What’s Vulnerable › Vulnerabilities

CVE-2017-13903

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-12-25 · updated 2026-06-17

Description

An issue was discovered in certain Apple products. iOS before 11.2.1 is affected. tvOS before 11.2.1 is affected. The issue involves the "HomeKit" component. It allows remote attackers to modify the application state by leveraging incorrect message handling, as demonstrated by use of an Apple Watch to obtain an encryption key and unlock a door.

Affected products

• Apple Iphone Os: before 11.2.1 — fixed in 11.2.1
• Apple tvOS: before 11.2.1 — fixed in 11.2.1

How to fix

Upgrade to a fixed version: Apple Iphone Os 11.2.1; Apple tvOS 11.2.1. Check the vendor advisory for mitigations.

References

• http://www.securityfocus.com/bid/102182
• http://www.securitytracker.com/id/1040008
• https://support.apple.com/HT208357
• https://support.apple.com/HT208359
• https://www.engadget.com/2017/12/21/apple-ignored-a-major-homekit-security-flaw-for-six-weeks/
• http://www.securityfocus.com/bid/102182
• http://www.securitytracker.com/id/1040008
• https://support.apple.com/HT208357
• https://support.apple.com/HT208359
• https://www.engadget.com/2017/12/21/apple-ignored-a-major-homekit-security-flaw-for-six-weeks/

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