CVE-2016-0747: Apple Xcode

Medium severity, CVSS 5.3. EPSS: 8.7% chance of exploitation in the next 30 days.

The resolver in nginx before 1.8.1 and 1.9.x before 1.9.10 does not properly limit CNAME resolution, which allows remote attackers to cause a denial of service (worker process resource consumption) via vectors related to arbitrary name resolution.

Affected products

• Apple Xcode: before 13.0 (fixed in 13.0)
• Canonical Ubuntu Linux: version 14.04 only; version 15.10 only
• Debian Debian Linux: version 7.0 only; version 8.0 only; version 9.0 only
• F5 Nginx: from 0.6.18, before 1.8.1 (fixed in 1.8.1); from 1.9.0, before 1.9.10 (fixed in 1.9.10)
• Opensuse Leap: version 42.1 only

Published 2016-02-15. Last modified 2026-06-17.