-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: qemu-kvm-rhev security, bug fix, and enhancement update Advisory ID: RHSA-2017:0985-01 Product: Red Hat Virtualization Advisory URL: https://access.redhat.com/errata/RHSA-2017:0985 Issue date: 2017-04-18 CVE Names: CVE-2016-9603 ===================================================================== 1. Summary: An update for qemu-kvm-rhev is now available for Red Hat Virtualization Hypervisor 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: Managment Agent for RHEL 7 Hosts - ppc64le, x86_64 RHEV-H and VDSM for 7 Hosts - ppc64le, x86_64 3. Description: KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on AMD64 and Intel 64 systems. The qemu-kvm-rhev packages provide the user-space component for running virtual machines using KVM in environments managed by Red Hat Virtualization Manager. Security Fix(es): * Quick Emulator (QEMU), built with the Cirrus CLGD 54xx VGA Emulator and the VNC display driver support, is vulnerable to a heap buffer overflow issue. The issue could occur when a VNC client attempts to update its display after a VGA operation is performed by a guest. A privileged user/process inside guest could use this flaw to crash the QEMU process resulting in DoS or, potentially, leverage it to execute arbitrary code on the host with privileges of the QEMU process. (CVE-2016-9603) Bug Fix(es): * When attempting to use a virtual CPU with the "invtsc" feature, the "nonstop_tsc" flag was not set for the guest. This update adjusts the flag to be migrateable, and "nonstop_tsc" is now properly set when requested. (BZ#1413897) * Previously, the QEMU emulator failed to open disk images with backing files stored on a Gluster volume. This update ensures that QEMU is able to handle Gluster disk URIs correctly, and the problem no longer occurs. (BZ#1425125) * Prior to this update, creating a new GlusterFS instance in some cases consumed an excessive amount of memory. This update reuses data for existing GlusterFS volumes, which reduces the memory consumption when creating new instances. (BZ#1413044) * Under certain circumstances, guest machines previously encountered I/O errors or were paused when a large number of block transfer actions was being performed. With this update, QEMU ensures that the number of block transfers does not exceed the host limit, which prevents the described problem. (BZ#1431149) Enhancement(s): * The QEMU emulator is now able to present virtual L3 cache information to the guest. This improves the performance and stability of tasks and processes that use L3 cache, such as SAP HANA. (BZ#1430802) 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/): 1413044 - block-gluster: use one glfs instance per volume 1413897 - cpu flag nonstop_tsc is not present in guest with host-passthrough and feature policy require invtsc 1425125 - qemu fails to recognize gluster URIs in backing chain for block-commit operation 1430056 - CVE-2016-9603 Qemu: cirrus: heap buffer overflow via vnc connection 1430802 - Enhance qemu to present virtual L3 cache info for vcpus 6. Package List: Managment Agent for RHEL 7 Hosts: Source: qemu-kvm-rhev-2.6.0-28.el7_3.9.src.rpm ppc64le: qemu-img-rhev-2.6.0-28.el7_3.9.ppc64le.rpm qemu-kvm-common-rhev-2.6.0-28.el7_3.9.ppc64le.rpm qemu-kvm-rhev-2.6.0-28.el7_3.9.ppc64le.rpm qemu-kvm-rhev-debuginfo-2.6.0-28.el7_3.9.ppc64le.rpm qemu-kvm-tools-rhev-2.6.0-28.el7_3.9.ppc64le.rpm x86_64: qemu-img-rhev-2.6.0-28.el7_3.9.x86_64.rpm qemu-kvm-common-rhev-2.6.0-28.el7_3.9.x86_64.rpm qemu-kvm-rhev-2.6.0-28.el7_3.9.x86_64.rpm qemu-kvm-rhev-debuginfo-2.6.0-28.el7_3.9.x86_64.rpm qemu-kvm-tools-rhev-2.6.0-28.el7_3.9.x86_64.rpm RHEV-H and VDSM for 7 Hosts: Source: qemu-kvm-rhev-2.6.0-28.el7_3.9.src.rpm ppc64le: qemu-img-rhev-2.6.0-28.el7_3.9.ppc64le.rpm qemu-kvm-common-rhev-2.6.0-28.el7_3.9.ppc64le.rpm qemu-kvm-rhev-2.6.0-28.el7_3.9.ppc64le.rpm qemu-kvm-rhev-debuginfo-2.6.0-28.el7_3.9.ppc64le.rpm qemu-kvm-tools-rhev-2.6.0-28.el7_3.9.ppc64le.rpm x86_64: qemu-img-rhev-2.6.0-28.el7_3.9.x86_64.rpm qemu-kvm-common-rhev-2.6.0-28.el7_3.9.x86_64.rpm qemu-kvm-rhev-2.6.0-28.el7_3.9.x86_64.rpm qemu-kvm-rhev-debuginfo-2.6.0-28.el7_3.9.x86_64.rpm qemu-kvm-tools-rhev-2.6.0-28.el7_3.9.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/updates/classification/#important 8. Contact: The Red Hat security contact is . More contact details at https://access.redhat.com/security/team/contact/ Copyright 2017 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iD8DBQFY9bzGXlSAg2UNWIIRArgXAKDBEkpyjPVpOjzt4gw9RdG+qQHp4QCgpnDo 7W+DAA+xwN7J3jHBIhaOiBo= =MFa8 -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce