site_archiver@lists.apple.com Delivered-To: security-announce@lists.apple.com -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 APPLE-SA-2011-10-12-2 Apple TV Software Update 4.4 Apple TV Software Update 4.4 is now available and addresses the following: Apple TV Available for: Apple TV 4.0 through 4.3 Impact: An attacker with a privileged network position may intercept user credentials or other sensitive information Description: Fraudulent certificates were issued by multiple certificate authorities operated by DigiNotar. This issue is addressed by removing DigiNotar from the list of trusted root certificates, from the list of Extended Validation (EV) certificate authorities, and by configuring default system trust settings so that DigiNotar's certificates, including those issued by other authorities, are not trusted. Apple TV Available for: Apple TV 4.0 through 4.3 Impact: Support for X.509 certificates with MD5 hashes may expose users to spoofing and information disclosure as attacks improve Description: Certificates signed using the MD5 hash algorithm were accepted by iOS. This algorithm has known cryptographic weaknesses. Further research or a misconfigured certificate authority could have allowed the creation of X.509 certificates with attacker controlled values that would have been trusted by the system. This would have exposed X.509 based protocols to spoofing, man in the middle attacks, and information disclosure. This update disables support for an X.509 certificate with an MD5 hash for any use other than as a trusted root certificate. CVE-ID CVE-2011-3427 Apple TV Available for: Apple TV 4.0 through 4.3 Impact: An attacker could decrypt part of a SSL connection Description: Only the SSLv3 and TLS 1.0 versions of SSL were supported. These versions are subject to a protocol weakness when using block ciphers. A man-in-the-middle attacker could have injected invalid data, causing the connection to close but revealing some information about the previous data. If the same connection was attempted repeatedly the attacker may eventually have been able to decrypt the data being sent, such as a password. This issue is addressed by adding support for TLS 1.2. CVE-ID CVE-2011-3389 Apple TV Available for: Apple TV 4.0 through 4.3 Impact: Viewing a maliciously crafted TIFF image may result in an unexpected application termination or arbitrary code execution Description: A buffer overflow existed in libTIFF's handling of CCITT Group 4 encoded TIFF images. CVE-ID CVE-2011-0192 : Apple Apple TV Available for: Apple TV 4.0 through 4.3 Impact: Viewing a maliciously crafted TIFF image may lead to an unexpected application termination or arbitrary code execution Description: A heap buffer overflow existed in ImageIO's handling of CCITT Group 4 encoded TIFF images. CVE-ID CVE-2011-0241 : Cyril CATTIAUX of Tessi Technologies Apple TV Available for: Apple TV 4.0 through 4.3 Impact: A remote attacker may cause a device reset Description: The kernel failed to promptly reclaim memory from incomplete TCP connections. An attacker with the ability to connect to a listening service on an iOS device could exhaust system resources. CVE-ID CVE-2011-3259 : Wouter van der Veer of Topicus I&I, and Josh Enders Apple TV Available for: Apple TV 4.0 through 4.3 Impact: An attacker with a privileged network position may cause an unexpected application termination or arbitrary code execution Description: A one-byte heap buffer overflow existed in libxml's handling of XML data. CVE-ID CVE-2011-0216 : Billy Rios of the Google Security Team Apple TV Available for: Apple TV 4.0 through 4.3 Impact: An attacker with a privileged network position may cause an unexpected application termination or arbitrary code execution Description: A memory corruption issue existed in JavaScriptCore. CVE-ID CVE-2011-3232 : Aki Helin of OUSPG Installation note: Apple TV will periodically check for software updates. Alternatively, you may manually check for software updates by selecting "Settings -> General -> Update Software". To check the current version of software, select "Settings -> General -> About". Information will also be posted to the Apple Security Updates web site: http://support.apple.com/kb/HT1222 This message is signed with Apple's Product Security PGP key, and details are available at: https://www.apple.com/support/security/pgp/ -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.16 (Darwin) iQEcBAEBAgAGBQJOlcwaAAoJEGnF2JsdZQeegxcIAKElICLSw74Dj2vV1uDzwh8f 6cOg/AKME1KB80rFgkHymBZM4t1mrLhwYLFs5w8oFRbbL02fxAxhw/DRWYHoqWHw mPR7A2Alg7fwX4FAyhJ/EVb8/szUvRsS9YD2AxOZeDdQdw+40mP5rYgx+dkURuag Rx6S5M4LaQ7A0/yfnRhUCWc6Er78LIcFxkjY4XEHwRuOR0jOnZyHSI1wx1UAvkam HeWtRLnamHSANnZhQhrp+cesGRI5HrbbFHGJgc1nBIGZz65qgk3ZOKGh9MPBMrGm ISg0lZHs/5gVKBFmkaMj1wyMAdsaDezWov01Bqz/UrMVuqo/7sjO4Is8x99W0EE= =AlFT -----END PGP SIGNATURE----- _______________________________________________ Do not post admin requests to the list. They will be ignored. 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