Windows 7継続利用派の心が折れる“Windows 10パッチ優先問題”とは:Googleのセキュリティ研究員が主張
まだまだWindows 7のシェアは高いと思われるが、Googleのセキュリティ研究員によるとMicrosoftが推進している自動パッチ適用によりWindows 7の継続利用に赤信号がつくようだ。
思わぬ落とし穴が
Googleのゼロデイ攻撃撲滅に取り組む専門チームProject Zeroのセキュリティ研究員であるマテウシュ・ユルチク氏は、Microsoftの最新バージョンに対するパッチ適用を優先する方針に対し、新たな問題を引き起こしかねないと注意を促している。最新バージョンつまりWindows 10用のソフトウェア修正パッチを優先するあまり、古いバージョンのパッチ提供が遅くなるかもしれない。その場合、悪意のあるユーザーが古いバージョンのWindowsに脆弱(ぜいじゃく)性を発見してしまう危険性があるというのだ。
ユルチク氏はProject Zeroの2017年10月5日ブログで、syscallのmemset関数の呼び出し不具合についてWindows 10にのみパッチが適応され、Windows 7とWindows 8.1ではパッチ適用されていない問題について述べた。
「この記事の執筆時で、Windows 7は依然としてデスクトップ市場で約50%のシェアを持っているにもかかわらず、Microsoftが多くの構造的なセキュリティの改善や通常のバグ修正さえも最も新しいWindowsバージョンのみにしか提供していないのは周知の事実だ。古いシステムのユーザーはセキュリティが守られていると誤解し、ソフトウェアの欠陥、脆弱性を抱えてしまう。しかもその脆弱性は異なるバージョンのWindowsを比較するだけで検出することができる」とユルチク氏は語る。
悪意のある攻撃者は、パッチをリバースエンジニアリング(プログラムを逆解析する手法)することでまずパッチが修正する不具合を特定する。さらにシステム間のコード比較(パッチ比較)または異なるバージョンの製品間のコード比較(バイナリ比較)を行うことで、脆弱性を特定する。
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企業の生産性を向上させるためには、従業員が快適に働ける環境作りが重要になる。そこで参考にしてほしいのが、サイボウズが導入している「PCの従業員選択制」だ。業務用の端末を従業員が自由に選べることによる効果を紹介する。
技術文書・技術解説 SB C&S株式会社
Windows Server 2025は、セキュリティや可用性の向上に加え、Active Directory不要のワークグループ環境でもフェールオーバーとHyper-Vによるライブマイグレーションを実現した。Windows Server 2025が備える特長を詳しく解説する。
製品資料 株式会社AIT
企業ITの複雑化が加速する中、安定運用とセキュリティリスク低減を図るため、マネージドサービスの採用が拡大している。本資料では、コンサルティング支援からシステム設計・構築、運用までを包括的にサポートするサービスを紹介する。
事例 横河レンタ・リース株式会社
地図情報を提供するゼンリンでは、約4000台のPCを運用しており、15年ほど前から、PCレンタルサービスを活用。それによりトータルコスト・情シス部門の運用負荷の軽減で大きな成果を挙げている。