CVE-2008-4221: Apple Mac OS X

High severity, CVSS 10.0. EPSS: 3.4% chance of exploitation in the next 30 days.

The strptime API in Libsystem in Apple Mac OS X before 10.5.6 allows context-dependent attackers to cause a denial of service (memory corruption and application crash) or execute arbitrary code via a crafted date string, related to improper memory allocation.

Affected products

• Apple Mac OS X: up to and including 10.5.5; version 10.4.11 only; version 10.5 only; version 10.5.1 only; version 10.5.2 only; version 10.5.3 only; …
• Apple Mac OS X Server: up to and including 10.5.5; version 10.4.11 only; version 10.5 only; version 10.5.1 only; version 10.5.2 only; version 10.5.3 only; …

Published 2008-12-17. Last modified 2026-06-16.