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=-8.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS autolearn=ham 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 4A2D6C433ED for ; Wed, 14 Apr 2021 13:54:07 +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 AE9ED61132 for ; Wed, 14 Apr 2021 13:54:06 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org AE9ED61132 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]:56918 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lWfy0-0005lP-Ga for qemu-devel@archiver.kernel.org; Wed, 14 Apr 2021 09:54:04 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:58296) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lWfv0-0002tW-0a for qemu-devel@nongnu.org; Wed, 14 Apr 2021 09:50:58 -0400 Received: from indium.canonical.com ([91.189.90.7]:55432) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lWfuy-0008IT-7B for qemu-devel@nongnu.org; Wed, 14 Apr 2021 09:50:57 -0400 Received: from loganberry.canonical.com ([91.189.90.37]) by indium.canonical.com with esmtp (Exim 4.86_2 #2 (Debian)) id 1lWfuw-0005Gv-A3 for ; Wed, 14 Apr 2021 13:50:54 +0000 Received: from loganberry.canonical.com (localhost [127.0.0.1]) by loganberry.canonical.com (Postfix) with ESMTP id 4833C2E815F for ; Wed, 14 Apr 2021 13:50:54 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Date: Wed, 14 Apr 2021 13:36:18 -0000 From: Mauro Matteo Cascella <1909247@bugs.launchpad.net> To: qemu-devel@nongnu.org X-Launchpad-Notification-Type: bug X-Launchpad-Bug: product=qemu; status=Fix Released; importance=Undecided; assignee=None; X-Launchpad-Bug-Tags: cve fuzzer qemu security X-Launchpad-Bug-Information-Type: Public Security X-Launchpad-Bug-Private: no X-Launchpad-Bug-Security-Vulnerability: yes X-Launchpad-Bug-Commenters: a1xndr mark-cave-ayland mauro-cascella philmd pjps X-Launchpad-Bug-Reporter: Mauro Matteo Cascella (mauro-cascella) X-Launchpad-Bug-Modifier: Mauro Matteo Cascella (mauro-cascella) References: <160882932286.4370.15587232403500958955.malonedeb@wampee.canonical.com> Message-Id: <161840737838.14515.7370088548807277246.malone@chaenomeles.canonical.com> Subject: [Bug 1909247] Re: QEMU: use after free vulnerability in esp_do_dma() in hw/scsi/esp.c 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="9327c982b35e4a485a3c716663ed8345e279c16e"; Instance="production" X-Launchpad-Hash: 63bc7a3a70e95fb2853407f3e0ab00b07d35e1ea Received-SPF: none client-ip=91.189.90.7; envelope-from=bounces@canonical.com; helo=indium.canonical.com 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, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no 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 1909247 <1909247@bugs.launchpad.net> Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This is fixed now, thank you Mark. Patchset v4: https://lists.gnu.org/archive/html/qemu-devel/2021-04/msg01000.html Upstream commits: https://git.qemu.org/?p=3Dqemu.git;a=3Dcommit;h=3D0db895361b8a82e1114372ff9= f48 https://git.qemu.org/?p=3Dqemu.git;a=3Dcommit;h=3De392255766071c8cac480da3a= 9ae https://git.qemu.org/?p=3Dqemu.git;a=3Dcommit;h=3De5455b8c1c6170c788f3c0fd5= 77c https://git.qemu.org/?p=3Dqemu.git;a=3Dcommit;h=3Dc5fef9112b15c4b5494791cdf= 8bb https://git.qemu.org/?p=3Dqemu.git;a=3Dcommit;h=3D7b320a8e67a534925048cbabf= a51 https://git.qemu.org/?p=3Dqemu.git;a=3Dcommit;h=3D99545751734035b76bd372c4e= 721 https://git.qemu.org/?p=3Dqemu.git;a=3Dcommit;h=3Dfa7505c154d4d00ad89a747be= 2ed https://git.qemu.org/?p=3Dqemu.git;a=3Dcommit;h=3Dfbc6510e3379fa8f8370bf711= 98f https://git.qemu.org/?p=3Dqemu.git;a=3Dcommit;h=3D0ebb5fd80589835153a0c2baa= 1b8 https://git.qemu.org/?p=3Dqemu.git;a=3Dcommit;h=3D324c8809897c8c53ad05c3a71= 47d https://git.qemu.org/?p=3Dqemu.git;a=3Dcommit;h=3D607206948cacda4a80be5b976= dba ** Changed in: qemu Status: New =3D> Fix Released -- = You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1909247 Title: QEMU: use after free vulnerability in esp_do_dma() in hw/scsi/esp.c Status in QEMU: Fix Released Bug description: A use-after-free vulnerability was found in the am53c974 SCSI host bus adapter emulation of QEMU. It could occur in the esp_do_dma() function in hw/scsi/esp.c while handling the 'Information Transfer' command (CMD_TI). A privileged guest user may abuse this flaw to crash the QEMU process on the host, resulting in a denial of service or potential code execution with the privileges of the QEMU process. This issue was reported by Cheolwoo Myung (Seoul National University). Original report: Using hypervisor fuzzer, hyfuzz, I found a use-after-free issue in am53c974 emulator of QEMU enabled ASan. It occurs while transferring information, as it does not check the buffer to be transferred. A malicious guest user/process could use this flaw to crash the QEMU process resulting in DoS scenario. To reproduce this issue, please run the QEMU with the following command line. # To enable ASan option, please set configuration with the following $ ./configure --target-list=3Di386-softmmu --disable-werror --enable-sani= tizers $ make # To reproduce this issue, please run the QEMU process with the following= command line $ ./qemu-system-i386 -m 512 -drive file=3D./hyfuzz.img,index=3D0,media=3D= disk,format=3Draw \ -device am53c974,id=3Dscsi -device scsi-hd,drive=3DSysDisk \ -drive id=3DSysDisk,if=3Dnone,file=3D./disk.img Please find attached the disk images to reproduce this issue. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1909247/+subscriptions