From owner-freebsd-security@FreeBSD.ORG Tue Sep 30 14:50:01 2003 Return-Path: Delivered-To: freebsd-security@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id E620316A4B3 for ; Tue, 30 Sep 2003 14:50:01 -0700 (PDT) Received: from gw.celabo.org (gw.celabo.org [208.42.49.153]) by mx1.FreeBSD.org (Postfix) with ESMTP id 0FC8043F85 for ; Tue, 30 Sep 2003 14:49:59 -0700 (PDT) (envelope-from nectar@celabo.org) Received: from madman.celabo.org (madman.celabo.org [10.0.1.111]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "madman.celabo.org", Issuer "celabo.org CA" (verified OK)) by gw.celabo.org (Postfix) with ESMTP id AF5B454861; Tue, 30 Sep 2003 16:49:58 -0500 (CDT) Received: by madman.celabo.org (Postfix, from userid 1001) id 4FCB86D476; Tue, 30 Sep 2003 16:49:58 -0500 (CDT) Date: Tue, 30 Sep 2003 16:49:58 -0500 From: "Jacques A. Vidrine" To: Dragos Ruiu Message-ID: <20030930214958.GA2762@madman.celabo.org> Mail-Followup-To: "Jacques A. Vidrine" , Dragos Ruiu , freebsd-security@FreeBSD.org References: <20030930203150.GC1996@madman.celabo.org> <200309301443.37090.dr@kyx.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200309301443.37090.dr@kyx.net> X-Url: http://www.celabo.org/ User-Agent: Mutt/1.5.4i-ja.1 cc: freebsd-security@FreeBSD.org Subject: Re: OpenSSL heads-up X-BeenThere: freebsd-security@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Security issues [members-only posting] List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 30 Sep 2003 21:50:02 -0000 On Tue, Sep 30, 2003 at 02:43:37PM -0700, Dragos Ruiu wrote: > On September 30, 2003 01:31 pm, Jacques A. Vidrine wrote: > > Don't panic. The vulnerability is denial-of-service. > > On September 30, 2003 07:52 am, Chris Wysopal wrote on Vulnwatch: > > Three specific vulnerabilities have been discovered in the OpenSSL > > libraries. Two of these could allow a Denial of Service attack, the third > > may result in an attacker being able to execute malicious code under > > certain conditions. > > Please clarify. Conflicting information. 1. Certain ASN.1 encodings that are rejected as invalid by the parser can trigger a bug in the deallocation of the corresponding data structure, corrupting the stack. This can be used as a denial of service attack. It is currently unknown whether this can be exploited to run malicious code. This issue does not affect OpenSSL 0.9.6. Cheers, -- Jacques Vidrine . NTT/Verio SME . FreeBSD UNIX . Heimdal nectar@celabo.org . jvidrine@verio.net . nectar@freebsd.org . nectar@kth.se