From owner-freebsd-hackers@FreeBSD.ORG Fri Apr 23 16:55:46 2004 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 5BC8C16A4CF for ; Fri, 23 Apr 2004 16:55:46 -0700 (PDT) Received: from mxsf16.cluster1.charter.net (mxsf16.cluster1.charter.net [209.225.28.216]) by mx1.FreeBSD.org (Postfix) with ESMTP id C9A4C43D39 for ; Fri, 23 Apr 2004 16:55:45 -0700 (PDT) (envelope-from ups@tree.com) Received: from stups.com ([209.187.143.11])i3NNjb4s050466; Fri, 23 Apr 2004 19:45:38 -0400 (EDT) Received: from tree.com (localhost [127.0.0.1]) by stups.com (8.9.3/8.9.3) with ESMTP id TAA10405; Fri, 23 Apr 2004 19:45:37 -0400 Message-Id: <200404232345.TAA10405@stups.com> X-Mailer: exmh version 2.0.2 To: Julian Elischer In-Reply-To: Message from Julian Elischer Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Fri, 23 Apr 2004 19:45:37 -0400 From: Stephan Uphoff cc: hackers@freebsd.org cc: Stephan Uphoff Subject: Re: Re99: how to flush out cache.? X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 23 Apr 2004 23:55:46 -0000 Julian Elischer wrote: > with this bug could a user zero out /etc/group or similar? > I am not sure what the ramification of the bug is.. The bug affects only in memory modified file data. In memory modifications to the file can be deleted and the file data reverts to a state before the file modification. (Not unlike a crash/power failure ) The worst security scenario I can think of is the possibility to revert a file to uninitialized disk data blocks or to prevent the update of a file. Stephan