英特爾處理器被發現新漏洞,影響第 2、4 - 3C
By Joseph
at 2018-03-30T10:05
at 2018-03-30T10:05
Table of Contents
科技新報TechNews
在處理器大廠英特爾 (Intel) 之前的處理器 Meltdown 和 Spectre 漏洞問題尚未完全平息之際,根據國外專門報導資訊安全的專業媒體《scmagazine》的報導指出,有研究人員又在英特爾的處理器上發現了新的漏洞。而且,這新的漏洞將無法採用之前的 Meltdown 和 Spectre 的修補程式來完全修復這個漏洞。
報導指出,4 位來自美國的幾所著名大學的研究人員表示,他們發現了一種新的攻擊方式,並把這一漏洞稱為「BranchScope」。「BranchScope」與之前的 Meltdown 和 Spectre 不完全相同,而彼此的相似之處就是都是由透過處理器中的分支預測(Branch Prediction)來發起攻擊,這使得藉由「BranchScope」的漏洞也可以直接取得用戶的敏感資訊。
研究人員在 i7-2600、i7-4800MQ 和 i5-6200U 3 顆不同年代的 Intel 處理器上成功驗證了「BranchScope」漏洞。這樣就表示,Intel 酷睿系列的第 2 代 Sandy Bridge 處理器、第 4 代 Haswell 處理器,以及第 6 代 Skylake 處理器都未能對該漏洞免疫。另外,目前研究人員也還在針對 AMD 處理器進行測試當中。
有其他外媒報導表示,研究人員指出,現存的安全修復程式和微碼更新智慧型防護對來自「BranchScope」的攻擊,還需要進一步的措施才能完全免疫。但是,「BranchScope」通道攻擊這一手段並未隨 Meltdown 和 Spectre 漏洞問題而被廣泛使用。因此,攻擊者仍需要很長時間才能真正利用這些漏洞,攻陷硬體、獲取使用者的敏感資訊。在那之前,仍有足夠的時間研究對應的防護措施。
Intel 方面,則對漏洞的危害狀況保持著樂觀的態度。Intel 發出聲明指出,他們一直在與這些研究人員合作,並已確定他們描述的問題與先前的通道攻擊相似。因此,我們認為現有的軟體修復方案對於通道攻擊同樣有效。我們也認為與研究團體保持密切合作,是保護用戶和他們的數據最佳手段之一,也同樣對這些研究人員的工作十分讚賞。
https://goo.gl/FfNRaU
又有新漏洞了
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