About the security content of Xcode 6.3

This document describes the security content of Xcode 6.3.

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Where possible, CVE IDs are used to reference the vulnerabilities for further information.

To learn about other Security Updates, see Apple Security Updates.

Xcode 6.3

  • Clang

    Available for: OS X Yosemite v10.10 or later

    Impact: An attacker may be able to bypass stack guards

    Description: A register allocation issue existed in clang which sometimes led to stack cookie pointers being stored on the stack itself. This issue was addressed with improved register allocation.

  • Swift

    Available for: OS X Yosemite v10.10 or later

    Impact: Swift programs performing certain type conversions may receive unexpected values

    Description: A integer overflow issue existed in the simulator that could lead to conversions returning unexpected values. This issue was addressed by using improved checks.

    CVE-ID

    CVE-2015-1149

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