Višestruke ranjivosti programskog paketa qemu-kvm

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Red Hat Security Advisory

Synopsis: Moderate: qemu-kvm security and bug fix update
Advisory ID: RHSA-2014:0927-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2014-0927.html
Issue date: 2014-07-23
CVE Names: CVE-2013-4148 CVE-2013-4149 CVE-2013-4150
CVE-2013-4151 CVE-2013-4527 CVE-2013-4529
CVE-2013-4535 CVE-2013-4536 CVE-2013-4541
CVE-2013-4542 CVE-2013-6399 CVE-2014-0182
CVE-2014-0222 CVE-2014-0223 CVE-2014-3461
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1. Summary:

Updated qemu-kvm packages that fix multiple security issues and various
bugs are now available for Red Hat Enterprise Linux 7.

The Red Hat Security Response Team has rated this update as having Moderate
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 (v. 7) – x86_64
Red Hat Enterprise Linux ComputeNode Optional (v. 7) – x86_64
Red Hat Enterprise Linux Server (v. 7) – x86_64
Red Hat Enterprise Linux Server Optional (v. 7) – 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 package provides the
user-space component for running virtual machines using KVM.

Two integer overflow flaws were found in the QEMU block driver for QCOW
version 1 disk images. A user able to alter the QEMU disk image files
loaded by a guest could use either of these flaws to corrupt QEMU process
memory on the host, which could potentially result in arbitrary code
execution on the host with the privileges of the QEMU process.
(CVE-2014-0222, CVE-2014-0223)

Multiple buffer overflow, input validation, and out-of-bounds write flaws
were found in the way virtio, virtio-net, virtio-scsi, usb, and hpet
drivers of QEMU handled state loading after migration. 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-2013-4148, CVE-2013-4149, CVE-2013-4150, CVE-2013-4151, CVE-2013-4527,
CVE-2013-4529, CVE-2013-4535, CVE-2013-4536, CVE-2013-4541, CVE-2013-4542,
CVE-2013-6399, CVE-2014-0182, CVE-2014-3461)

These issues were discovered by Michael S. Tsirkin, Anthony Liguori and
Michael Roth of Red Hat: CVE-2013-4148, CVE-2013-4149, CVE-2013-4150,
CVE-2013-4151, CVE-2013-4527, CVE-2013-4529, CVE-2013-4535, CVE-2013-4536,
CVE-2013-4541, CVE-2013-4542, CVE-2013-6399, CVE-2014-0182, and
CVE-2014-3461.

This update also fixes the following bugs:

* Previously, QEMU did not free pre-allocated zero clusters correctly and
the clusters under some circumstances leaked. With this update,
pre-allocated zero clusters are freed appropriately and the cluster leaks
no longer occur. (BZ#1110188)

* Prior to this update, the QEMU command interface did not properly handle
resizing of cache memory during guest migration, causing QEMU to terminate
unexpectedly with a segmentation fault and QEMU to fail. This update fixes
the related code and QEMU no longer crashes in the described situation.
(BZ#1110191)

* Previously, when a guest device was hot unplugged, QEMU correctly removed
the corresponding file descriptor watch but did not re-create it after the
device was re-connected. As a consequence, the guest became unable to
receive any data from the host over this device. With this update, the file
descriptor’s watch is re-created and the guest in the above scenario can
communicate with the host as expected. (BZ#1110219)

* Previously, the QEMU migration code did not account for the gaps caused
by hot unplugged devices and thus expected more memory to be transferred
during migrations. As a consequence, guest migration failed to complete
after multiple devices were hot unplugged. In addition, the migration info
text displayed erroneous values for the “remaining ram” item. With this
update, QEMU calculates memory after a device has been unplugged correctly,
and any subsequent guest migrations proceed as expected. (BZ#1110189)

All qemu-kvm users are advised to upgrade to these updated packages, which
contain backported patches to correct these issues. 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.

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
https://access.redhat.com/articles/11258

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

1066334 – CVE-2013-4148 qemu: virtio-net: buffer overflow on invalid state load
1066337 – CVE-2013-4149 qemu: virtio-net: out-of-bounds buffer write on load
1066340 – CVE-2013-4150 qemu: virtio-net: out-of-bounds buffer write on invalid state load
1066342 – CVE-2013-4151 qemu: virtio: out-of-bounds buffer write on invalid state load
1066347 – CVE-2013-4527 qemu: hpet: buffer overrun on invalid state load
1066353 – CVE-2013-4529 qemu: hw/pci/pcie_aer.c: buffer overrun on invalid state load
1066361 – CVE-2013-6399 qemu: virtio: buffer overrun on incoming migration
1066382 – CVE-2013-4542 qemu: virtio-scsi: buffer overrun on invalid state load
1066384 – CVE-2013-4541 qemu: usb: insufficient sanity checking of setup_index+setup_len in post_load
1066401 – CVE-2013-4535 CVE-2013-4536 qemu: virtio: insufficient validation of num_sg when mapping
1088986 – CVE-2014-0182 qemu: virtio: out-of-bounds buffer write on state load with invalid config_len
1096821 – CVE-2014-3461 Qemu: usb: fix up post load checks
1097216 – CVE-2014-0222 Qemu: qcow1: validate L2 table size to avoid integer overflows
1097222 – CVE-2014-0223 Qemu: qcow1: validate image size to avoid out-of-bounds memory access
1110188 – qcow2 corruptions (leaked clusters after installing a rhel7 guest using virtio_scsi)
1110189 – migration can not finish with 1024k ‘remaining ram’ left after hotunplug 4 nics
1110191 – Reduce the migrate cache size during migration causes qemu segment fault
1110219 – Guest can’t receive any character transmitted from host after hot unplugging virtserialport then hot plugging again

6. Package List:

Red Hat Enterprise Linux Client (v. 7):

Source:
qemu-kvm-1.5.3-60.el7_0.5.src.rpm

x86_64:
libcacard-1.5.3-60.el7_0.5.i686.rpm
libcacard-1.5.3-60.el7_0.5.x86_64.rpm
qemu-guest-agent-1.5.3-60.el7_0.5.x86_64.rpm
qemu-img-1.5.3-60.el7_0.5.x86_64.rpm
qemu-kvm-1.5.3-60.el7_0.5.x86_64.rpm
qemu-kvm-common-1.5.3-60.el7_0.5.x86_64.rpm
qemu-kvm-debuginfo-1.5.3-60.el7_0.5.i686.rpm
qemu-kvm-debuginfo-1.5.3-60.el7_0.5.x86_64.rpm
qemu-kvm-tools-1.5.3-60.el7_0.5.x86_64.rpm

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

x86_64:
libcacard-devel-1.5.3-60.el7_0.5.i686.rpm
libcacard-devel-1.5.3-60.el7_0.5.x86_64.rpm
libcacard-tools-1.5.3-60.el7_0.5.x86_64.rpm
qemu-kvm-debuginfo-1.5.3-60.el7_0.5.i686.rpm
qemu-kvm-debuginfo-1.5.3-60.el7_0.5.x86_64.rpm

Red Hat Enterprise Linux ComputeNode (v. 7):

Source:
qemu-kvm-1.5.3-60.el7_0.5.src.rpm

x86_64:
qemu-guest-agent-1.5.3-60.el7_0.5.x86_64.rpm
qemu-kvm-debuginfo-1.5.3-60.el7_0.5.x86_64.rpm

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

x86_64:
libcacard-1.5.3-60.el7_0.5.i686.rpm
libcacard-1.5.3-60.el7_0.5.x86_64.rpm
libcacard-devel-1.5.3-60.el7_0.5.i686.rpm
libcacard-devel-1.5.3-60.el7_0.5.x86_64.rpm
libcacard-tools-1.5.3-60.el7_0.5.x86_64.rpm
qemu-img-1.5.3-60.el7_0.5.x86_64.rpm
qemu-kvm-1.5.3-60.el7_0.5.x86_64.rpm
qemu-kvm-common-1.5.3-60.el7_0.5.x86_64.rpm
qemu-kvm-debuginfo-1.5.3-60.el7_0.5.i686.rpm
qemu-kvm-debuginfo-1.5.3-60.el7_0.5.x86_64.rpm
qemu-kvm-tools-1.5.3-60.el7_0.5.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
qemu-kvm-1.5.3-60.el7_0.5.src.rpm

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

Red Hat Enterprise Linux Workstation (v. 7):

Source:
qemu-kvm-1.5.3-60.el7_0.5.src.rpm

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

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/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2013-4148.html
https://www.redhat.com/security/data/cve/CVE-2013-4149.html
https://www.redhat.com/security/data/cve/CVE-2013-4150.html
https://www.redhat.com/security/data/cve/CVE-2013-4151.html
https://www.redhat.com/security/data/cve/CVE-2013-4527.html
https://www.redhat.com/security/data/cve/CVE-2013-4529.html
https://www.redhat.com/security/data/cve/CVE-2013-4535.html
https://www.redhat.com/security/data/cve/CVE-2013-4536.html
https://www.redhat.com/security/data/cve/CVE-2013-4541.html
https://www.redhat.com/security/data/cve/CVE-2013-4542.html
https://www.redhat.com/security/data/cve/CVE-2013-6399.html
https://www.redhat.com/security/data/cve/CVE-2014-0182.html
https://www.redhat.com/security/data/cve/CVE-2014-0222.html
https://www.redhat.com/security/data/cve/CVE-2014-0223.html
https://www.redhat.com/security/data/cve/CVE-2014-3461.html
https://access.redhat.com/security/updates/classification/#moderate

8. Contact:

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

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