From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C5075C433DF for ; Sat, 23 May 2020 20:16:39 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 94E6520735 for ; Sat, 23 May 2020 20:16:39 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 94E6520735 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=bugs.launchpad.net Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:48686 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jcaZS-0003NT-Ok for qemu-devel@archiver.kernel.org; Sat, 23 May 2020 16:16:38 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:59146) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jcaYV-0002No-6f for qemu-devel@nongnu.org; Sat, 23 May 2020 16:15:39 -0400 Received: from indium.canonical.com ([91.189.90.7]:41154) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1jcaYT-0001qC-QU for qemu-devel@nongnu.org; Sat, 23 May 2020 16:15:38 -0400 Received: from loganberry.canonical.com ([91.189.90.37]) by indium.canonical.com with esmtp (Exim 4.86_2 #2 (Debian)) id 1jcaYS-0005kY-5O for ; Sat, 23 May 2020 20:15:36 +0000 Received: from loganberry.canonical.com (localhost [127.0.0.1]) by loganberry.canonical.com (Postfix) with ESMTP id 245852E8060 for ; Sat, 23 May 2020 20:15:36 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Date: Sat, 23 May 2020 20:07:06 -0000 From: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= <1859713@bugs.launchpad.net> To: qemu-devel@nongnu.org X-Launchpad-Notification-Type: bug X-Launchpad-Bug: product=qemu; status=Fix Released; importance=Undecided; assignee=rth@twiddle.net; X-Launchpad-Bug-Tags: arm X-Launchpad-Bug-Information-Type: Public X-Launchpad-Bug-Private: no X-Launchpad-Bug-Security-Vulnerability: no X-Launchpad-Bug-Commenters: grassead philmd rth vdehors X-Launchpad-Bug-Reporter: Adrien Grassein (grassead) X-Launchpad-Bug-Modifier: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9_=28philmd?= =?utf-8?q?=29?= References: <157903678645.2454.11578772527064917210.malonedeb@soybean.canonical.com> Message-Id: <159026442652.31110.10279101733280794677.malone@wampee.canonical.com> Subject: [Bug 1859713] Re: ARM v8.3a pauth not working X-Launchpad-Message-Rationale: Subscriber (QEMU) @qemu-devel-ml X-Launchpad-Message-For: qemu-devel-ml Precedence: bulk X-Generated-By: Launchpad (canonical.com); Revision="1f7bc749b40714a4cc10f5e4d787118a78037035"; Instance="production-secrets-lazr.conf" X-Launchpad-Hash: bfa520435f3c4403182ea9246d7f82362b18ddde Received-SPF: none client-ip=91.189.90.7; envelope-from=bounces@canonical.com; helo=indium.canonical.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/05/23 14:10:46 X-ACL-Warn: Detected OS = Linux 3.11 and newer [fuzzy] X-Spam_score_int: -65 X-Spam_score: -6.6 X-Spam_bar: ------ X-Spam_report: (-6.6 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.249, RCVD_IN_DNSWL_HI=-5, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Bug 1859713 <1859713@bugs.launchpad.net> Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Apparently this fixed bug is the official CVE-2020-10702: https://security-tracker.debian.org/tracker/CVE-2020-10702 ** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=3D2020-10702 -- = You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1859713 Title: ARM v8.3a pauth not working Status in QEMU: Fix Released Bug description: Host: Ubuntu 19.10 - x86_64 machine QEMU version: 3a63b24a1bbf166e6f455fe43a6bbd8dea413d92 (master) ARMV8.3 pauth is not working well. With a test code containing two pauth instructions: - paciasp that sign LR with A key and sp as context; - autiasp that verify the signature. Test: - Run the program and corrupt LR just before autiasp (ex 0x3e00000400= 660 instead of 0x3e000000400664) Expected: - autiasp places an invalid pointer in LR Result: - autiasp successfully auth the pointer and places 0x0400660 in LR. Further explanations: Adding traces in qemu code shows that "pauth_computepac" is not robus= t enough against truncating. With 0x31000000400664 as input of pauth_auth, we obtain "0x55b1d65b2c= 138e14" for PAC, "0x30" for bot_bit and "0x38" for top_bit. With 0x310040008743ec as input of pauth (with same key), we obtain "0= x55b1d65b2c138ef4" for PAC, "0x30" for bot_bit and "0x38" for top_bit. Values of top_bit and bottom_bit are strictly the same and it should = not. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1859713/+subscriptions