medium
6.5
CWE
20 119
Advisory Published
CVE Published
Updated

CVE-2018-4271: Input Validation

First published: Mon Jul 09 2018(Updated: )

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.

Credit: found by OSS-Fuzz found by OSS-Fuzz found by OSS-Fuzz found by OSS-Fuzz found by OSS-Fuzz found by OSS-Fuzz found by OSS-Fuzz found by OSS-Fuzz found by OSS-Fuzz found by OSS-Fuzz found by OSS-Fuzz found by OSS-Fuzz product-security@apple.com

Affected SoftwareAffected VersionHow to fix
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 watchOS<4.3.2
4.3.2
Apple tvOS<11.4.1
11.4.1
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
Apple iCloud<7.6
Apple iTunes<12.8
Microsoft Windows

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Peer vulnerabilities

(Found alongside the following vulnerabilities)

Frequently Asked Questions

  • What is CVE-2018-4271?

    CVE-2018-4271 is a vulnerability in WebKit that leads to multiple memory corruption issues due to improved input validation.

  • Which software versions are affected by CVE-2018-4271?

    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 are affected by CVE-2018-4271.

  • What is the severity of CVE-2018-4271?

    CVE-2018-4271 has a severity rating of 6.5, which is considered medium.

  • How can I fix CVE-2018-4271?

    To fix CVE-2018-4271, you should update your software 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.

  • Where can I find more information about CVE-2018-4271?

    You can find more information about CVE-2018-4271 on the Apple Support website: [https://support.apple.com/en-us/HT208936](https://support.apple.com/en-us/HT208936), [https://support.apple.com/en-us/HT208932](https://support.apple.com/en-us/HT208932), [https://support.apple.com/en-us/HT208935](https://support.apple.com/en-us/HT208935).

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