From owner-freebsd-security@freebsd.org Sat Jan 6 21:37:21 2018 Return-Path: Delivered-To: freebsd-security@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id C5CF4DF3837; Sat, 6 Jan 2018 21:37:21 +0000 (UTC) (envelope-from fjwcash@gmail.com) Received: from mail-lf0-x236.google.com (mail-lf0-x236.google.com [IPv6:2a00:1450:4010:c07::236]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 48F7A81857; Sat, 6 Jan 2018 21:37:21 +0000 (UTC) (envelope-from fjwcash@gmail.com) Received: by mail-lf0-x236.google.com with SMTP id y71so8475234lfd.12; Sat, 06 Jan 2018 13:37:21 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to; bh=VeaCCrhahGTR5WjwlkG09R8dkN7k/hKE7TBnG6w2zuY=; b=SL72Fx5QJc0H5QWPX8SqdhZIv4VYWvvsv2eoOg5HIXeee4+rf7v6CR7X4qwezQf+kF 3iBiMitaya0BvyatHH4ntyal/bGMwxb8xzy/kMSAjXLB5Gbaow2tu9wxOlGA/tXuXKgX sdEGVFwG+MxBDZfZ6Rbm29AJXFTpJ7pbk3uyu5YWIyGJwLqo2eN8e7tjNB4hnvE8cXLz iQEtS1VrHlk9uG2IdmMhGbX++gPBP8uFN4BSN4dLsyqfhAsARWjdUA1BK5Hny+YX7bhs Ug9CMyFBJFqmCjPacByKwVnaSSPoFtonGZqqG+0O91Ql72TJ93RHcoil7E48hDIrjHg7 MPDg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to; bh=VeaCCrhahGTR5WjwlkG09R8dkN7k/hKE7TBnG6w2zuY=; b=uRtu6XrljA1Q3lqzzfROasjQYY3oWrmdx1N/ETCMXp4BUGeWDqrN/I9JEWIBQ/SIX1 VQkjF1rMr48prJHyPmVzO9JYU8ut4Y5XziA31iy4/zSqvi+10pDCwRq1lK8BolhbOjtF JAt7fL4+hImy2KaanIP2b167tuPewdtMcKwMr+0dVYVAS0eUddcFsR5BImTRwBmIqTwX OQaozql11kkSEcx/CpY3zEQMqIFg9k7uAcVfIdc9rc5qhtt7oXhJDzuzM0fWfo20h6gl mwF51x9SVqKk0Xed7GpDBy2SmHDjsjCFo+TbQtp+ROd2D1sK1NtOJ2+NTgwvGCXiTl7W PRgw== X-Gm-Message-State: AKwxytdXWHFzrODCtfRxE8LEaCUTiswtcN1uaqsj0pADxWB9BiJSDtJO WlPpFOy/TuPZJhts56iPUEMvYa5OF7uDFOV6//Ny5A== X-Google-Smtp-Source: ACJfBotMFotIM1tbfdLMCAnsnlHdMM/WhEcPYKtsMIOHy83w/zxoB7a4xL3lsLZRDtHhtyohi/n0nRxgDRDTqui4OLQ= X-Received: by 10.25.86.17 with SMTP id k17mr3860615lfb.67.1515274638724; Sat, 06 Jan 2018 13:37:18 -0800 (PST) MIME-Version: 1.0 Received: by 10.25.163.207 with HTTP; Sat, 6 Jan 2018 13:37:17 -0800 (PST) Received: by 10.25.163.207 with HTTP; Sat, 6 Jan 2018 13:37:17 -0800 (PST) In-Reply-To: <20180106195510.GH75576@funkthat.com> References: <20180105191145.404BC335@spqr.komquats.com> <20180106195510.GH75576@funkthat.com> From: Freddie Cash Date: Sat, 6 Jan 2018 13:37:17 -0800 Message-ID: Subject: Re: Intel hardware bug To: Freebsd Security , FreeBSD Hackers , "freebsd-arch@freebsd.org" X-Mailman-Approved-At: Sun, 07 Jan 2018 00:12:05 +0000 Content-Type: text/plain; charset="UTF-8" X-Content-Filtered-By: Mailman/MimeDel 2.1.25 X-BeenThere: freebsd-security@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: "Security issues \[members-only posting\]" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 06 Jan 2018 21:37:21 -0000 On Jan 6, 2018 11:55 AM, "John-Mark Gurney" wrote: Freddie Cash wrote this message on Fri, Jan 05, 2018 at 11:53 -0800: > Spectre (aka CVE-2017-5715 and CVE-2017-5753) is the issue that affects all > CPUs (Intel, AMD, ARM, IBM, Oracle, etc) and allows userland processes to > read memory assigned to other userland processes (but does NOT give access > to kernel memory). No, Spectre does not allow one userland process to read another userland process's memory.. It allows an attacker to read any memory within the same process. That's variant 1 of Spectre. Variant 2 crosses process boundaries. It's the one that has VM hosting systems worried as a process running in VM1 can read memory assigned to VM2. Cheers, Freddie