CVE-2018-4221

HIGH

iPhone OS < 11.4 and macOS < 10.13.5 - User Tracking via S/MIME Client Certificate Transmission

Title source: llm
STIX 2.1

Description

An issue was discovered in certain Apple products. iOS before 11.4 is affected. macOS before 10.13.5 is affected. The issue involves the "Security" component. It allows web sites to track users by leveraging the transmission of S/MIME client certificates.

References (4)

Core 4
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack
http://www.securitytracker.com/id/1041027
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/104897
Vendor Advisory x_refsource_confirm
https://support.apple.com/HT208848
Vendor Advisory x_refsource_confirm
https://support.apple.com/HT208849

Scores

CVSS v3 7.5
EPSS 0.0126
EPSS Percentile 66.1%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Details

CWE
CWE-200
Status published
Products (2)
apple/iphone_os < 11.4
apple/mac_os_x < 10.13.5
Published Jun 08, 2018
Tracked Since Feb 18, 2026