From owner-freebsd-security@freebsd.org Wed Oct 26 10:03:49 2016 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 E21F8C1EA6A for ; Wed, 26 Oct 2016 10:03:49 +0000 (UTC) (envelope-from tomek.cedro@gmail.com) Received: from mail-wm0-x231.google.com (mail-wm0-x231.google.com [IPv6:2a00:1450:400c:c09::231]) (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 7BB60B1; Wed, 26 Oct 2016 10:03:49 +0000 (UTC) (envelope-from tomek.cedro@gmail.com) Received: by mail-wm0-x231.google.com with SMTP id b80so215111910wme.1; Wed, 26 Oct 2016 03:03:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to:cc:content-transfer-encoding; bh=t8Qdnmcqh6mV2gJxnQvWnXonvHrBemY1+x/Z3wRA6qk=; b=oCW0XuAZwlvFSl/rHyxJvsu20EUumul4U/M5JGKyG4InTGjDcT0pWMW4KjW5MO40Lv hS+h21lgKjXRDSFRxASmZojJUwXNiSuVJ+jqh5e9IuDP6LTCzaljuWsoW+fwwdMyXxld HMIyR8O5Xvf05bjfq8cVHfq/gl3hx9T5oXZxvZqJC/pH64WRTOR8Iy3RA0cwis39v/Ok 8v/HheG+nJtkut6iSAh8hUs3dR1JqKTXKNsbW+1eR98EdDIvFsqx89Wob4bt7iLv2F7X FJK1n0WzgusaHb0I/Od2VLR3Jsi0fB9gJSTiDVNpRTHeDUynbCDvWFdqkFGRdvQ38IsO RwjA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:sender:in-reply-to:references:from :date:message-id:subject:to:cc:content-transfer-encoding; bh=t8Qdnmcqh6mV2gJxnQvWnXonvHrBemY1+x/Z3wRA6qk=; b=AiW8hbJDXLY/orHB9sFIPO+2nRFVLJvNsRXFPMd8AQB3olCjfT/oJJcE/9hVBsQaIv yzNTpML3HrMGTXxYBlEXRFVEGZZNvwdJ/q1x9G8lgfk2+ivc9K2ZqeLfouuSIk9zgNH8 PTaefeTDAmu5iR06ZvBZQK4YuHXOxeCysxJXEPVYBnowOKjrV1twY6vOXTytpCbkXRG4 bwbyPIclw5ebRQgUowM17nVCKtWokvBzXAikFYZQBPBIZntnd+dQakL8s47dxFqE4ZMY 9v7k+6ZtjIS+sm3FLrcxlGM6iPJQeUnsUhvr7OAX7NxAchB6b0SxGfsGbJ+piiUfeKUo 1axg== X-Gm-Message-State: ABUngvc3OGx836OJBVBGNccalv5K/K+UXYDo2lStqu4D1kFuhOJPqkdigx4ifAAtqJ/3jUTbcvMnnnKfYmzz6g== X-Received: by 10.194.24.34 with SMTP id r2mr1396731wjf.111.1477476223757; Wed, 26 Oct 2016 03:03:43 -0700 (PDT) MIME-Version: 1.0 Sender: tomek.cedro@gmail.com Received: by 10.28.178.132 with HTTP; Wed, 26 Oct 2016 03:03:23 -0700 (PDT) In-Reply-To: <868ttbwio9.fsf@desk.des.no> References: <20161025173641.BCDFD1911@freefall.freebsd.org> <20161026042748.GG60006@garage.freebsd.pl> <20161026061504.GH60006@garage.freebsd.pl> <0717BEFA-4E65-4990-AC50-FD80681C110C@FreeBSD.org> <868ttbwio9.fsf@desk.des.no> From: CeDeROM Date: Wed, 26 Oct 2016 12:03:23 +0200 X-Google-Sender-Auth: RIalhLzT-OGuJQ0T2K81GR3LiZ0 Message-ID: Subject: Re: FreeBSD Security Advisory FreeBSD-SA-16:15.sysarch [REVISED] To: =?UTF-8?Q?Dag=2DErling_Sm=C3=B8rgrav?= Cc: "Robert N. M. Watson" , freebsd-security@freebsd.org, Pawel Jakub Dawidek Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-BeenThere: freebsd-security@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Security issues \[members-only posting\]" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 26 Oct 2016 10:03:50 -0000 On Wed, Oct 26, 2016 at 11:42 AM, Dag-Erling Sm=C3=B8rgrav wro= te: > CeDeROM writes: >> Robert N. M. Watson writes: >> > In general, my strong recommendation is against issuing advisories >> > for local denial-of-service attacks, (..) >> I would prefer to get that information regardless of individual >> preferences. > > It's not a matter of individual preference. During my time as so@ (and > Simon's before me), this was an explicit policy. The reason is that, as > Robert points out, there are a million ways for a trusted unprivileged > user to cause a DoS, and most of them aren't even bugs. Some of them > can be mitigated using quotas or resource limits, but far from all. Maybe a dedicated place/list for those..? That would be also good source of recommendations on how to protect a system.. something like CIS Benchmarks? :-) --=20 CeDeROM, SQ7MHZ, http://www.tomek.cedro.info