RedHat: RHSA-2019-2553:01 Important: qemu-kvm-rhev security, bug fix,

    Date22 Aug 2019
    CategoryRed Hat
    4848
    Posted ByLinuxSecurity Advisories
    An update for qemu-kvm-rhev is now available for Red Hat Virtualization 4 for Red Hat Enterprise Linux 7 and Red Hat Virtualization Engine 4.3. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score,
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    =====================================================================
                       Red Hat Security Advisory
    
    Synopsis:          Important: qemu-kvm-rhev security, bug fix, and enhancement update
    Advisory ID:       RHSA-2019:2553-01
    Product:           Red Hat Virtualization
    Advisory URL:      https://access.redhat.com/errata/RHSA-2019:2553
    Issue date:        2019-08-22
    CVE Names:         CVE-2018-12126 CVE-2018-12127 CVE-2018-12130 
                       CVE-2018-17958 CVE-2018-17963 CVE-2018-20815 
                       CVE-2019-6501 CVE-2019-9824 CVE-2019-11091 
    =====================================================================
    
    1. Summary:
    
    An update for qemu-kvm-rhev is now available for Red Hat Virtualization 4
    for Red Hat Enterprise Linux 7 and Red Hat Virtualization Engine 4.3.
    
    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:
    
    RHV-M 4.3 - x86_64
    Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts - ppc64le, 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 flaw was found in the implementation of the "fill buffer", a mechanism
    used by modern CPUs when a cache-miss is made on L1 CPU cache. If an
    attacker can generate a load operation that would create a page fault, the
    execution will continue speculatively with incorrect data from the fill
    buffer while the data is fetched from higher level caches. This response
    time can be measured to infer data in the fill buffer. (CVE-2018-12130)
    
    * Modern Intel microprocessors implement hardware-level micro-optimizations
    to improve the performance of writing data back to CPU caches. The write
    operation is split into STA (STore Address) and STD (STore Data)
    sub-operations. These sub-operations allow the processor to hand-off
    address generation logic into these sub-operations for optimized writes.
    Both of these sub-operations write to a shared distributed processor
    structure called the 'processor store buffer'. As a result, an unprivileged
    attacker could use this flaw to read private data resident within the CPU's
    processor store buffer. (CVE-2018-12126)
    
    * Microprocessors use a ‘load port’ subcomponent to perform load operations
    from memory or IO. During a load operation, the load port receives data
    from the memory or IO subsystem and then provides the data to the CPU
    registers and operations in the CPU’s pipelines. Stale load operations
    results are stored in the 'load port' table until overwritten by newer
    operations. Certain load-port operations triggered by an attacker can be
    used to reveal data about previous stale requests leaking data back to the
    attacker via a timing side-channel. (CVE-2018-12127)
    
    * Uncacheable memory on some microprocessors utilizing speculative
    execution may allow an authenticated user to potentially enable information
    disclosure via a side channel with local access. (CVE-2019-11091)
    
    * QEMU: device_tree: heap buffer overflow while loading device tree blob
    (CVE-2018-20815)
    
    * QEMU: rtl8139: integer overflow leads to buffer overflow (CVE-2018-17958)
    
    * QEMU: net: ignore packets with large size (CVE-2018-17963)
    
    * QEMU: scsi-generic: possible OOB access while handling inquiry request
    (CVE-2019-6501)
    
    * QEMU: slirp: information leakage in tcp_emu() due to uninitialized stack
    variables (CVE-2019-9824)
    
    For more details about the security issue(s), including the impact, a CVSS
    score, acknowledgments, and other related information, refer to the CVE
    page(s) listed in the References section.
    
    Additional Changes:
    
    This update also fixes several bugs and adds various enhancements.
    Documentation for these changes is available from the Release Notes
    document linked to in the References section.
    
    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/2974891
    
    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/):
    
    1508708 - [data plane] Qemu-kvm core dumped when doing block-stream and block-job-cancel to a data disk with data-plane enabled
    1526313 - Improve QEMU lock error info for hot-plugging same qcow2 image file twice in different target to VM
    1531888 - Local VM and migrated VM on the same host can run with same RAW file as visual disk source while without shareable configured or lock manager enabled
    1551486 - QEMU image locking needn't double open fd number (i.e. drop file-posix.c:s->lock_fd)
    1585155 - QEMU core dumped when hotplug memory exceeding host hugepages and with discard-data=yes
    1597482 - qemu crashed when disk enable the IOMMU
    1598119 - "share-rw=on" does not work for luks format image
    1603104 - Qemu Aborted (core dumped) for 'qemu-kvm: Failed to lock byte 100' when remote NFS or GlusterFS volume stopped during the block mirror(or block commit/stream) process
    1607768 - qemu aborted when start guest with a big iothreads
    1608226 - [virtual-network][mq] prompt warning "qemu-kvm: unable to start vhost net: 14: falling back on userspace virtio" when boot with win8+ guests with multi-queue
    1610461 - High Host CPU load for Windows 10 Guests (Update 1803)  when idle
    1614302 - qemu-kvm: Could not find keytab file: /etc/qemu/krb5.tab: No such file or directory
    1614610 - Guest quit with error when hotunplug cpu
    1619778 - Ballooning is incompatible with vfio assigned devices, but not prevented
    1620373 - Failed to do migration after hotplug and hotunplug the ivshmem device
    1623986 - block-commit can't be used with -blockdev
    1624009 - allow backing of pflash via -blockdev
    1627272 - boot guest with q35+vIOMMU+ device assignment, qemu crash when return assigned network devices from vfio driver to ixgbe in guest
    1628098 - [Intel 7.7 BUG][KVM][Crystal Ridge]object_get_canonical_path_component: assertion failed: (obj->parent != NULL)
    1629056 - qemu NBD server failure with block status of dirty bitmaps
    1629717 - qemu_ram_mmap: Assertion `is_power_of_2(align)' failed
    1629720 - [Intel 7.6 BUG][Crystal Ridge] pc_dimm_get_free_addr: assertion failed: (QEMU_ALIGN_UP(address_space_start, align) == address_space_start)
    1631052 - x-block-dirty-bitmap-merge into a disabled bitmap dest causes assert
    1631227 - Qemu Core dump when quit vm that's in status "paused(io-error)" with data plane enabled
    1631615 - Wrong werror default for -device drive=
    1631877 - qemu dirty bitmap merge fails to update count
    1633150 - Cross migration from RHEL7.5 to RHEL7.6 fails with cpu flag stibp
    1633536 - Qemu core dump when do migration after hot plugging a backend image with 'blockdev-add'(without the frontend)
    1636712 - CVE-2018-17958 QEMU: rtl8139: integer overflow leads to buffer overflow
    1636777 - CVE-2018-17963 QEMU: net: ignore packets with large size
    1642551 - qemu-kvm-tools-rhev depends on libxkbcommon, but the RPM-level dependency is missing
    1646781 - CVE-2018-12126 hardware: Microarchitectural Store Buffer Data Sampling (MSBDS)
    1646784 - CVE-2018-12130 hardware: Microarchitectural Fill Buffer Data Sampling (MFBDS)
    1648236 - QEMU doesn't expose rendernode option for egl-headless display type
    1656913 - qcow2 cache is too small
    1666336 - severe performance impact using encrypted Cinder volume (QEMU luks)
    1666884 - persistent bitmaps prevent qcow2 image resize
    1667320 - -blockdev: auto-read-only is ineffective for drivers on read-only whitelist
    1667782 - CVE-2018-12127 hardware: Micro-architectural Load Port Data Sampling - Information Leak (MLPDS)
    1668160 - CVE-2019-6501 QEMU: scsi-generic: possible OOB access while handling inquiry request
    1668956 - incremental backup bitmap API needs a finalized interface
    1672010 - [RHEL7]Qemu coredump when remove a persistent bitmap after vm re-start(dataplane enabled)
    1673080 - "An unknown error has occurred" when using cdrom to install the system with two blockdev disks.(when choose installation destination)
    1673397 - [RHEL.7] qemu-kvm core dumped after hotplug the deleted disk with iothread parameter
    1673402 - Qemu core dump when start guest with two disks using same drive
    1676728 - RHEL77:  Run iotests as part of build process
    1677073 - Backport additional QEMU 4.0 Bitmap API changes to RHEL 7.7
    1678515 - CVE-2019-9824 QEMU: slirp: information leakage in tcp_emu() due to uninitialized stack variables
    1685989 - Add facility to use block jobs with backing images without write permission
    1691009 - NBD pull mode incremental backup API needs a finalized interface
    1691018 - Fix iotest 226 for local development builds
    1691048 - Add qemu-img info support for querying bitmaps offline
    1691563 - QEMU NBD Feature parity roundup (QEMU 3.1.0)
    1692018 - qemu-img: Protocol error: simple reply when structured reply chunk was expected
    1693101 - CVE-2018-20815 QEMU: device_tree: heap buffer overflow while loading device tree blob
    1703916 - Qemu core dump when quit vm after forbidden to do backup with a read-only bitmap
    1705312 - CVE-2019-11091 hardware: Microarchitectural Data Sampling Uncacheable Memory (MDSUM)
    1714160 - Guest with 'reservations' for a disk start failed
    
    6. Package List:
    
    Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts:
    
    Source:
    qemu-kvm-rhev-2.12.0-33.el7.src.rpm
    
    ppc64le:
    qemu-img-rhev-2.12.0-33.el7.ppc64le.rpm
    qemu-kvm-common-rhev-2.12.0-33.el7.ppc64le.rpm
    qemu-kvm-rhev-2.12.0-33.el7.ppc64le.rpm
    qemu-kvm-rhev-debuginfo-2.12.0-33.el7.ppc64le.rpm
    qemu-kvm-tools-rhev-2.12.0-33.el7.ppc64le.rpm
    
    x86_64:
    qemu-img-rhev-2.12.0-33.el7.x86_64.rpm
    qemu-kvm-common-rhev-2.12.0-33.el7.x86_64.rpm
    qemu-kvm-rhev-2.12.0-33.el7.x86_64.rpm
    qemu-kvm-rhev-debuginfo-2.12.0-33.el7.x86_64.rpm
    qemu-kvm-tools-rhev-2.12.0-33.el7.x86_64.rpm
    
    RHV-M 4.3:
    
    Source:
    qemu-kvm-rhev-2.12.0-33.el7.src.rpm
    
    x86_64:
    qemu-img-rhev-2.12.0-33.el7.x86_64.rpm
    qemu-kvm-common-rhev-2.12.0-33.el7.x86_64.rpm
    qemu-kvm-rhev-2.12.0-33.el7.x86_64.rpm
    qemu-kvm-rhev-debuginfo-2.12.0-33.el7.x86_64.rpm
    qemu-kvm-tools-rhev-2.12.0-33.el7.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-2018-12126
    https://access.redhat.com/security/cve/CVE-2018-12127
    https://access.redhat.com/security/cve/CVE-2018-12130
    https://access.redhat.com/security/cve/CVE-2018-17958
    https://access.redhat.com/security/cve/CVE-2018-17963
    https://access.redhat.com/security/cve/CVE-2018-20815
    https://access.redhat.com/security/cve/CVE-2019-6501
    https://access.redhat.com/security/cve/CVE-2019-9824
    https://access.redhat.com/security/cve/CVE-2019-11091
    https://access.redhat.com/security/vulnerabilities/mds
    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 2019 Red Hat, Inc.
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