What’s Vulnerable › Vulnerabilities

CVE-2018-4117

• Severity: medium (CVSS 6.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-04-03 · updated 2026-06-17
• Weakness: CWE-200

Description

An issue was discovered in certain Apple products. iOS before 11.3 is affected. Safari before 11.1 is affected. iCloud before 7.4 on Windows is affected. iTunes before 12.7.4 on Windows is affected. watchOS before 4.3 is affected. The issue involves the fetch API in the "WebKit" component. It allows remote attackers to bypass the Same Origin Policy and obtain sensitive information via a crafted web site.

Affected products

• Apple iCloud for Windows: before 7.4 — fixed in 7.4
• Apple Iphone Os: before 11.3 — fixed in 11.3
• Apple iTunes for Windows: before 12.7.4 — fixed in 12.7.4
• Apple Safari: before 11.1 — fixed in 11.1
• Apple watchOS: before 4.3 — fixed in 4.3
• Canonical Ubuntu Linux: 16.04, 17.10
• Debian Linux: 9.0
• RedHat Enterprise Linux Desktop: 6.0
• RedHat Enterprise Linux Server: 6.0
• RedHat Enterprise Linux Workstation: 6.0
• Webkitgtk+: before 2.20.4 — fixed in 2.20.4

How to fix

Upgrade to a fixed version: Apple iCloud for Windows 7.4; Apple Iphone Os 11.3; Apple iTunes for Windows 12.7.4; Apple Safari 11.1; Apple watchOS 4.3; Webkitgtk+ 2.20.4. Check the vendor advisory for mitigations.

References

• http://www.securityfocus.com/bid/104887
• http://www.securitytracker.com/id/1040604
• https://access.redhat.com/errata/RHSA-2018:2282
• https://security.gentoo.org/glsa/201808-01
• https://security.gentoo.org/glsa/201808-04
• https://support.apple.com/HT208693
• https://support.apple.com/HT208694
• https://support.apple.com/HT208695
• https://support.apple.com/HT208696
• https://support.apple.com/HT208697
• https://usn.ubuntu.com/3635-1/
• https://www.debian.org/security/2018/dsa-4256

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