This document describes the security content of Apple TV 5.1.

For the protection of our customers, Apple does not disclose, discuss, or confirm security issues until a full investigation has occurred and any necessary patches or releases are available. To learn more about Apple Product Security, see the Apple Product Security website.

For information about the Apple Product Security PGP Key, see "How to use the Apple Product Security PGP Key."

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

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

Apple TV 5.1

• Apple TV

  Available for: Apple TV 2nd generation and later

  Impact: Viewing a maliciously crafted movie file may lead to an unexpected application termination or arbitrary code execution

  Description: An uninitialized memory access existed in the handling of Sorenson encoded movie files. This issue was addressed through improved memory initialization.

  CVE-ID

  CVE-2012-3722 : Will Dormann of the CERT/CC

• Apple TV

  Available for: Apple TV 2nd generation and later

  Impact: A malicious Wi-Fi network may be able to determine networks a device has previously accessed

  Description: Upon connecting to a Wi-Fi network, iOS may broadcast MAC addresses of previously accessed networks per the DNAv4 protocol. This issue was addressed by disabling DNAv4 on unencrypted Wi-Fi networks

  CVE-ID

  CVE-2012-3725 : Mark Wuergler of Immunity, Inc.

• Apple TV

  Available for: Apple TV 2nd generation and later

  Impact: Viewing a maliciously crafted TIFF file may lead to an unexpected application termination or arbitrary code execution

  Description: A buffer overflow existed in libtiff's handling of ThunderScan encoded TIFF images. This issue was addressed by updating libtiff to version 3.9.5.

  CVE-ID

  CVE-2011-1167

• Apple TV

  Available for: Apple TV 2nd generation and later

  Impact: Viewing a maliciously crafted PNG image may lead to an unexpected application termination or arbitrary code execution

  Description: Multiple memory corruption issues existed in libpng's handling of PNG images. These issues were addressed through improved validation of PNG images.

  CVE-ID

  CVE-2011-3026 : J