[RHSA-2015:0349-01] Important: qemu-kvm security, bug fix, and enhancement update

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Red Hat Security Advisory

 

Synopsis: Important: qemu-kvm security, bug fix, and enhancement update

Advisory ID: RHSA-2015:0349-01

Product: Red Hat Enterprise Linux

Advisory URL: https://rhn.redhat.com/errata/RHSA-2015-0349.html

Issue date: 2015-03-05

CVE Names: CVE-2014-3640 CVE-2014-7815 CVE-2014-7840

CVE-2014-8106

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1. Summary:

 

Updated qemu-kvm packages that fix multiple security issues, several bugs,

and add various enhancements are now available for Red Hat Enterprise

Linux 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:

 

Red Hat Enterprise Linux Client (v. 7) - x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64

Red Hat Enterprise Linux Server (v. 7) - ppc64, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - 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 packages provide the

user-space component for running virtual machines using KVM.

 

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.

(CVE-2014-3640)

 

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.

 

Bug fixes:

 

* The KVM utility executed demanding routing update system calls every time

it performed an MSI vector mask/unmask operation. Consequently, guests

running legacy systems such as Red Hat Enterprise Linux 5 could, under

certain circumstances, experience significant slowdown. Now, the routing

system calls during mask/unmask operations are skipped, and the performance

of legacy guests is now more consistent. (BZ#1098976)

 

* Due to a bug in the Internet Small Computer System Interface (iSCSI)

driver, a qemu-kvm process terminated unexpectedly with a segmentation

fault when the "write same" command was executed in guest mode under the

iSCSI protocol. This update fixes the bug, and the "write same" command now

functions in guest mode under iSCSI as intended. (BZ#1083413)

 

* The QEMU command interface did not properly handle resizing of cache

memory during guest migration, causing QEMU to terminate unexpectedly with

a segmentation fault. This update fixes the related code, and QEMU no

longer crashes in the described situation. (BZ#1066338)

 

Enhancements:

 

* The maximum number of supported virtual CPUs (vCPUs) in a KVM guest has

been increased to 240. This increases the number of virtual processing

units that the user can assign to the guest, and therefore improves its

performance potential. (BZ#1134408)

 

* Support for the 5th Generation Intel Core processors has been added to

the QEMU hypervisor, the KVM kernel code, and the libvirt API. This allows

KVM guests to use the following instructions and features: ADCX, ADOX,

RDSFEED, PREFETCHW, and supervisor mode access prevention (SMAP).

(BZ#1116117)

 

* The "dump-guest-memory" command now supports crash dump compression. This

makes it possible for users who cannot use the "virsh dump" command to

require less hard disk space for guest crash dumps. In addition, saving a

compressed guest crash dump frequently takes less time than saving a

non-compressed one. (BZ#1157798)

 

* This update introduces support for flight recorder tracing, which uses

SystemTap to automatically capture qemu-kvm data while the guest machine is

running. For detailed instructions on how to configure and use flight

recorder tracing, see the Virtualization Deployment and Administration

Guide, linked to in the References section below. (BZ#1088112)

 

4. Solution:

 

All qemu-kvm users are advised to upgrade to these updated packages, which

contain backported patches to correct these issues and add these

enhancements. 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.

 

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:

 

https://access.redhat.com/articles/11258

 

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

 

895436 - qemu-kvm core dump when guest do S3/S4 with max(232) virtio block devices (multifunction=on)

949385 - passthrough USB speaker to win2012 guest fail to work well

980747 - flood with 'xhci: wrote doorbell while xHC stopped or paused' when redirected USB Webcam from usb-host with xHCI controller

980833 - xhci: FIXME: endpoint stopped w/ xfers running, data might be lost

990724 - qemu-kvm failing when invalid machine type is provided

996011 - vlan and queues options cause core dumped when qemu-kvm process quit(or ctrl+c)

999789 - qemu should give a more friendly prompt when didn't specify read-only for VMDK format disk

1002493 - qemu-img convert rate about 100k/second from qcow2/raw to vmdk format on nfs system file

1017685 - Gluster etc. should not be a dependency of vscclient and libcacard

1021788 - the error message "scsi generic interface too old" is wrong more often than not

1026314 - BUG: qemu-kvm hang when use '-sandbox on'+'vnc'+'hda'

1027565 - fail to reboot guest after migration from RHEL6.5 host to RHEL7.0 host

1029271 - Format specific information (create type) was wrong when create it specified subformat='streamOptimized'

1038914 - Guest can't receive any character transmitted from host after hot unplugging virtserialport then hot plugging again

1039791 - qemu-img creates truncated VMDK image with subformat=twoGbMaxExtentFlat

1046574 - fail to passthrough the USB speaker redirected from usb-redir with xhci controller

1046873 - fail to be recognized the hotpluging usb-storage device with xhci controller in win2012R2 guest

1049734 - PCI: QEMU crash on illegal operation: attaching a function to a non multi-function device

1052093 - qcow2 corruptions (leaked clusters after installing a rhel7 guest using virtio_scsi)

1054077 - qemu crash when reboot win7 guest with spice display

1064156 - [qxl] The guest show black screen while resumed guest which managedsaved in pmsuspended status.

1064647 - qemu-kvm core dump when hot-plug virtio-blk-pci device with gluster backend

1066338 - Reduce the migrate cache size during migration causes qemu segment fault

1074219 - qemu core dump when install a RHEL.7 guest(xhci) with migration

1074403 - qemu-kvm can not give any warning hint when set sndbuf with negative value

1074913 - migration can not finish with 1024k 'remaining ram' left after hotunplug 4 nics

1075846 - qemu-kvm core dumped when hotplug/unhotplug USB3.0 device multi times

1076326 - qemu-kvm does not quit when booting guest w/ 161 vcpus and "-no-kvm"

1079147 - [WHQL][balloon][virtio-rng]ob named DPWLK-HotADD-Device Test- Verify dirver support for Hot-Add CPU made win2k8-R2 BSOD (0x7E)

1083413 - qemu-kvm: iSCSI: Failure. SENSE KEY:ILLEGAL_REQUEST(5) ASCQ:INVALID_FIELD_IN_CDB(0x2400)

1085701 - Guest hits call trace migrate from RHEL6.5 to RHEL7.0 host with -M 6.1 & balloon & uhci device

1086598 - migrate_cancel wont take effect on previouly wrong migrate -d cmd

1086987 - src qemu crashed when starting migration in inmigrate mode

1088116 - qemu crash when device_del usb-redir

1088150 - qemu-img coredumpd when try to create a gluster format image

1088176 - QEMU fail to check whether duplicate ID for block device drive using 'blockdev-add' to hotplug

1088695 - there are four "gluster" in qemu-img supported format list

1088822 - hot-plug a virtio-scsi disk via 'blockdev-add' always cause QEMU quit

1089606 - QEMU will not reject invalid number of queues (num_queues = 0) specified for virtio-scsi

1093983 - there are three "nbd" in qemu-img supported format list

1094285 - Hot plug CPU not working with RHEL6 machine types running on RHEL7 host.

1095645 - vectors of virtio-scsi-pci will be 0 when set vectors>=129

1096576 - QEMU core dumped when boot up two scsi-hd disk on the same virtio-scsi-pci controller in Intel host

1097020 - [RFE] qemu-img: Add/improve Disk2VHD tools creating VHDX images

1097363 - qemu ' KVM internal error. Suberror: 1' when query cpu frequently during pxe boot in Intel "Q95xx" host

1098086 - RFE: Supporting creating vmdk/vdi/vpc format disk with protocols (glusterfs)

1104748 - 48% reduction in IO performance for KVM guest, io=native

1107821 - rdma migration: seg if destination isn't listening

1111450 - Guest crash when hotplug usb while disable virt_use_usb

1113009 - Migration failed with virtio-blk from RHEL6.5.0 host to RHEL7.0 host

1116728 - Backport qemu_bh_schedule() race condition fix

1116941 - Return value of virtio_load not checked in virtio_rng_load

1118707 - VMstate static checker: backport -dump-vmstate feature to export json-encoded vmstate info

1122151 - Pass close from qemu-ga

1123372 - qemu-kvm crashed when doing iofuzz testing

1130428 - After migration of RHEL7.1 guest with "-vga qxl", GUI console is hang

1131316 - fail to specify wwn for virtual IDE CD-ROM

1134237 - Opening malformed VMDK description file should fail

1134241 - QEMU fails to correctly read/write on VMDK with big flat extent

1134251 - Opening an obviously truncated VMDK image should fail

1134283 - qemu-img convert from ISO to streamOptimized fails

1138639 - fail to login spice session with password + expire time

1138691 - Allow qemu-img to bypass the host cache (check, compare, convert, rebase, amend)

1140618 - Should replace "qemu-system-i386" by "/usr/libexec/qemu-kvm" in manpage of qemu-kvm for our official qemu-kvm build

1140742 - Enable native qemu support for Ceph

1141667 - Qemu crashed if reboot guest after hot remove AC97 sound device

1142290 - guest is stuck when setting balloon memory with large guest-stats-polling-interval

1144818 - CVE-2014-3640 qemu: slirp: NULL pointer deref in sosendto()

1155518 - qemu-kvm: undefined symbol: glfs_discard_async

1157641 - CVE-2014-7815 qemu: vnc: insufficient bits_per_pixel from the client sanitization

1160237 - qemu-img convert intermittently corrupts output images

1161563 - invalid QEMU NOTEs in vmcore that is dumped for multi-VCPU guests

1163075 - CVE-2014-7840 qemu: insufficient parameter validation during ram load

1169454 - CVE-2014-8106 qemu: cirrus: insufficient blit region checks

1175325 - Delete cow block driver

1180942 - qemu core dumped when unhotplug gpu card assigned to guest

 

6. Package List:

 

Red Hat Enterprise Linux Client (v. 7):

 

Source:

qemu-kvm-1.5.3-86.el7.src.rpm

 

x86_64:

libcacard-1.5.3-86.el7.i686.rpm

libcacard-1.5.3-86.el7.x86_64.rpm

qemu-img-1.5.3-86.el7.x86_64.rpm

qemu-kvm-1.5.3-86.el7.x86_64.rpm

qemu-kvm-common-1.5.3-86.el7.x86_64.rpm

qemu-kvm-debuginfo-1.5.3-86.el7.i686.rpm

qemu-kvm-debuginfo-1.5.3-86.el7.x86_64.rpm

qemu-kvm-tools-1.5.3-86.el7.x86_64.rpm

 

Red Hat Enterprise Linux Client Optional (v. 7):

 

x86_64:

libcacard-devel-1.5.3-86.el7.i686.rpm

libcacard-devel-1.5.3-86.el7.x86_64.rpm

libcacard-tools-1.5.3-86.el7.x86_64.rpm

qemu-kvm-debuginfo-1.5.3-86.el7.i686.rpm

qemu-kvm-debuginfo-1.5.3-86.el7.x86_64.rpm

 

Red Hat Enterprise Linux ComputeNode Optional (v. 7):

 

Source:

qemu-kvm-1.5.3-86.el7.src.rpm

 

x86_64:

libcacard-1.5.3-86.el7.i686.rpm

libcacard-1.5.3-86.el7.x86_64.rpm

libcacard-devel-1.5.3-86.el7.i686.rpm

libcacard-devel-1.5.3-86.el7.x86_64.rpm

libcacard-tools-1.5.3-86.el7.x86_64.rpm

qemu-img-1.5.3-86.el7.x86_64.rpm

qemu-kvm-1.5.3-86.el7.x86_64.rpm

qemu-kvm-common-1.5.3-86.el7.x86_64.rpm

qemu-kvm-debuginfo-1.5.3-86.el7.i686.rpm

qemu-kvm-debuginfo-1.5.3-86.el7.x86_64.rpm

qemu-kvm-tools-1.5.3-86.el7.x86_64.rpm

 

Red Hat Enterprise Linux Server (v. 7):

 

Source:

qemu-kvm-1.5.3-86.el7.src.rpm

 

ppc64:

qemu-img-1.5.3-86.el7.ppc64.rpm

qemu-kvm-debuginfo-1.5.3-86.el7.ppc64.rpm

 

x86_64:

libcacard-1.5.3-86.el7.i686.rpm

libcacard-1.5.3-86.el7.x86_64.rpm

qemu-img-1.5.3-86.el7.x86_64.rpm

qemu-kvm-1.5.3-86.el7.x86_64.rpm

qemu-kvm-common-1.5.3-86.el7.x86_64.rpm

qemu-kvm-debuginfo-1.5.3-86.el7.i686.rpm

qemu-kvm-debuginfo-1.5.3-86.el7.x86_64.rpm

qemu-kvm-tools-1.5.3-86.el7.x86_64.rpm

 

Red Hat Enterprise Linux Server Optional (v. 7):

 

ppc64:

libcacard-1.5.3-86.el7.ppc.rpm

libcacard-1.5.3-86.el7.ppc64.rpm

libcacard-devel-1.5.3-86.el7.ppc.rpm

libcacard-devel-1.5.3-86.el7.ppc64.rpm

libcacard-tools-1.5.3-86.el7.ppc64.rpm

qemu-kvm-debuginfo-1.5.3-86.el7.ppc.rpm

qemu-kvm-debuginfo-1.5.3-86.el7.ppc64.rpm

 

x86_64:

libcacard-devel-1.5.3-86.el7.i686.rpm

libcacard-devel-1.5.3-86.el7.x86_64.rpm

libcacard-tools-1.5.3-86.el7.x86_64.rpm

qemu-kvm-debuginfo-1.5.3-86.el7.i686.rpm

qemu-kvm-debuginfo-1.5.3-86.el7.x86_64.rpm

 

Red Hat Enterprise Linux Workstation (v. 7):

 

Source:

qemu-kvm-1.5.3-86.el7.src.rpm

 

x86_64:

libcacard-1.5.3-86.el7.i686.rpm

libcacard-1.5.3-86.el7.x86_64.rpm

qemu-img-1.5.3-86.el7.x86_64.rpm

qemu-kvm-1.5.3-86.el7.x86_64.rpm

qemu-kvm-common-1.5.3-86.el7.x86_64.rpm

qemu-kvm-debuginfo-1.5.3-86.el7.i686.rpm

qemu-kvm-debuginfo-1.5.3-86.el7.x86_64.rpm

qemu-kvm-tools-1.5.3-86.el7.x86_64.rpm

 

Red Hat Enterprise Linux Workstation Optional (v. 7):

 

x86_64:

libcacard-devel-1.5.3-86.el7.i686.rpm

libcacard-devel-1.5.3-86.el7.x86_64.rpm

libcacard-tools-1.5.3-86.el7.x86_64.rpm

qemu-kvm-debuginfo-1.5.3-86.el7.i686.rpm

qemu-kvm-debuginfo-1.5.3-86.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-2014-3640

https://access.redhat.com/security/cve/CVE-2014-7815

https://access.redhat.com/security/cve/CVE-2014-7840

https://access.redhat.com/security/cve/CVE-2014-8106

https://access.redhat.com/security/updates/classification/#important

https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Virtualization_Deployment_and_Administration_Guide/index.html

 

8. Contact:

 

The Red Hat security contact is . More contact

details at https://access.redhat.com/security/team/contact/

 

Copyright 2015 Red Hat, Inc.

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