What’s Vulnerable › Vulnerabilities

CVE-2018-4190

• Severity: high (CVSS 8.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-06-08 · updated 2026-06-17
• Weakness: CWE-522

Description

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. The issue involves the "WebKit" component. It allows remote attackers to obtain sensitive credential information that is transmitted during a CSS mask-image fetch.

Affected products

• Apple iCloud for Windows: before 7.5 — fixed in 7.5
• Apple Iphone Os: before 11.4 — fixed in 11.4
• Apple iTunes for Windows: before 12.7.5 — fixed in 12.7.5
• Apple Safari: before 11.1.1 — fixed in 11.1.1
• Apple tvOS: before 11.4 — fixed in 11.4
• Canonical Ubuntu Linux: 16.04, 17.10, 18.04

How to fix

Upgrade to a fixed version: Apple iCloud for Windows 7.5; Apple Iphone Os 11.4; Apple iTunes for Windows 12.7.5; Apple Safari 11.1.1; Apple tvOS 11.4. Check the vendor advisory for mitigations.

References

• http://www.securitytracker.com/id/1041029
• https://security.gentoo.org/glsa/201808-04
• https://support.apple.com/HT208848
• https://support.apple.com/HT208850
• https://support.apple.com/HT208852
• https://support.apple.com/HT208853
• https://support.apple.com/HT208854
• https://usn.ubuntu.com/3687-1/
• http://www.securitytracker.com/id/1041029
• https://security.gentoo.org/glsa/201808-04
• https://support.apple.com/HT208848
• https://support.apple.com/HT208850

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