CVE-2013-3951: Apple iPhone OS

Medium severity, CVSS 4.6. EPSS: 0.5% chance of exploitation in the next 30 days.

sys/openbsd/stack_protector.c in libc in Apple iOS 6.1.3 and Mac OS X 10.8.x does not properly parse the Apple strings employed in the user-space stack-cookie implementation, which allows local users to bypass cookie randomization by executing a program with a call-path beginning with the stack-guard= substring, as demonstrated by an iOS untethering attack or an attack against a setuid Mac OS X program.

Affected products

• Apple iPhone OS: up to and including 8.2; version 6.1.3 only
• Apple Mac OS X: up to and including 10.10.4; version 10.8.0 only; version 10.8.1 only; version 10.8.2 only; version 10.8.3 only; version 10.8.4 only
• Apple watchOS: up to and including 1.0.1

Published 2013-06-05. Last modified 2026-06-16.