS 11.4.1
Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in watchOS 4.3.2
Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in Safari 11.1.2
Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in iTunes 12.8 for Windows
Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in iCloud for Windows 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-2018-4273?