From owner-freebsd-hackers@FreeBSD.ORG Sat Jul 9 00:15:59 2005 Return-Path: X-Original-To: freebsd-hackers@freebsd.org 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 8660C16A41C for ; Sat, 9 Jul 2005 00:15:59 +0000 (GMT) (envelope-from www@marlena.vvi.at) Received: from marlena.vvi.at (marlena.vvi.at [208.252.225.59]) by mx1.FreeBSD.org (Postfix) with ESMTP id E1D6743D45 for ; Sat, 9 Jul 2005 00:15:58 +0000 (GMT) (envelope-from www@marlena.vvi.at) Received: from marlena.vvi.at (localhost.marlena.vvi.at [127.0.0.1]) by marlena.vvi.at (8.12.10/8.12.9) with ESMTP id j68FYA5m062320; Fri, 8 Jul 2005 08:34:13 -0700 (PDT) (envelope-from www@marlena.vvi.at) Received: (from www@localhost) by marlena.vvi.at (8.12.10/8.12.10/Submit) id j68FY0om062318; Fri, 8 Jul 2005 08:34:00 -0700 (PDT) (envelope-from www) Date: Fri, 8 Jul 2005 08:34:00 -0700 (PDT) Message-Id: <200507081534.j68FY0om062318@marlena.vvi.at> To: root@Neo-Vortex.net From: "ALeine" Cc: freebsd-hackers@freebsd.org, jeremie@le-hen.org Subject: Re: ProPolice: best way to fill canary X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 09 Jul 2005 00:15:59 -0000 root@Neo-Vortex.net wrote: > I was meaning random length fixed value... That may be what you meant, but that's definitely not what you said. > and unless the attacker wants to set the return address to 0x0... You may want to read the paper "Four different tricks to bypass StackShield and StackGuard protection" before making more comments. http://www.coresecurity.com/files/files/11/StackguardPaper.pdf ALeine ___________________________________________________________________ WebMail FREE http://mail.austrosearch.net