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[RHSA-2015:0624-01] Important: qemu-kvm-rhev security, bug fix, and enhancement update

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                   Red Hat Security Advisory

Synopsis:          Important: qemu-kvm-rhev security, bug fix, and enhancement update
Advisory ID:       RHSA-2015:0624-01
Product:           Red Hat Enterprise Virtualization
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2015-0624.html
Issue date:        2015-03-05
CVE Names:         CVE-2014-3640 CVE-2014-7815 CVE-2014-7840 

1. Summary:

Updated qemu-kvm-rhev packages that fix multiple security issues, several
bugs, and add various enhancements are now available for Red Hat Enterprise
Virtualization Hypervisor 7.

Red Hat Product Security has rated this update as having Important security
impact. Common Vulnerability Scoring System (CVSS) base scores, which give
detailed severity ratings, are available for each vulnerability from the
CVE links in the References section.

2. Relevant releases/architectures:

RHEV-H and VDSM for 7 Hosts - 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 package provides the
user-space component for running virtual machines using KVM, in
environments managed by Red Hat Enterprise Virtualization Manager.

It was found that the Cirrus blit region checks were insufficient.
A privileged guest user could use this flaw to write outside of
VRAM-allocated buffer boundaries in the host's QEMU process address space
with attacker-provided data. (CVE-2014-8106)

An uninitialized data structure use flaw was found in the way the
set_pixel_format() function sanitized the value of bits_per_pixel.
An attacker able to access a guest's VNC console could use this flaw to
crash the guest. (CVE-2014-7815)

It was found that certain values that were read when loading RAM during
migration were not validated. A user able to alter the savevm data (either
on the disk or over the wire during migration) could use either of these
flaws to corrupt QEMU process memory on the (destination) host, which could
potentially result in arbitrary code execution on the host with the
privileges of the QEMU process. (CVE-2014-7840)

A NULL pointer dereference flaw was found in the way QEMU handled UDP
packets with a source port and address of 0 when QEMU's user networking was
in use. A local guest user could use this flaw to crash the guest.

Red Hat would like to thank James Spadaro of Cisco for reporting
CVE-2014-7815, and Xavier Mehrenberger and Stephane Duverger of Airbus for
reporting CVE-2014-3640. The CVE-2014-8106 issue was found by Paolo Bonzini
of Red Hat, and the CVE-2014-7840 issue was discovered by Michael S.
Tsirkin of Red Hat.

This update provides the enhanced version of the qemu-kvm-rhev packages for
Red Hat Enterprise Virtualization (RHEV) Hypervisor, which also fixes
several bugs and adds various enhancements.

All Red Hat Enterprise Virtualization users with deployed virtualization
hosts are advised to install these updated packages, which add this
enhancement. 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.

4. Solution:

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:


5. Bugs fixed (https://bugzilla.redhat.com/):

733600 - qemu-kvm doesn't report error when supplied negative vnc port value
760898 - kvm should disable to change vnc password after removing vnc password option
801284 - usb-host accepting out-of-range values for various parameters ending an invalid usb device occupy an ehci port
852348 - fail to block_resize local data disk with IDE/AHCI disk_interface
893654 - allow non-contiguous CPU ranges on -numa command-line options
923599 - Virtio serial chardev will be still in use even failed to hot plug a serial port on it
946993 - Q35 does not honor -drive if=ide,... and its sugared forms -cdrom, -hda, ...
1003432 - qemu-kvm should not allow different virtio serial port use the same name
1013157 - backport block-layer dataplane implementation
1024599 - Windows7 x86 guest with ahci backend hit BSOD when do "hibernate"
1029987 - spice-server reports incorrect listening address on monitor with "ipv6" option
1032855 - qemu-kvm core dump when do S4 inside guest after drive-mirror got BLOCK_JOB_READY status(from libiscsi storage to libiscsi storage))
1039745 - qemu vcpu hotplug support for q35 machine type
1047748 - fail to specify the bootindex for the usb-storage with usb-xhci controller
1052041 - Rubbish serial port device is generated once failed to hotplug a serial port
1055532 - QEMU should abort when invalid CPU flag name is used
1057425 - multiple qxl devices(>9) cause qemu-kvm core dump
1061827 - Maintain relative path to backing file image during live merge (block-commit)
1064742 - QMP: "query-version" doesn't include the -rhev prefix from the qemu-kvm-rhev package
1066239 - Hotplug second virtioserialport failed after attached and detached virtconsole port
1071058 - qemu-img unable to create image filename containing a ':'
1071199 - qemu-kvm numa emulation won't check duplicate node id
1076990 - Enable complex memory requirements for virtual machines
1083844 - Original image checking get errors after commit back with lazy_refcounts=on+qcow2_v3
1086502 - QEMU core dumped when blockdev_add with 'aio': 'native' but without 'cache' specified
1093023 - provide RHEL-specific machine types in QEMU
1096196 - QEMU should abort if NUMA node configuration don't cover all RAM
1102411 - qemu guest-set-time: RTC timer interrupt reinjection vs guest-set-time
1110429 - need a non-event way to determine qemu's current offset from utc
1114889 - drive-mirror cause qemu-kvm process segfaults
1116729 - Backport qemu_bh_schedule() race condition fix
1117445 - QMP: extend block events with error information
1120718 - Migration: Something broken with video
1121025 - Migration: acpi/tables size mismatch
1122619 - unnecessary files being distributed
1123908 - block.c: multiwrite_merge() truncates overlapping requests
1126777 - guest which set numa in xml can't start success
1128095 - chardev 'chr0' isn't initialized when we try to open rng backend
1128608 - [AHCI] RHEL 5.10 x86_64 guest kernel panic - VFS: Unable to mount root fs on unknown-block(9,1)
1129259 - Add traces to virtio-rng device
1129593 - Guest can't poweroff after finishing installation
1132385 - qemu-img convert rate about 100k/second from qcow2/raw to vmdk format on nfs system file
1132569 - RFE: Enable curl driver in qemu-kvm-rhev: https only
1133736 - qemu should provide iothread and x-data-plane properties for /usr/libexec/qemu-kvm -device virtio-blk-pci,?
1134980 - Should export first vga display with Spice
1135844 - [virtio-win]communication ports were marked with a  yellow exclamation after hotplug pci-serial,pci-serial-2x,pci-serial-4x
1135893 - qemu-kvm should report an error message when host's freehugepage memory < domain's memory
1136381 - RFE: Supporting creating vdi/vpc format disk with protocols (glusterfs) for qemu-kvm-rhev-2.1.x
1136752 - virtio-blk dataplane support for block_resize and hot unplug
1138359 - RFE: Enable ssh driver in qemu-kvm-rhev
1138579 - Migration failed with nec-usb-xhci from RHEL7. 0 to RHEL7.1
1140001 - data-plane hotplug should be refused to start if device is already in use (drive-mirror job)
1140145 - qemu-kvm crashed when doing iofuzz testing
1140620 - Should replace "qemu-system-i386" by "/usr/libexec/qemu-kvm" in manpage of qemu-kvm for our official qemu-kvm build
1140744 - Enable native support for Ceph
1140975 - fail to login spice session with password + expire time
1140997 - guest is stuck when setting balloon memory with large guest-stats-polling-interval
1141656 - Virtio-scsi: performance degradation from 1.5.3 to 2.1.0
1141666 - Qemu crashed if reboot guest after hot remove AC97 sound device
1142331 - qemu-img convert intermittently corrupts output images
1144325 - Can not probe  "qemu.kvm.virtio_blk_data_plane_complete_request"
1144818 - CVE-2014-3640 qemu: slirp: NULL pointer deref in sosendto()
1145042 - The output of "/usr/libexec/qemu-kvm -M ?" should be ordered.
1146573 - qemu core dump when boot guest with smp(num)<cores(num)
1146801 - sendkey: releasing order of combined keys was wrongly converse
1146826 - QEMU will not reject invalid number of queues (num_queues = 0) specified for virtio-scsi
1147354 - Qemu core dump when boot up a guest on a non-existent hugepage path
1150820 - fail to specify wwn for virtual IDE CD-ROM
1151947 - virtconsole causes qemu-kvm core dump
1152830 - Fix sense buffer in virtio-scsi LUN passthrough
1152901 - block/curl: Fix type safety of s->timeout
1152922 - smbios uuid mismatched
1153590 - Improve error message on huge page preallocation
1157329 - qemu-kvm: undefined symbol: glfs_discard_async
1157641 - CVE-2014-7815 qemu: vnc: insufficient bits_per_pixel from the client sanitization
1160102 - opening read-only iscsi lun as read-write should fail
1160504 - guest can not show usb device after adding some usb controllers and redirdevs.
1161397 - qemu core dump when install a RHEL.7 guest(xhci) with migration
1163075 - CVE-2014-7840 qemu: insufficient parameter validation during ram load
1163735 - -device pc-dimm fails to initialize on non-NUMA configs
1164759 - Handle multipage ranges in invalidate_and_set_dirty()
1166481 - Allow qemu-img to bypass the host cache (check, compare, convert, rebase, amend)
1169280 - Segfault while query device properties (ics, icp)
1169454 - CVE-2014-8106 qemu: cirrus: insufficient blit region checks
1169589 - test case 051 071 and 087 of qemu-iotests fail for qcow2 with qemu-kvm-rhev-2.1.2-14.el7
1170093 - guest NUMA failed to migrate when machine is rhel6.5.0
1170533 - Should disalbe S3/S4 in default  under Q35 machine type in rhel7
1170871 - qemu core dumped when unhotplug gpu card assigned to guest
1171552 - Storage vm migration failed when running BurnInTes
1172473 - BUG: seccomp filter failure with "-object memory-backend-ram"
1173167 - Corrupted ACPI tables in some configurations using pc-i440fx-rhel7.0.0
1175841 - Delete cow block driver
1177127 - [SVVP]smbios HCT job failed with  'Processor Max Speed cannot be Unknown' with -M pc-i440fx-rhel7.1.0
1179165 - [SVVP]smbios HCT job failed with  Unspecified error  with -M pc-i440fx-rhel7.1.0
1182494 - BUG: qemu-kvm hang when enabled both sandbox and mlock

6. Package List:

RHEV-H and VDSM for 7 Hosts:



These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from

7. References:


8. Contact:

The Red Hat security contact is <secalert redhat com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2015 Red Hat, Inc.
Version: GnuPG v1


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