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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.1687 Important: qemu-kvm security update 6 July 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: qemu-kvm Publisher: Red Hat Operating System: Red Hat Enterprise Linux Server 7 Red Hat Enterprise Linux WS/Desktop 7 Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2017-9524 Original Bulletin: https://access.redhat.com/errata/RHSA-2017:1681 Comment: This advisory references vulnerabilities in products which run on platforms other than Red Hat. It is recommended that administrators running qemu-kvm check for an updated version of the software for their operating system. - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: qemu-kvm security update Advisory ID: RHSA-2017:1681-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2017:1681 Issue date: 2017-07-05 CVE Names: CVE-2017-9524 ===================================================================== 1. Summary: An update for qemu-kvm is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux Client (v. 7) - x86_64 Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64 Red Hat Enterprise Linux Server (v. 7) - ppc64, ppc64le, x86_64 Red Hat Enterprise Linux Workstation (v. 7) - x86_64 3. Description: Kernel-based Virtual Machine (KVM) is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm package provides the user-space component for running virtual machines that use KVM. Security Fix(es): * Quick Emulator (QEMU) built with Network Block Device (NBD) Server support was vulnerable to a null-pointer dereference issue. The flaw could occur when releasing a client, which was not initialized due to failed negotiation. A remote user or process could exploit this flaw to crash the qemu-nbd server (denial of service). (CVE-2017-9524) 4. Solution: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, shut down all running virtual machines. Once all virtual machines have shut down, start them again for this update to take effect. 5. Bugs fixed (https://bugzilla.redhat.com/): 1460170 - CVE-2017-9524 Qemu: nbd: segmentation fault due to client non-negotiation 6. Package List: Red Hat Enterprise Linux Client (v. 7): Source: qemu-kvm-1.5.3-126.el7_3.10.src.rpm x86_64: qemu-img-1.5.3-126.el7_3.10.x86_64.rpm qemu-kvm-1.5.3-126.el7_3.10.x86_64.rpm qemu-kvm-common-1.5.3-126.el7_3.10.x86_64.rpm qemu-kvm-debuginfo-1.5.3-126.el7_3.10.x86_64.rpm qemu-kvm-tools-1.5.3-126.el7_3.10.x86_64.rpm Red Hat Enterprise Linux ComputeNode Optional (v. 7): Source: qemu-kvm-1.5.3-126.el7_3.10.src.rpm x86_64: qemu-img-1.5.3-126.el7_3.10.x86_64.rpm qemu-kvm-1.5.3-126.el7_3.10.x86_64.rpm qemu-kvm-common-1.5.3-126.el7_3.10.x86_64.rpm qemu-kvm-debuginfo-1.5.3-126.el7_3.10.x86_64.rpm qemu-kvm-tools-1.5.3-126.el7_3.10.x86_64.rpm Red Hat Enterprise Linux Server (v. 7): Source: qemu-kvm-1.5.3-126.el7_3.10.src.rpm ppc64: qemu-img-1.5.3-126.el7_3.10.ppc64.rpm qemu-kvm-debuginfo-1.5.3-126.el7_3.10.ppc64.rpm ppc64le: qemu-img-1.5.3-126.el7_3.10.ppc64le.rpm qemu-kvm-debuginfo-1.5.3-126.el7_3.10.ppc64le.rpm x86_64: qemu-img-1.5.3-126.el7_3.10.x86_64.rpm qemu-kvm-1.5.3-126.el7_3.10.x86_64.rpm qemu-kvm-common-1.5.3-126.el7_3.10.x86_64.rpm qemu-kvm-debuginfo-1.5.3-126.el7_3.10.x86_64.rpm qemu-kvm-tools-1.5.3-126.el7_3.10.x86_64.rpm Red Hat Enterprise Linux Workstation (v. 7): Source: qemu-kvm-1.5.3-126.el7_3.10.src.rpm x86_64: qemu-img-1.5.3-126.el7_3.10.x86_64.rpm qemu-kvm-1.5.3-126.el7_3.10.x86_64.rpm qemu-kvm-common-1.5.3-126.el7_3.10.x86_64.rpm qemu-kvm-debuginfo-1.5.3-126.el7_3.10.x86_64.rpm qemu-kvm-tools-1.5.3-126.el7_3.10.x86_64.rpm These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/ 7. References: https://access.redhat.com/security/cve/CVE-2017-9524 https://access.redhat.com/security/updates/classification/#important 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2017 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iD8DBQFZXMhWXlSAg2UNWIIRAvdcAJ4urVUBx0tkyHKe+zLAzuM8I7fD0ACcDAlN 1aD0i9ZEUbI21Q8ihTuWhSA= =TE+9 - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). 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