From xen-announce-bounces@lists.xen.org Fri Aug 01 15:07:04 2014 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Fri, 01 Aug 2014 15:07:04 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1XDEOq-0001G2-ON; Fri, 01 Aug 2014 15:05:40 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1XDEOO-0001FW-VP for xen-announce@lists.xen.org; Fri, 01 Aug 2014 15:05:13 +0000 Received: from [85.158.139.211:27205] by server-6.bemta-5.messagelabs.com id 6E/19-06284-8ACABD35; Fri, 01 Aug 2014 15:05:12 +0000 X-Env-Sender: lars.kurth.xen@gmail.com X-Msg-Ref: server-16.tower-206.messagelabs.com!1406905510!8482752!1 X-Originating-IP: [74.125.82.43] X-SpamReason: No, hits=1.9 required=7.0 tests=BODY_RANDOM_LONG, HTML_MESSAGE,HTML_OBFUSCATE_05_10 X-StarScan-Received: X-StarScan-Version: 6.11.3; banners=-,-,- X-VirusChecked: Checked Received: (qmail 17050 invoked from network); 1 Aug 2014 15:05:10 -0000 Received: from mail-wg0-f43.google.com (HELO mail-wg0-f43.google.com) (74.125.82.43) by server-16.tower-206.messagelabs.com with RC4-SHA encrypted SMTP; 1 Aug 2014 15:05:10 -0000 Received: by mail-wg0-f43.google.com with SMTP id l18so4290340wgh.26 for ; Fri, 01 Aug 2014 08:05:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=sender:message-id:date:from:reply-to:user-agent:mime-version:to :subject:content-type; bh=7N0Tqpx6DpvFQcQTIIvWCGwoQCZwP4auGCGRp8UZEn4=; b=fbmhRrReEHzzw4vbdeMZm8te3zSvVNAbZRE0CbI8cOZ4sE0ND+Z0ocatI4A7NCj1H3 V/E8pkTMshcgXbNF+bwtTIwTxL58+ufM1iwrJV6vBlMe+uOuj7ryRh0rdvNTvUTPHl1p XOy/AwdtwMl94/IW0Li1NELnv9nj5gCAZuEfgKj+Y7uJqwR2cUQIj5t9fWTOt0zF0wK/ 5LvxsGd08nd97mISkZjfe9usl9QrEZ93UY2nIWTWi6GnFOKxGsxg1nQ8P+mUWv1GN4A5 3q7DBAhSdpWcUH6C+WTHwTSQ+Aucyeryr8Tixmy7WlJ5lvZ8VBPXZrYrVMqyfdrRwpOQ FC2w== X-Received: by 10.194.191.162 with SMTP id gz2mr8908211wjc.89.1406905508584; Fri, 01 Aug 2014 08:05:08 -0700 (PDT) Received: from [172.16.26.11] (host86-174-110-189.range86-174.btcentralplus.com. [86.174.110.189]) by mx.google.com with ESMTPSA id t6sm9538380wib.4.2014.08.01.08.05.07 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Fri, 01 Aug 2014 08:05:07 -0700 (PDT) Message-ID: <53DBACA2.3030509@xen.org> Date: Fri, 01 Aug 2014 16:05:06 +0100 From: Lars Kurth User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:24.0) Gecko/20100101 Thunderbird/24.6.0 MIME-Version: 1.0 To: xen-announce@lists.xen.org X-Mailman-Approved-At: Fri, 01 Aug 2014 15:05:39 +0000 Subject: [Xen-announce] =?windows-1252?q?2_weeks_to_Xen_Project_Developer_?= =?windows-1252?q?Summit_=96_Chicago_18-19=2C_IL=2C_USA?= X-BeenThere: xen-announce@lists.xen.org X-Mailman-Version: 2.1.13 Precedence: list Reply-To: lars.kurth@xen.org List-Id: "Xen announcements \(low volume\)" List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============3816828107713124381==" Sender: xen-announce-bounces@lists.xen.org Errors-To: xen-announce-bounces@lists.xen.org This is a multi-part message in MIME format. --===============3816828107713124381== Content-Type: multipart/alternative; boundary="------------080807030104060002040205" This is a multi-part message in MIME format. --------------080807030104060002040205 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Length: 3234 Content-Transfer-Encoding: quoted-printable Only last week, the Xen Project team was at OSCON where we launched Mirage OS 2.0 (event report to follow soon, but in the meantime check out the following sessions Nymote and Mirage , Floss Weekly on Mirage OS and Community War Stories ) and now our Developer Summit is just round the corner. As we have seen tremendous community growth in the last 12 months (>30%) and the most feature reach Xen Project Hypervisor release coming up soon, I thought I=92d share what you can expect. What to expect=3F Xen Project Developer Summits are packed with highly technical content where the core developers of the Xen Project community come together to discuss the evolution of the Xen Project. The conference is a mixture of talks and interactive sessions in un-conference format (which we call BoFs). Newcomers and those who are interested in the progress and future of the Xen Project, it=92s sub projects (Hypervisor on ARM and x86, Upstreams and Downstreams, Embedded and Automotive variants, Cloud Operating Systems such as Mirage OS) usually will get tremendous value from attending the event. Besides roadmap, feature updates and developer topics, this year features a few themes: * Network Function Virtualization * Security * Performance and Scalability * Cloud Operating Systems * Topics that are important for automotive/embedded/mobile use-cases, such as Real-time virtualization, certification and ARM support Why not check out the agenda or watch last year=92s sessions to get a sense of what is coming. Note that BoF=92s and discussion groups will be published next week. How to get the most out of the Summit=3F Our developer events are designed to help you make connections and to participate. A good way to network are our evening social event and to network during the breaks. Another great way to get the most out of the summit is to submit a BoF/discussion groups about a topic you care about or to participate in a BoF/discussion group. BoF submissions are open until August 11 and the BoF schedule will be published the week before the event. Most of our talks will have an extensive and interactive Q&A portion, which is another way to engage. Links: http://events.linuxfoundation.org/events/xen-project-developer-summit/program/schedule http://events.linuxfoundation.org/events/xen-project-developer-summit/attend/register http://events.linuxfoundation.org/events/xen-project-developer-summit --------------080807030104060002040205 Content-Type: text/html; charset=windows-1252 Content-Length: 10410 Content-Transfer-Encoding: quoted-printable

Only last week, the Xen Project team was at OSCON where we launched=A0Mirage OS 2.0(event report to follow soon, but in the meantime check out the following sessions=A0Nymote and Mirage,=A0Floss Weekly on Mirage OS=A0and=A0Community War Stories) and now our Developer Summit is just round the corner. As we have seen tremendous community growth in the last 12 months (>30%) and the most feature reach Xen Project Hypervisor release coming up soon, I thought I=92d share what you can expect.

What to expect=3F

Xen Project Developer Summits are packed with highly technical content where the core developers of the Xen Project community come together to discuss the evolution of the Xen Project. The conference is a mixture of talks and interactive sessions in un-conference format (which we call BoFs). Newcomers and those who are interested in the progress and future of the Xen Project, it=92s sub projects (Hypervisor on ARM and x86, Upstreams and Downstreams, Embedded and Automotive variants, Cloud Operating Systems such as Mirage OS) usually will get tremendous value from attending the event.

Besides roadmap, feature updates and developer topics, this year features a few themes:

  • Network Function Virtualization
  • Security
  • Performance and Scalability
  • Cloud Operating Systems
  • Topics that are important for automotive/embedded/mobile use-cases, such as Real-time virtualization, certification and ARM support

Why not check out the=A0agenda=A0or watch=A0last year=92s sessions=A0to get a sense of what is coming. Note that BoF=92s and discussion groups will be published next week.

How to get the most out of the Summit=3F

Our developer events are designed to help you make connections and to participate. A good way to network are our evening social event and to network during the breaks. Another great way to get the most out of the summit is to submit a BoF/discussion groups about a topic you care about or to participate in a BoF/discussion group. BoF=A0submissions=A0are open until August 11 and the BoF schedule will be published the week before the event. Most of our talks will have an extensive and interactive Q&A portion, which is another way to engage.

Links:

http://events.linuxfoundation.org/events/xen-project-developer-summit/program/schedule
http://events.linuxfoundation.org/events/xen-project-developer-summit/attend/register
http://events.linuxfoundation.org/events/xen-project-developer-summit

--------------080807030104060002040205-- --===============3816828107713124381== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Xen-announce mailing list Xen-announce@lists.xen.org http://lists.xen.org/xen-announce --===============3816828107713124381==-- From xen-announce-bounces@lists.xen.org Fri Aug 01 15:07:04 2014 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Fri, 01 Aug 2014 15:07:04 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1XDEOq-0001G2-ON; Fri, 01 Aug 2014 15:05:40 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1XDEOO-0001FW-VP for xen-announce@lists.xen.org; Fri, 01 Aug 2014 15:05:13 +0000 Received: from [85.158.139.211:27205] by server-6.bemta-5.messagelabs.com id 6E/19-06284-8ACABD35; Fri, 01 Aug 2014 15:05:12 +0000 X-Env-Sender: lars.kurth.xen@gmail.com X-Msg-Ref: server-16.tower-206.messagelabs.com!1406905510!8482752!1 X-Originating-IP: [74.125.82.43] X-SpamReason: No, hits=1.9 required=7.0 tests=BODY_RANDOM_LONG, HTML_MESSAGE,HTML_OBFUSCATE_05_10 X-StarScan-Received: X-StarScan-Version: 6.11.3; banners=-,-,- X-VirusChecked: Checked Received: (qmail 17050 invoked from network); 1 Aug 2014 15:05:10 -0000 Received: from mail-wg0-f43.google.com (HELO mail-wg0-f43.google.com) (74.125.82.43) by server-16.tower-206.messagelabs.com with RC4-SHA encrypted SMTP; 1 Aug 2014 15:05:10 -0000 Received: by mail-wg0-f43.google.com with SMTP id l18so4290340wgh.26 for ; Fri, 01 Aug 2014 08:05:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=sender:message-id:date:from:reply-to:user-agent:mime-version:to :subject:content-type; bh=7N0Tqpx6DpvFQcQTIIvWCGwoQCZwP4auGCGRp8UZEn4=; b=fbmhRrReEHzzw4vbdeMZm8te3zSvVNAbZRE0CbI8cOZ4sE0ND+Z0ocatI4A7NCj1H3 V/E8pkTMshcgXbNF+bwtTIwTxL58+ufM1iwrJV6vBlMe+uOuj7ryRh0rdvNTvUTPHl1p XOy/AwdtwMl94/IW0Li1NELnv9nj5gCAZuEfgKj+Y7uJqwR2cUQIj5t9fWTOt0zF0wK/ 5LvxsGd08nd97mISkZjfe9usl9QrEZ93UY2nIWTWi6GnFOKxGsxg1nQ8P+mUWv1GN4A5 3q7DBAhSdpWcUH6C+WTHwTSQ+Aucyeryr8Tixmy7WlJ5lvZ8VBPXZrYrVMqyfdrRwpOQ FC2w== X-Received: by 10.194.191.162 with SMTP id gz2mr8908211wjc.89.1406905508584; Fri, 01 Aug 2014 08:05:08 -0700 (PDT) Received: from [172.16.26.11] (host86-174-110-189.range86-174.btcentralplus.com. [86.174.110.189]) by mx.google.com with ESMTPSA id t6sm9538380wib.4.2014.08.01.08.05.07 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Fri, 01 Aug 2014 08:05:07 -0700 (PDT) Message-ID: <53DBACA2.3030509@xen.org> Date: Fri, 01 Aug 2014 16:05:06 +0100 From: Lars Kurth User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:24.0) Gecko/20100101 Thunderbird/24.6.0 MIME-Version: 1.0 To: xen-announce@lists.xen.org X-Mailman-Approved-At: Fri, 01 Aug 2014 15:05:39 +0000 Subject: [Xen-announce] =?windows-1252?q?2_weeks_to_Xen_Project_Developer_?= =?windows-1252?q?Summit_=96_Chicago_18-19=2C_IL=2C_USA?= X-BeenThere: xen-announce@lists.xen.org X-Mailman-Version: 2.1.13 Precedence: list Reply-To: lars.kurth@xen.org List-Id: "Xen announcements \(low volume\)" List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============3816828107713124381==" Sender: xen-announce-bounces@lists.xen.org Errors-To: xen-announce-bounces@lists.xen.org This is a multi-part message in MIME format. --===============3816828107713124381== Content-Type: multipart/alternative; boundary="------------080807030104060002040205" This is a multi-part message in MIME format. --------------080807030104060002040205 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Length: 3234 Content-Transfer-Encoding: quoted-printable Only last week, the Xen Project team was at OSCON where we launched Mirage OS 2.0 (event report to follow soon, but in the meantime check out the following sessions Nymote and Mirage , Floss Weekly on Mirage OS and Community War Stories ) and now our Developer Summit is just round the corner. As we have seen tremendous community growth in the last 12 months (>30%) and the most feature reach Xen Project Hypervisor release coming up soon, I thought I=92d share what you can expect. What to expect=3F Xen Project Developer Summits are packed with highly technical content where the core developers of the Xen Project community come together to discuss the evolution of the Xen Project. The conference is a mixture of talks and interactive sessions in un-conference format (which we call BoFs). Newcomers and those who are interested in the progress and future of the Xen Project, it=92s sub projects (Hypervisor on ARM and x86, Upstreams and Downstreams, Embedded and Automotive variants, Cloud Operating Systems such as Mirage OS) usually will get tremendous value from attending the event. Besides roadmap, feature updates and developer topics, this year features a few themes: * Network Function Virtualization * Security * Performance and Scalability * Cloud Operating Systems * Topics that are important for automotive/embedded/mobile use-cases, such as Real-time virtualization, certification and ARM support Why not check out the agenda or watch last year=92s sessions to get a sense of what is coming. Note that BoF=92s and discussion groups will be published next week. How to get the most out of the Summit=3F Our developer events are designed to help you make connections and to participate. A good way to network are our evening social event and to network during the breaks. Another great way to get the most out of the summit is to submit a BoF/discussion groups about a topic you care about or to participate in a BoF/discussion group. BoF submissions are open until August 11 and the BoF schedule will be published the week before the event. Most of our talks will have an extensive and interactive Q&A portion, which is another way to engage. Links: http://events.linuxfoundation.org/events/xen-project-developer-summit/program/schedule http://events.linuxfoundation.org/events/xen-project-developer-summit/attend/register http://events.linuxfoundation.org/events/xen-project-developer-summit --------------080807030104060002040205 Content-Type: text/html; charset=windows-1252 Content-Length: 10410 Content-Transfer-Encoding: quoted-printable

Only last week, the Xen Project team was at OSCON where we launched=A0Mirage OS 2.0(event report to follow soon, but in the meantime check out the following sessions=A0Nymote and Mirage,=A0Floss Weekly on Mirage OS=A0and=A0Community War Stories) and now our Developer Summit is just round the corner. As we have seen tremendous community growth in the last 12 months (>30%) and the most feature reach Xen Project Hypervisor release coming up soon, I thought I=92d share what you can expect.

What to expect=3F

Xen Project Developer Summits are packed with highly technical content where the core developers of the Xen Project community come together to discuss the evolution of the Xen Project. The conference is a mixture of talks and interactive sessions in un-conference format (which we call BoFs). Newcomers and those who are interested in the progress and future of the Xen Project, it=92s sub projects (Hypervisor on ARM and x86, Upstreams and Downstreams, Embedded and Automotive variants, Cloud Operating Systems such as Mirage OS) usually will get tremendous value from attending the event.

Besides roadmap, feature updates and developer topics, this year features a few themes:

  • Network Function Virtualization
  • Security
  • Performance and Scalability
  • Cloud Operating Systems
  • Topics that are important for automotive/embedded/mobile use-cases, such as Real-time virtualization, certification and ARM support

Why not check out the=A0agenda=A0or watch=A0last year=92s sessions=A0to get a sense of what is coming. Note that BoF=92s and discussion groups will be published next week.

How to get the most out of the Summit=3F

Our developer events are designed to help you make connections and to participate. A good way to network are our evening social event and to network during the breaks. Another great way to get the most out of the summit is to submit a BoF/discussion groups about a topic you care about or to participate in a BoF/discussion group. BoF=A0submissions=A0are open until August 11 and the BoF schedule will be published the week before the event. Most of our talks will have an extensive and interactive Q&A portion, which is another way to engage.

Links:

http://events.linuxfoundation.org/events/xen-project-developer-summit/program/schedule
http://events.linuxfoundation.org/events/xen-project-developer-summit/attend/register
http://events.linuxfoundation.org/events/xen-project-developer-summit

--------------080807030104060002040205-- --===============3816828107713124381== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Xen-announce mailing list Xen-announce@lists.xen.org http://lists.xen.org/xen-announce --===============3816828107713124381==-- From xen-announce-bounces@lists.xen.org Tue Aug 12 13:04:46 2014 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Tue, 12 Aug 2014 13:04:46 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1XHBjx-0002mJ-0a; Tue, 12 Aug 2014 13:03:49 +0000 Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1XHBjo-0002hn-V4; Tue, 12 Aug 2014 13:03:41 +0000 Received: from [85.158.143.35:59587] by server-1.bemta-4.messagelabs.com id 90/08-05872-AA01AE35; Tue, 12 Aug 2014 13:03:38 +0000 X-Env-Sender: iwj@xenbits.xen.org X-Msg-Ref: server-4.tower-21.messagelabs.com!1407848617!12523410!1 X-Originating-IP: [50.57.168.107] X-SpamReason: No, hits=0.5 required=7.0 tests=BODY_RANDOM_LONG X-StarScan-Received: X-StarScan-Version: 6.12.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 20524 invoked from network); 12 Aug 2014 13:03:38 -0000 Received: from mail.xen.org (HELO mail.xen.org) (50.57.168.107) by server-4.tower-21.messagelabs.com with AES256-SHA encrypted SMTP; 12 Aug 2014 13:03:38 -0000 Received: from xenbits.xen.org ([50.57.170.242]) by mail.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1XHBjh-0004GT-CR; Tue, 12 Aug 2014 13:03:33 +0000 Received: from iwj by xenbits.xen.org with local (Exim 4.72) (envelope-from ) id 1XHBjh-00087j-Aj; Tue, 12 Aug 2014 13:03:33 +0000 Date: Tue, 12 Aug 2014 13:03:33 +0000 Message-Id: Content-Type: multipart/mixed; boundary="=separator"; charset="utf-8" Content-Transfer-Encoding: binary MIME-Version: 1.0 X-Mailer: MIME-tools 5.428 (Entity 5.428) To: xen-announce@lists.xen.org, xen-devel@lists.xen.org, xen-users@lists.xen.org, oss-security@lists.openwall.com From: Xen.org security team Cc: "Xen.org security team" Subject: [Xen-announce] Xen Security Advisory 103 (CVE-2014-5148) - Flaw in handling unknown system register access from 64-bit userspace on ARM X-BeenThere: xen-announce@lists.xen.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: "Xen announcements \(low volume\)" List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-announce-bounces@lists.xen.org Errors-To: xen-announce-bounces@lists.xen.org --=separator Content-Type: text/plain; charset="utf-8" Content-Disposition: inline Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Xen Security Advisory CVE-2014-5148 / XSA-103 version 3 Flaw in handling unknown system register access from 64-bit userspace on ARM UPDATES IN VERSION 3 ==================== Public release. ISSUE DESCRIPTION ================= When handling an unknown system register access from 64-bit userspace Xen would incorrectly return to the second instruction of the trap handler for faults in kernel space rather than the first instruction of the trap handler for faults in 64-bit userspace. Any user in a guest which is running a 64-bit kernel who is able to spawn a 64-bit process can cause a trap to the kernel to be taken at an unexpected (but not user controlled) exception address. Known versions of Linux in the default configuration will Oops and kill the offending process, and therefore avoid this vulnerability. However local configuration may turn such an Oops into a kernel panic, and therefore a guest denial of service. IMPACT ====== Depending on the guest kernel implementation, kernel crash (guest DoS) or privilege elevation to that of the guest kernel cannot be ruled out. This issue does not enable an attack on the host. VULNERABLE SYSTEMS ================== 64-bit ARM systems may be vulnerable, depending on the guest kernel. All versions of Linux released by Linux upstream to date avoid this vulnerability. Systems based on modified versions of Linux may be vulnerable. 32-bit ARM systems, and X86 systems, are not vulnerable. MITIGATION ========== There is no known mitigation for this issue. CREDITS ======= This issue was reported as a bug by Riku Voipio, discovered via Linaro's LAVA testing and was diagnosed as a security issue by Ian Campbell. RESOLUTION ========== Applying the appropriate attached patch resolves this issue. The patch for XSA-103 (specifically, xsa102-*-02.patch) must be applied first. xsa103-unstable.patch xen-unstable xsa103-4.4.patch Xen 4.4.x $ sha256sum xsa103*.patch fee2e0be91d08aa28ba44b616edd99a1bfcdec419966c3f9e843a842d649e4ea xsa103-4.4.patch 838d059618d31b272ec10ac8cbb6613a68b634c98418aff2a33cd514ed06b55a xsa103-unstable.patch $ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJT6hBtAAoJEIP+FMlX6CvZ6+sIAMiAJEzJl2pWk61kr3QT1llk lYYEEX94QxxJIzg62o4RnMzYZXsmOT6y2YP62nEziRbBaFcgmB0bNrx+Qc52+QWk iea2lYAJUGmEdwnY6x2raLF6Wd2alCjZxXF1UzSJJ6Vu8WiTNFXHI+mKlc9JY4bN aStmfgvN3j6Nmjav8k9ar/8QVfc4Oe0xOlzwFt5DlNHewExWN1y+HtPnrBTkGu5K ckgjvbxs4/SF4No59XqY0XxdpEDIEXo46keJ07DG6/nVzIl83ZtpBhxiNX8xfz91 ZYzu6feGbgtvy1+utxo/l3qBAn7TrDXn58mLTgKTM2dD3D4Crv9tKLuOXF1xVLM= =hjBc -----END PGP SIGNATURE----- --=separator Content-Type: application/octet-stream; name="xsa103-4.4.patch" Content-Disposition: attachment; filename="xsa103-4.4.patch" Content-Transfer-Encoding: base64 RnJvbSBiMzA3NWJlYjE4OGY2ZmQxY2I1MzIyNTA1Zjc2MzdkM2RlNmNmZDQx IE1vbiBTZXAgMTcgMDA6MDA6MDAgMjAwMQpGcm9tOiBJYW4gSmFja3NvbiA8 aWFuLmphY2tzb25AZXUuY2l0cml4LmNvbT4KRGF0ZTogVGh1LCAyNCBKdWwg MjAxNCAxNzoyMToxNSArMDEwMApTdWJqZWN0OiBbUEFUQ0hdIHhlbjogYXJt OiBDb3JyZWN0bHkgaGFuZGxlIGRvX3N5c3JlZyBleGNlcHRpb24gaW5qZWN0 aW9uCiBmcm9tIDY0LWJpdCB1c2Vyc3BhY2UKClRoZSBkb19zeXNyZWcgY2Fz ZSB3YXMgbWlzc2luZyBhIHJldHVybiwgc28gaXQgd291bGQgaW5jcmVtZW50 IFBDIGFuZAppbmplY3QgdGhlIHRyYXAgdG8gdGhlIHNlY29uZCBpbnN0cnVj dGlvbiBvZiB0aGUgaGFuZGxlci4KCihUaGlzIHBhdGNoIG5lZWRzIHRvIGJl IGFwcGxpZWQgb24gdG9wIG9mIHhzYTEwMi00LjQtMDIucGF0Y2guKQoKVGhp cyBpcyBYU0EtMTAzLgoKU2lnbmVkLW9mZi1ieTogSWFuIENhbXBiZWxsIDxp YW4uY2FtcGJlbGxAY2l0cml4LmNvbT4KU2lnbmVkLW9mZi1ieTogSWFuIEph Y2tzb24gPGlhbi5qYWNrc29uQGV1LmNpdHJpeC5jb20+CkFja2VkLWJ5OiBK dWxpZW4gR3JhbGwgPGp1bGllbi5ncmFsbEBsaW5hcm8ub3JnPgotLS0KIHhl bi9hcmNoL2FybS90cmFwcy5jIHwgICAgMSArCiAxIGZpbGUgY2hhbmdlZCwg MSBpbnNlcnRpb24oKykKCmRpZmYgLS1naXQgYS94ZW4vYXJjaC9hcm0vdHJh cHMuYyBiL3hlbi9hcmNoL2FybS90cmFwcy5jCmluZGV4IGU3NjNmMTIuLjRj OTEwYzggMTAwNjQ0Ci0tLSBhL3hlbi9hcmNoL2FybS90cmFwcy5jCisrKyBi L3hlbi9hcmNoL2FybS90cmFwcy5jCkBAIC0xNjgzLDYgKzE2ODMsNyBAQCBz dGF0aWMgdm9pZCBkb19zeXNyZWcoc3RydWN0IGNwdV91c2VyX3JlZ3MgKnJl Z3MsCiAgICAgICAgICAgICAgICAgICAgICBoc3IuYml0cyAmIEhTUl9TWVNS RUdfUkVHU19NQVNLKTsKICNlbmRpZgogICAgICAgICAgICAgaW5qZWN0X3Vu ZGVmX2V4Y2VwdGlvbihyZWdzLCBzeXNyZWcubGVuKTsKKyAgICAgICAgICAg IHJldHVybjsKICAgICAgICAgfQogICAgIH0KIAotLSAKMS43LjEwLjQKCg== --=separator Content-Type: application/octet-stream; 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charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Xen-announce mailing list Xen-announce@lists.xen.org http://lists.xen.org/xen-announce --=separator-- From xen-announce-bounces@lists.xen.org Tue Aug 12 13:04:46 2014 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Tue, 12 Aug 2014 13:04:46 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1XHBjs-0002jD-1p; Tue, 12 Aug 2014 13:03:44 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1XHBjm-0002hK-Ij; Tue, 12 Aug 2014 13:03:38 +0000 Received: from [85.158.139.211:24658] by server-6.bemta-5.messagelabs.com id ED/D3-06284-9A01AE35; Tue, 12 Aug 2014 13:03:37 +0000 X-Env-Sender: iwj@xenbits.xen.org X-Msg-Ref: server-6.tower-206.messagelabs.com!1407848615!10884061!1 X-Originating-IP: [50.57.168.107] X-SpamReason: No, hits=0.5 required=7.0 tests=BODY_RANDOM_LONG X-StarScan-Received: X-StarScan-Version: 6.12.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 5226 invoked from network); 12 Aug 2014 13:03:36 -0000 Received: from mail.xen.org (HELO mail.xen.org) (50.57.168.107) by server-6.tower-206.messagelabs.com with AES256-SHA encrypted SMTP; 12 Aug 2014 13:03:36 -0000 Received: from xenbits.xen.org ([50.57.170.242]) by mail.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1XHBje-0004GD-I1; Tue, 12 Aug 2014 13:03:30 +0000 Received: from iwj by xenbits.xen.org with local (Exim 4.72) (envelope-from ) id 1XHBje-00086k-FW; Tue, 12 Aug 2014 13:03:30 +0000 Date: Tue, 12 Aug 2014 13:03:30 +0000 Message-Id: Content-Type: multipart/mixed; boundary="=separator"; charset="utf-8" Content-Transfer-Encoding: binary MIME-Version: 1.0 X-Mailer: MIME-tools 5.428 (Entity 5.428) To: xen-announce@lists.xen.org, xen-devel@lists.xen.org, xen-users@lists.xen.org, oss-security@lists.openwall.com From: Xen.org security team Cc: "Xen.org security team" Subject: [Xen-announce] Xen Security Advisory 102 (CVE-2014-5147) - Flaws in handling traps from 32-bit userspace on 64-bit ARM X-BeenThere: xen-announce@lists.xen.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: "Xen announcements \(low volume\)" List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-announce-bounces@lists.xen.org Errors-To: xen-announce-bounces@lists.xen.org --=separator Content-Type: text/plain; charset="utf-8" Content-Disposition: inline Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Xen Security Advisory CVE-2014-5147 / XSA-102 version 3 Flaws in handling traps from 32-bit userspace on 64-bit ARM UPDATES IN VERSION 3 ==================== Public release. ISSUE DESCRIPTION ================= When handling a trap from guest mode on ARM, Xen asserts that the current guest mode must match the domain address width. This assertion is false when a guest takes a trap from a 32-bit userspace running on a 64-bit kernel in a 64-bit domain. IMPACT ====== Any user in a guest which is running a 64-bit kernel who is able to spawn a 32-bit process can crash the host. I.e. an unprivileged guest user can cause host-wide denial of service. VULNERABLE SYSTEMS ================== 32-bit ARM systems and and X86 systems are not vulnerable. 64-bit ARM systems which support 32-bit userspace are vulnerable. Not all 64-bit ARM CPUs support 32-bit userspace in the actual CPU hardware. Systems without that hardware support are not vulnerable. Also, not all 64-bit ARM guest kernels have support for 32-bit userspace. Systems without that kernel support are vulnerable to a malicious guest administrator, but not to an unprivileged guest user. MITIGATION ========== On systems where the guest kernel is controlled by the host rather than guest administrator, running only 32-bit kernels. On systems where the guest kernel is controlled by the host rather than guest administrator, running 64-bit kernels with support for 32-bit userspace disabled (e.g CONFIG_COMPAT=n under Linux) will prevent untrusted guest users from exploting this issue. However untrusted guest administrators can still trigger it unless further steps are taken to prevent them from loading code into the kernel (e.g. by disabling loadable modules etc) or from using other mechanisms which allow them to run code at kernel privilege. CREDITS ======= This issue was reported as a bug by Riku Voipio, discovered via Linaro's LAVA testing and was diagnosed as a security issue by Ian Campbell. RESOLUTION ========== Applying the appropriate attached patches resolves these security issues. xsa102-unstable-*.patch xen-unstable xsa102-4.4-*.patch Xen 4.4.x $ sha256sum xsa102*.patch a5beb5c552e5bffe3e115905c478d6699c35df1d8721f8d6681099c38a974091 xsa102-4.4-01.patch 9f04ecda4dd9e31360daa27d87588d6017d866a97b84566241097def0af86a63 xsa102-4.4-02.patch a9860803ed5ed57bdc3ac94cdc924618b19e805b7f6a87bf9c1a9ea4b627281a xsa102-4.4-03.patch 7d0b5e05e5915c6c2d83590ba9acab0acfd1eba986a65a20ba69cf2c3394e062 xsa102-unstable-01.patch 7d5cf339a3f8c98b3e06852f845a2305df3f8ce195d243ee22d6783bb6904d60 xsa102-unstable-02.patch 3ca7b0632af36cc72ba59ed1822bcaebf2363f150435348265d1ade25e21bf90 xsa102-unstable-03.patch $ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJT6hBqAAoJEIP+FMlX6CvZDi0H/jFJPRxBIglzATvMDaho19fw Ao1OHP99dZn3XkKf/qfw4v90KttCEp5+3uQo34hhXNTLkvbm5KCsZDjOdL812d3G JjvEBWnU7480Av0QkvsYVoH+yjks0PIu6xEI+kQqKAAG4vbVxTi5ORg7HMkeOKAY 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Tue, 12 Aug 2014 13:04:46 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1XHBjx-0002mJ-0a; Tue, 12 Aug 2014 13:03:49 +0000 Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1XHBjo-0002hn-V4; Tue, 12 Aug 2014 13:03:41 +0000 Received: from [85.158.143.35:59587] by server-1.bemta-4.messagelabs.com id 90/08-05872-AA01AE35; Tue, 12 Aug 2014 13:03:38 +0000 X-Env-Sender: iwj@xenbits.xen.org X-Msg-Ref: server-4.tower-21.messagelabs.com!1407848617!12523410!1 X-Originating-IP: [50.57.168.107] X-SpamReason: No, hits=0.5 required=7.0 tests=BODY_RANDOM_LONG X-StarScan-Received: X-StarScan-Version: 6.12.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 20524 invoked from network); 12 Aug 2014 13:03:38 -0000 Received: from mail.xen.org (HELO mail.xen.org) (50.57.168.107) by server-4.tower-21.messagelabs.com with AES256-SHA encrypted SMTP; 12 Aug 2014 13:03:38 -0000 Received: from xenbits.xen.org ([50.57.170.242]) by mail.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1XHBjh-0004GT-CR; Tue, 12 Aug 2014 13:03:33 +0000 Received: from iwj by xenbits.xen.org with local (Exim 4.72) (envelope-from ) id 1XHBjh-00087j-Aj; Tue, 12 Aug 2014 13:03:33 +0000 Date: Tue, 12 Aug 2014 13:03:33 +0000 Message-Id: Content-Type: multipart/mixed; boundary="=separator"; charset="utf-8" Content-Transfer-Encoding: binary MIME-Version: 1.0 X-Mailer: MIME-tools 5.428 (Entity 5.428) To: xen-announce@lists.xen.org, xen-devel@lists.xen.org, xen-users@lists.xen.org, oss-security@lists.openwall.com From: Xen.org security team Cc: "Xen.org security team" Subject: [Xen-announce] Xen Security Advisory 103 (CVE-2014-5148) - Flaw in handling unknown system register access from 64-bit userspace on ARM X-BeenThere: xen-announce@lists.xen.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: "Xen announcements \(low volume\)" List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-announce-bounces@lists.xen.org Errors-To: xen-announce-bounces@lists.xen.org --=separator Content-Type: text/plain; charset="utf-8" Content-Disposition: inline Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Xen Security Advisory CVE-2014-5148 / XSA-103 version 3 Flaw in handling unknown system register access from 64-bit userspace on ARM UPDATES IN VERSION 3 ==================== Public release. ISSUE DESCRIPTION ================= When handling an unknown system register access from 64-bit userspace Xen would incorrectly return to the second instruction of the trap handler for faults in kernel space rather than the first instruction of the trap handler for faults in 64-bit userspace. Any user in a guest which is running a 64-bit kernel who is able to spawn a 64-bit process can cause a trap to the kernel to be taken at an unexpected (but not user controlled) exception address. Known versions of Linux in the default configuration will Oops and kill the offending process, and therefore avoid this vulnerability. However local configuration may turn such an Oops into a kernel panic, and therefore a guest denial of service. IMPACT ====== Depending on the guest kernel implementation, kernel crash (guest DoS) or privilege elevation to that of the guest kernel cannot be ruled out. This issue does not enable an attack on the host. VULNERABLE SYSTEMS ================== 64-bit ARM systems may be vulnerable, depending on the guest kernel. All versions of Linux released by Linux upstream to date avoid this vulnerability. Systems based on modified versions of Linux may be vulnerable. 32-bit ARM systems, and X86 systems, are not vulnerable. MITIGATION ========== There is no known mitigation for this issue. CREDITS ======= This issue was reported as a bug by Riku Voipio, discovered via Linaro's LAVA testing and was diagnosed as a security issue by Ian Campbell. RESOLUTION ========== Applying the appropriate attached patch resolves this issue. The patch for XSA-103 (specifically, xsa102-*-02.patch) must be applied first. xsa103-unstable.patch xen-unstable xsa103-4.4.patch Xen 4.4.x $ sha256sum xsa103*.patch fee2e0be91d08aa28ba44b616edd99a1bfcdec419966c3f9e843a842d649e4ea xsa103-4.4.patch 838d059618d31b272ec10ac8cbb6613a68b634c98418aff2a33cd514ed06b55a xsa103-unstable.patch $ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJT6hBtAAoJEIP+FMlX6CvZ6+sIAMiAJEzJl2pWk61kr3QT1llk lYYEEX94QxxJIzg62o4RnMzYZXsmOT6y2YP62nEziRbBaFcgmB0bNrx+Qc52+QWk iea2lYAJUGmEdwnY6x2raLF6Wd2alCjZxXF1UzSJJ6Vu8WiTNFXHI+mKlc9JY4bN aStmfgvN3j6Nmjav8k9ar/8QVfc4Oe0xOlzwFt5DlNHewExWN1y+HtPnrBTkGu5K ckgjvbxs4/SF4No59XqY0XxdpEDIEXo46keJ07DG6/nVzIl83ZtpBhxiNX8xfz91 ZYzu6feGbgtvy1+utxo/l3qBAn7TrDXn58mLTgKTM2dD3D4Crv9tKLuOXF1xVLM= =hjBc -----END PGP SIGNATURE----- --=separator Content-Type: application/octet-stream; name="xsa103-4.4.patch" Content-Disposition: attachment; filename="xsa103-4.4.patch" Content-Transfer-Encoding: base64 RnJvbSBiMzA3NWJlYjE4OGY2ZmQxY2I1MzIyNTA1Zjc2MzdkM2RlNmNmZDQx IE1vbiBTZXAgMTcgMDA6MDA6MDAgMjAwMQpGcm9tOiBJYW4gSmFja3NvbiA8 aWFuLmphY2tzb25AZXUuY2l0cml4LmNvbT4KRGF0ZTogVGh1LCAyNCBKdWwg MjAxNCAxNzoyMToxNSArMDEwMApTdWJqZWN0OiBbUEFUQ0hdIHhlbjogYXJt OiBDb3JyZWN0bHkgaGFuZGxlIGRvX3N5c3JlZyBleGNlcHRpb24gaW5qZWN0 aW9uCiBmcm9tIDY0LWJpdCB1c2Vyc3BhY2UKClRoZSBkb19zeXNyZWcgY2Fz ZSB3YXMgbWlzc2luZyBhIHJldHVybiwgc28gaXQgd291bGQgaW5jcmVtZW50 IFBDIGFuZAppbmplY3QgdGhlIHRyYXAgdG8gdGhlIHNlY29uZCBpbnN0cnVj dGlvbiBvZiB0aGUgaGFuZGxlci4KCihUaGlzIHBhdGNoIG5lZWRzIHRvIGJl IGFwcGxpZWQgb24gdG9wIG9mIHhzYTEwMi00LjQtMDIucGF0Y2guKQoKVGhp cyBpcyBYU0EtMTAzLgoKU2lnbmVkLW9mZi1ieTogSWFuIENhbXBiZWxsIDxp YW4uY2FtcGJlbGxAY2l0cml4LmNvbT4KU2lnbmVkLW9mZi1ieTogSWFuIEph Y2tzb24gPGlhbi5qYWNrc29uQGV1LmNpdHJpeC5jb20+CkFja2VkLWJ5OiBK dWxpZW4gR3JhbGwgPGp1bGllbi5ncmFsbEBsaW5hcm8ub3JnPgotLS0KIHhl bi9hcmNoL2FybS90cmFwcy5jIHwgICAgMSArCiAxIGZpbGUgY2hhbmdlZCwg MSBpbnNlcnRpb24oKykKCmRpZmYgLS1naXQgYS94ZW4vYXJjaC9hcm0vdHJh cHMuYyBiL3hlbi9hcmNoL2FybS90cmFwcy5jCmluZGV4IGU3NjNmMTIuLjRj OTEwYzggMTAwNjQ0Ci0tLSBhL3hlbi9hcmNoL2FybS90cmFwcy5jCisrKyBi L3hlbi9hcmNoL2FybS90cmFwcy5jCkBAIC0xNjgzLDYgKzE2ODMsNyBAQCBz dGF0aWMgdm9pZCBkb19zeXNyZWcoc3RydWN0IGNwdV91c2VyX3JlZ3MgKnJl Z3MsCiAgICAgICAgICAgICAgICAgICAgICBoc3IuYml0cyAmIEhTUl9TWVNS RUdfUkVHU19NQVNLKTsKICNlbmRpZgogICAgICAgICAgICAgaW5qZWN0X3Vu ZGVmX2V4Y2VwdGlvbihyZWdzLCBzeXNyZWcubGVuKTsKKyAgICAgICAgICAg IHJldHVybjsKICAgICAgICAgfQogICAgIH0KIAotLSAKMS43LjEwLjQKCg== --=separator Content-Type: application/octet-stream; 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charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Xen-announce mailing list Xen-announce@lists.xen.org http://lists.xen.org/xen-announce --=separator-- From xen-announce-bounces@lists.xen.org Tue Aug 12 13:04:46 2014 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Tue, 12 Aug 2014 13:04:46 +0000 Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1XHBjn-0002hQ-21; Tue, 12 Aug 2014 13:03:39 +0000 Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1XHBjk-0002h7-Rv; Tue, 12 Aug 2014 13:03:37 +0000 Received: from [85.158.143.35:37909] by server-2.bemta-4.messagelabs.com id 38/2F-04525-7A01AE35; Tue, 12 Aug 2014 13:03:35 +0000 X-Env-Sender: iwj@xenbits.xen.org X-Msg-Ref: server-2.tower-21.messagelabs.com!1407848613!4531815!1 X-Originating-IP: [50.57.168.107] X-SpamReason: No, hits=0.5 required=7.0 tests=BODY_RANDOM_LONG X-StarScan-Received: X-StarScan-Version: 6.12.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 3540 invoked from network); 12 Aug 2014 13:03:34 -0000 Received: from mail.xen.org (HELO mail.xen.org) (50.57.168.107) by server-2.tower-21.messagelabs.com with AES256-SHA encrypted SMTP; 12 Aug 2014 13:03:34 -0000 Received: from xenbits.xen.org ([50.57.170.242]) by mail.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1XHBjb-0004G0-6c; Tue, 12 Aug 2014 13:03:27 +0000 Received: from iwj by xenbits.xen.org with local (Exim 4.72) (envelope-from ) id 1XHBja-00085c-GD; Tue, 12 Aug 2014 13:03:26 +0000 Date: Tue, 12 Aug 2014 13:03:26 +0000 Message-Id: Content-Type: multipart/mixed; boundary="=separator"; charset="utf-8" Content-Transfer-Encoding: binary MIME-Version: 1.0 X-Mailer: MIME-tools 5.428 (Entity 5.428) To: xen-announce@lists.xen.org, xen-devel@lists.xen.org, xen-users@lists.xen.org, oss-security@lists.openwall.com From: Xen.org security team Cc: "Xen.org security team" Subject: [Xen-announce] Xen Security Advisory 97 (CVE-2014-5146, CVE-2014-5149) - Long latency virtual-mmu operations are not preemptible X-BeenThere: xen-announce@lists.xen.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: "Xen announcements \(low volume\)" List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-announce-bounces@lists.xen.org Errors-To: xen-announce-bounces@lists.xen.org --=separator Content-Type: text/plain; charset="utf-8" Content-Disposition: inline Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Xen Security Advisory CVE-2014-5146,CVE-2014-5149 / XSA-97 version 3 Long latency virtual-mmu operations are not preemptible UPDATES IN VERSION 3 ==================== Public release. ISSUE DESCRIPTION ================= Some MMU virtualization operations on HVM guests must process every page assigned to a guest. For larger guests, this can tie up a vcpu for a significant amount of time, as the operations are not preemptible. For guests using Hardware Assisted Paging (HAP, see below) this is CVE-2014-5146. For guests not using HAP this is CVE-2014-5149. IMPACT ====== A malicious HVM guest with a large allocation of shadow/p2m RAM can mount a denial of service attack affecting the whole system. VULNERABLE SYSTEMS ================== ARM systems are not vulnerable. All x86 Xen versions are vulnerable. The vulnerability is only exposed to HVM guests. In the default configuration, the vulnerability is only exposed to large guests (guests assigned more than 128Gbytes of memory). MITIGATION ========== Running only PV guests, or only smaller guests will avoid this problem. Since the vulnerability actually depends on the guest's shadow memory, if you are overriding the default allocation (which is about 0.5% of guest RAM) by using the "shadow_memory=" VM configuration file option, you should adjust your idea of a 'smaller' guest accordingly. CREDITS ======= This issue was discovered by Jan Beulich. RESOLUTION ========== For HAP-enabled guests, the attached patch resolves ths issue. HAP (Hardware Assisted Paging, aka nested paging) is enabled by default if the system is suitably capable. The VM configuration file can disable or enable HAP explicitly by setting "hap=0" or "hap=1". HAP can also be globally disabled by specifying "hap=off" on the hypervisor command line. There is no resolution for guests using shadow pagetables (i.e., not using HAP) at this time. xsa97-hap-unstable.patch xen-unstable xsa97-hap-4.4.patch Xen 4.4.x xsa97-hap-4.3.patch Xen 4.3.x xsa97-hap-4.2-prereq.patch, xsa97-hap-4.2.patch Xen 4.2.x $ sha256sum xsa97*.patch c9e0e9f136db1b976ea371be10430598a7f21b4a33b4849f2081566657ff5da1 xsa97-hap-4.2.patch c525a99263eed6f93fad685ae9dad1ae10c8930345ec52659211541640797bb5 xsa97-hap-4.2-prereq.patch cfab6521221a5058a0dfbb6d59c3c4cd0e7f4239bb6cbee2723de22c33caafda xsa97-hap-4.3.patch 138511f2fd8362366e09dda18443387886ec4397eecc1a2f6a7e85643bd415e8 xsa97-hap-4.4.patch 58c56daa01f20be0317700d383dfbba8de35695bd38a9860c0c0463181d76351 xsa97-hap-unstable.patch $ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJT6hBmAAoJEIP+FMlX6CvZ8sgIAIqtUEu6CS5+H3enavmmLhuh PGLCqQOBVWn99+m6bMqk+WvZOkW9CLxiX6+78XsheJlmUFBtHc3rG53wR0voo6Vr BXyU3XY2n4aEh1klstS3gq/J37L86fEi2a+MaAePbPZ4qdWvFh3zDhRrLTQ/TDvK 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+0000 Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1XHBjk-0002h7-Rv; Tue, 12 Aug 2014 13:03:37 +0000 Received: from [85.158.143.35:37909] by server-2.bemta-4.messagelabs.com id 38/2F-04525-7A01AE35; Tue, 12 Aug 2014 13:03:35 +0000 X-Env-Sender: iwj@xenbits.xen.org X-Msg-Ref: server-2.tower-21.messagelabs.com!1407848613!4531815!1 X-Originating-IP: [50.57.168.107] X-SpamReason: No, hits=0.5 required=7.0 tests=BODY_RANDOM_LONG X-StarScan-Received: X-StarScan-Version: 6.12.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 3540 invoked from network); 12 Aug 2014 13:03:34 -0000 Received: from mail.xen.org (HELO mail.xen.org) (50.57.168.107) by server-2.tower-21.messagelabs.com with AES256-SHA encrypted SMTP; 12 Aug 2014 13:03:34 -0000 Received: from xenbits.xen.org ([50.57.170.242]) by mail.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1XHBjb-0004G0-6c; Tue, 12 Aug 2014 13:03:27 +0000 Received: from iwj by xenbits.xen.org with local (Exim 4.72) (envelope-from ) id 1XHBja-00085c-GD; Tue, 12 Aug 2014 13:03:26 +0000 Date: Tue, 12 Aug 2014 13:03:26 +0000 Message-Id: Content-Type: multipart/mixed; boundary="=separator"; charset="utf-8" Content-Transfer-Encoding: binary MIME-Version: 1.0 X-Mailer: MIME-tools 5.428 (Entity 5.428) To: xen-announce@lists.xen.org, xen-devel@lists.xen.org, xen-users@lists.xen.org, oss-security@lists.openwall.com From: Xen.org security team Cc: "Xen.org security team" Subject: [Xen-announce] Xen Security Advisory 97 (CVE-2014-5146, CVE-2014-5149) - Long latency virtual-mmu operations are not preemptible X-BeenThere: xen-announce@lists.xen.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: "Xen announcements \(low volume\)" List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-announce-bounces@lists.xen.org Errors-To: xen-announce-bounces@lists.xen.org --=separator Content-Type: text/plain; charset="utf-8" Content-Disposition: inline Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Xen Security Advisory CVE-2014-5146,CVE-2014-5149 / XSA-97 version 3 Long latency virtual-mmu operations are not preemptible UPDATES IN VERSION 3 ==================== Public release. ISSUE DESCRIPTION ================= Some MMU virtualization operations on HVM guests must process every page assigned to a guest. For larger guests, this can tie up a vcpu for a significant amount of time, as the operations are not preemptible. For guests using Hardware Assisted Paging (HAP, see below) this is CVE-2014-5146. For guests not using HAP this is CVE-2014-5149. IMPACT ====== A malicious HVM guest with a large allocation of shadow/p2m RAM can mount a denial of service attack affecting the whole system. VULNERABLE SYSTEMS ================== ARM systems are not vulnerable. All x86 Xen versions are vulnerable. The vulnerability is only exposed to HVM guests. In the default configuration, the vulnerability is only exposed to large guests (guests assigned more than 128Gbytes of memory). MITIGATION ========== Running only PV guests, or only smaller guests will avoid this problem. Since the vulnerability actually depends on the guest's shadow memory, if you are overriding the default allocation (which is about 0.5% of guest RAM) by using the "shadow_memory=" VM configuration file option, you should adjust your idea of a 'smaller' guest accordingly. CREDITS ======= This issue was discovered by Jan Beulich. RESOLUTION ========== For HAP-enabled guests, the attached patch resolves ths issue. HAP (Hardware Assisted Paging, aka nested paging) is enabled by default if the system is suitably capable. The VM configuration file can disable or enable HAP explicitly by setting "hap=0" or "hap=1". HAP can also be globally disabled by specifying "hap=off" on the hypervisor command line. There is no resolution for guests using shadow pagetables (i.e., not using HAP) at this time. xsa97-hap-unstable.patch xen-unstable xsa97-hap-4.4.patch Xen 4.4.x xsa97-hap-4.3.patch Xen 4.3.x xsa97-hap-4.2-prereq.patch, xsa97-hap-4.2.patch Xen 4.2.x $ sha256sum xsa97*.patch c9e0e9f136db1b976ea371be10430598a7f21b4a33b4849f2081566657ff5da1 xsa97-hap-4.2.patch c525a99263eed6f93fad685ae9dad1ae10c8930345ec52659211541640797bb5 xsa97-hap-4.2-prereq.patch cfab6521221a5058a0dfbb6d59c3c4cd0e7f4239bb6cbee2723de22c33caafda xsa97-hap-4.3.patch 138511f2fd8362366e09dda18443387886ec4397eecc1a2f6a7e85643bd415e8 xsa97-hap-4.4.patch 58c56daa01f20be0317700d383dfbba8de35695bd38a9860c0c0463181d76351 xsa97-hap-unstable.patch $ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJT6hBmAAoJEIP+FMlX6CvZ8sgIAIqtUEu6CS5+H3enavmmLhuh PGLCqQOBVWn99+m6bMqk+WvZOkW9CLxiX6+78XsheJlmUFBtHc3rG53wR0voo6Vr BXyU3XY2n4aEh1klstS3gq/J37L86fEi2a+MaAePbPZ4qdWvFh3zDhRrLTQ/TDvK 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+0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1XHBjm-0002hK-Ij; Tue, 12 Aug 2014 13:03:38 +0000 Received: from [85.158.139.211:24658] by server-6.bemta-5.messagelabs.com id ED/D3-06284-9A01AE35; Tue, 12 Aug 2014 13:03:37 +0000 X-Env-Sender: iwj@xenbits.xen.org X-Msg-Ref: server-6.tower-206.messagelabs.com!1407848615!10884061!1 X-Originating-IP: [50.57.168.107] X-SpamReason: No, hits=0.5 required=7.0 tests=BODY_RANDOM_LONG X-StarScan-Received: X-StarScan-Version: 6.12.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 5226 invoked from network); 12 Aug 2014 13:03:36 -0000 Received: from mail.xen.org (HELO mail.xen.org) (50.57.168.107) by server-6.tower-206.messagelabs.com with AES256-SHA encrypted SMTP; 12 Aug 2014 13:03:36 -0000 Received: from xenbits.xen.org ([50.57.170.242]) by mail.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1XHBje-0004GD-I1; Tue, 12 Aug 2014 13:03:30 +0000 Received: from iwj by xenbits.xen.org with local (Exim 4.72) (envelope-from ) id 1XHBje-00086k-FW; Tue, 12 Aug 2014 13:03:30 +0000 Date: Tue, 12 Aug 2014 13:03:30 +0000 Message-Id: Content-Type: multipart/mixed; boundary="=separator"; charset="utf-8" Content-Transfer-Encoding: binary MIME-Version: 1.0 X-Mailer: MIME-tools 5.428 (Entity 5.428) To: xen-announce@lists.xen.org, xen-devel@lists.xen.org, xen-users@lists.xen.org, oss-security@lists.openwall.com From: Xen.org security team Cc: "Xen.org security team" Subject: [Xen-announce] Xen Security Advisory 102 (CVE-2014-5147) - Flaws in handling traps from 32-bit userspace on 64-bit ARM X-BeenThere: xen-announce@lists.xen.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: "Xen announcements \(low volume\)" List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-announce-bounces@lists.xen.org Errors-To: xen-announce-bounces@lists.xen.org --=separator Content-Type: text/plain; charset="utf-8" Content-Disposition: inline Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Xen Security Advisory CVE-2014-5147 / XSA-102 version 3 Flaws in handling traps from 32-bit userspace on 64-bit ARM UPDATES IN VERSION 3 ==================== Public release. ISSUE DESCRIPTION ================= When handling a trap from guest mode on ARM, Xen asserts that the current guest mode must match the domain address width. This assertion is false when a guest takes a trap from a 32-bit userspace running on a 64-bit kernel in a 64-bit domain. IMPACT ====== Any user in a guest which is running a 64-bit kernel who is able to spawn a 32-bit process can crash the host. I.e. an unprivileged guest user can cause host-wide denial of service. VULNERABLE SYSTEMS ================== 32-bit ARM systems and and X86 systems are not vulnerable. 64-bit ARM systems which support 32-bit userspace are vulnerable. Not all 64-bit ARM CPUs support 32-bit userspace in the actual CPU hardware. Systems without that hardware support are not vulnerable. Also, not all 64-bit ARM guest kernels have support for 32-bit userspace. Systems without that kernel support are vulnerable to a malicious guest administrator, but not to an unprivileged guest user. MITIGATION ========== On systems where the guest kernel is controlled by the host rather than guest administrator, running only 32-bit kernels. On systems where the guest kernel is controlled by the host rather than guest administrator, running 64-bit kernels with support for 32-bit userspace disabled (e.g CONFIG_COMPAT=n under Linux) will prevent untrusted guest users from exploting this issue. However untrusted guest administrators can still trigger it unless further steps are taken to prevent them from loading code into the kernel (e.g. by disabling loadable modules etc) or from using other mechanisms which allow them to run code at kernel privilege. CREDITS ======= This issue was reported as a bug by Riku Voipio, discovered via Linaro's LAVA testing and was diagnosed as a security issue by Ian Campbell. RESOLUTION ========== Applying the appropriate attached patches resolves these security issues. xsa102-unstable-*.patch xen-unstable xsa102-4.4-*.patch Xen 4.4.x $ sha256sum xsa102*.patch a5beb5c552e5bffe3e115905c478d6699c35df1d8721f8d6681099c38a974091 xsa102-4.4-01.patch 9f04ecda4dd9e31360daa27d87588d6017d866a97b84566241097def0af86a63 xsa102-4.4-02.patch a9860803ed5ed57bdc3ac94cdc924618b19e805b7f6a87bf9c1a9ea4b627281a xsa102-4.4-03.patch 7d0b5e05e5915c6c2d83590ba9acab0acfd1eba986a65a20ba69cf2c3394e062 xsa102-unstable-01.patch 7d5cf339a3f8c98b3e06852f845a2305df3f8ce195d243ee22d6783bb6904d60 xsa102-unstable-02.patch 3ca7b0632af36cc72ba59ed1822bcaebf2363f150435348265d1ade25e21bf90 xsa102-unstable-03.patch $ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJT6hBqAAoJEIP+FMlX6CvZDi0H/jFJPRxBIglzATvMDaho19fw Ao1OHP99dZn3XkKf/qfw4v90KttCEp5+3uQo34hhXNTLkvbm5KCsZDjOdL812d3G JjvEBWnU7480Av0QkvsYVoH+yjks0PIu6xEI+kQqKAAG4vbVxTi5ORg7HMkeOKAY 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