CVE-2018-4218: Use After Free

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 or cause a denial of service (memory corruption and application crash) via a crafted web site that triggers an @generatorState use-after-free.

Other sources

WebKit. Multiple memory corruption issues were addressed with improved memory handling.

Credit

an anonymous researcher, natashenka(Google Project Zero), Samuel Groß@@5aelo(Trend Micro)

Affected Software

16 affected componentsFixes available
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
Apple iCloud<7.5
Microsoft Windows
Apple iTunes<12.7.5
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=17.10
Canonical Ubuntu Linux=18.04
debian/webkit2gtk
2.44.2-1~deb11u12.50.4-1~deb11u12.50.4-1~deb12u12.50.4-1~deb13u12.50.5-1
All of the following
Apple iCloud<7.5
Microsoft Windows
All of the following
Apple iTunes<12.7.5
Microsoft Windows

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade iTunes to a version that resolves this vulnerability.

    Fixed in 12.7.5
  2. Upgrade

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

    Fixed in 2.44.2-1~deb11u1Fixed in 2.50.4-1~deb11u1Fixed in 2.50.4-1~deb12u1Fixed in 2.50.4-1~deb13u1Fixed in 2.50.5-1
  3. Upgrade

    Upgrade Apple Safari to a version that resolves this vulnerability.

    Fixed in 11.1.1
  4. Upgrade

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

    Fixed in 7.5
  5. Upgrade

    Upgrade Apple iOS to a version that resolves this vulnerability.

    Fixed in 11.4
  6. Upgrade

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

    Fixed in 12.7.5
  7. Upgrade

    Upgrade Apple tvOS to a version that resolves this vulnerability.

    Fixed in 11.4
  8. Upgrade

    Upgrade Apple 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 NVD·06:29 PM
DescriptionSeverityWeaknessAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What is the severity of CVE-2018-4218?

The severity of CVE-2018-4218 is high, with a severity value of 8.8.

2

What products are affected by CVE-2018-4218?

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 by CVE-2018-4218.

3

How can I fix CVE-2018-4218?

Update to the latest available version of iOS, Safari, iCloud, iTunes, tvOS, and watchOS to fix CVE-2018-4218.

4

Are Ubuntu Linux versions affected by CVE-2018-4218?

Yes, Ubuntu Linux versions 16.04, 17.10, and 18.04 are affected by CVE-2018-4218.

5

Where can I find more information about CVE-2018-4218?

You can find more information about CVE-2018-4218 at the following references: [1] [2] [3]

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203