CVE-2011-0228: Apple iPhone OS

High severity, CVSS 7.5. EPSS: 6.5% chance of exploitation in the next 30 days.

The Data Security component in Apple iOS before 4.2.10 and 4.3.x before 4.3.5 does not check the basicConstraints parameter during validation of X.509 certificate chains, which allows man-in-the-middle attackers to spoof an SSL server by using a non-CA certificate to sign a certificate for an arbitrary domain.

Affected products

• Apple iPhone OS: up to and including 4.2.9; version 1.0.0 only; version 1.0.1 only; version 1.0.2 only; version 1.1.0 only; version 1.1.1 only; …

Published 2011-08-29. Last modified 2026-06-16.