Apple、OS X Yosemite向け「Safari 8.0.6」をリリース。WebKitの脆弱性を改善

Appleは、各OS Xバージョン向けSafariをアップデート、 Yosemite向け「Safari 8.0.6」、 Mavericks向け「Safari 7.1.6」、Mountain Lion向け「Safari 6.2.6」をリリースしました。

今回のYosemite向け「Safari 8.0.6」アップデートでは、「メモリ破損の脆弱性」「悪意のあるWebサイトにアクセスするとファイルシステム上のユーザー情報を損なう可能性」「悪意のあるWebサイトにアクセスするとUIのなりすましが起こる可能性」などのWebKitの脆弱性が改善されています。

「Safari 8.0.6」変更点

Safari 8.0.4アップデートはすべてのOS X Yosemiteユーザーに推奨され、セキュリティの改善を含んでいます。

Safari 8.0.6, Safari 7.1.6, and Safari 6.2.6

WebKit

Available for: OS X Mountain Lion v10.8.5, OS X Mavericks v10.9.5, and OS X Yosemite v10.10.3

Impact: Visiting a maliciously crafted website may lead to an unexpected application termination or arbitrary code execution

Description: Multiple memory corruption issues existed in WebKit. These issues were addressed through improved memory handling.

CVE-ID
CVE-2015-1152 : Apple
CVE-2015-1153 : Apple
CVE-2015-1154 : Apple

WebKit History

Available for: OS X Mountain Lion v10.8.5, OS X Mavericks v10.9.5, and OS X Yosemite v10.10.3

Impact: Visiting a maliciously crafted website may compromise user information on the filesystem

Description: A state management issue existed in Safari that allowed unprivileged origins to access contents on the filesystem. This issue was addressed through improved state management.

CVE-ID
CVE-2015-1155 : Joe Vennix of Rapid7 Inc. working with HP's Zero Day Initiative

WebKit Page Loading

Available for: OS X Mountain Lion v10.8.5, OS X Mavericks v10.9.5, and OS X Yosemite v10.10.3

Impact: Visiting a malicious website by clicking a link may lead to user interface spoofing

Description: An issue existed in the handling of the rel attribute in anchor elements. Target objects could get unauthorized access to link objects. This issue was addressed through improved link type adherence.

CVE-ID
CVE-2015-1156 : Zachary Durber of Moodle

▶︎About the security content of Safari 8.0.6, Safari 7.1.6, and Safari 6.2.6 - Apple Support
▶︎Apple セキュリティアップデート (Apple Security Update) - Apple サポート