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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.1495 Important: qemu-kvm-rhev security and bug fix update 15 June 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: qemu-kvm-rhev Publisher: Red Hat Operating System: Red Hat Enterprise Linux Server 6 Impact/Access: Execute Arbitrary Code/Commands -- Existing Account Denial of Service -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2017-7980 CVE-2017-7718 CVE-2017-2633 CVE-2016-9603 Reference: ESB-2017.1477 ESB-2017.1476 ESB-2017.1263 ESB-2017.1017 ESB-2017.0987 Original Bulletin: https://access.redhat.com/errata/RHSA-2017:1441 - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: qemu-kvm-rhev security and bug fix update Advisory ID: RHSA-2017:1441-01 Product: Red Hat Enterprise Linux OpenStack Platform Advisory URL: https://access.redhat.com/errata/RHSA-2017:1441 Issue date: 2017-06-14 CVE Names: CVE-2016-9603 CVE-2017-2633 CVE-2017-7718 CVE-2017-7980 ===================================================================== 1. Summary: An update for qemu-kvm-rhev is now available for Red Hat Enterprise Linux OpenStack Platform 5.0 (Icehouse) for RHEL 6. 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 OpenStack Platform 5.0 (Icehouse) for RHEL 6 - x86_64 3. Description: KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm-rhev packages provide the user-space component for running virtual machines that use KVM in environments managed by Red Hat products. Security Fix(es): * A heap buffer overflow flaw was found in QEMU's Cirrus CLGD 54xx VGA emulator's VNC display driver support; the issue could occur when a VNC client attempted to update its display after a VGA operation is performed by a guest. A privileged user/process inside a guest could use this flaw to crash the QEMU process or, potentially, execute arbitrary code on the host with privileges of the QEMU process. (CVE-2016-9603) * An out-of-bounds r/w access issue was found in QEMU's Cirrus CLGD 54xx VGA Emulator support. The vulnerability could occur while copying VGA data via various bitblt functions. A privileged user inside a guest could use this flaw to crash the QEMU process or, potentially, execute arbitrary code on the host with privileges of the QEMU process. (CVE-2017-7980) * An out-of-bounds memory access issue was found in QEMU's VNC display driver support. The vulnerability could occur while refreshing the VNC display surface area in the 'vnc_refresh_server_surface'. A user/process inside a guest could use this flaw to crash the QEMU process, resulting in a denial of service. (CVE-2017-2633) * An out-of-bounds access issue was found in QEMU's Cirrus CLGD 54xx VGA Emulator support. The vulnerability could occur while copying VGA data using bitblt functions (for example, cirrus_bitblt_rop_fwd_transp_). A privileged user inside a guest could use this flaw to crash the QEMU process, resulting in denial of service. (CVE-2017-7718) Red Hat would like to thank Jiangxin (PSIRT Huawei Inc.) and Li Qiang (Qihoo 360 Gear Team) for reporting CVE-2017-7980 and Jiangxin (PSIRT Huawei Inc.) for reporting CVE-2017-7718. 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/): 1425939 - CVE-2017-2633 Qemu: VNC: memory corruption due to unchecked resolution limit 1430056 - CVE-2016-9603 Qemu: cirrus: heap buffer overflow via vnc connection 1442810 - Rebase qemu-kvm-rhev for OSP 5 on RHEL 6 1443441 - CVE-2017-7718 Qemu: display: cirrus: OOB read access issue 1444371 - CVE-2017-7980 Qemu: display: cirrus: OOB r/w access issues in bitblt routines 6. Package List: Red Hat Enterprise Linux OpenStack Platform 5.0 (Icehouse) for RHEL 6: Source: qemu-kvm-rhev-0.12.1.2-2.503.el6_9.3.src.rpm x86_64: qemu-img-rhev-0.12.1.2-2.503.el6_9.3.x86_64.rpm qemu-kvm-rhev-0.12.1.2-2.503.el6_9.3.x86_64.rpm qemu-kvm-rhev-debuginfo-0.12.1.2-2.503.el6_9.3.x86_64.rpm qemu-kvm-rhev-tools-0.12.1.2-2.503.el6_9.3.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-2016-9603 https://access.redhat.com/security/cve/CVE-2017-2633 https://access.redhat.com/security/cve/CVE-2017-7718 https://access.redhat.com/security/cve/CVE-2017-7980 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 iD8DBQFZQbVsXlSAg2UNWIIRAsSfAKCTnRma/FAeYjYERG42X1bwvgwJKwCggSR2 R0J0YiYspgitMK0DsK+dgLg= =ZfYa - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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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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