============================================================================
Ubuntu Security Notice USN-2409-1
November 13, 2014

qemu, qemu-kvm vulnerabilities
============================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 14.10
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS
- Ubuntu 10.04 LTS

Summary:

Several security issues were fixed in QEMU.

Software Description:
- qemu: Machine emulator and virtualizer
- qemu-kvm: Machine emulator and virtualizer

Details:

Laszlo Ersek discovered that QEMU incorrectly handled memory in the vga
device. A malicious guest could possibly use this issue to read arbitrary
host memory. This issue only affected Ubuntu 14.04 LTS and Ubuntu 14.10.
(CVE-2014-3615)

Xavier Mehrenberger and Stephane Duverger discovered that QEMU incorrectly
handled certain udp packets when using guest networking. A malicious guest
could possibly use this issue to cause a denial of service. (CVE-2014-3640)

It was discovered that QEMU incorrectly handled parameter validation in
the vmware_vga device. A malicious guest could possibly use this issue to
write into memory of the host, leading to privilege escalation.
(CVE-2014-3689)

It was discovered that QEMU incorrectly handled USB xHCI controller live
migration. An attacker could possibly use this issue to cause a denial of
service, or possibly execute arbitrary code. This issue only affected
Ubuntu 14.04 LTS. (CVE-2014-5263)

Michael S. Tsirkin discovered that QEMU incorrectly handled memory in the
ACPI PCI hotplug interface. A malicious guest could possibly use this issue
to access memory of the host, leading to information disclosure or
privilege escalation. This issue only affected Ubuntu 14.04 LTS.
(CVE-2014-5388)

James Spadaro discovered that QEMU incorrectly handled certain VNC
bytes_per_pixel values. An attacker having access to a VNC console could
possibly use this issue to cause a guest to crash, resulting in a denial of
service. (CVE-2014-7815)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 14.10:
  qemu-system                     2.1+dfsg-4ubuntu6.1
  qemu-system-aarch64             2.1+dfsg-4ubuntu6.1
  qemu-system-arm                 2.1+dfsg-4ubuntu6.1
  qemu-system-mips                2.1+dfsg-4ubuntu6.1
  qemu-system-misc                2.1+dfsg-4ubuntu6.1
  qemu-system-ppc                 2.1+dfsg-4ubuntu6.1
  qemu-system-sparc               2.1+dfsg-4ubuntu6.1
  qemu-system-x86                 2.1+dfsg-4ubuntu6.1

Ubuntu 14.04 LTS:
  qemu-system                     2.0.0+dfsg-2ubuntu1.7
  qemu-system-aarch64             2.0.0+dfsg-2ubuntu1.7
  qemu-system-arm                 2.0.0+dfsg-2ubuntu1.7
  qemu-system-mips                2.0.0+dfsg-2ubuntu1.7
  qemu-system-misc                2.0.0+dfsg-2ubuntu1.7
  qemu-system-ppc                 2.0.0+dfsg-2ubuntu1.7
  qemu-system-sparc               2.0.0+dfsg-2ubuntu1.7
  qemu-system-x86                 2.0.0+dfsg-2ubuntu1.7

Ubuntu 12.04 LTS:
  qemu-kvm                        1.0+noroms-0ubuntu14.19

Ubuntu 10.04 LTS:
  qemu-kvm                        0.12.3+noroms-0ubuntu9.25

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
  http://www.ubuntu.com/usn/usn-2409-1
  CVE-2014-3615, CVE-2014-3640, CVE-2014-3689, CVE-2014-5263,
  CVE-2014-5388, CVE-2014-7815

Package Information:
  https://launchpad.net/ubuntu/+source/qemu/2.1+dfsg-4ubuntu6.1
  https://launchpad.net/ubuntu/+source/qemu/2.0.0+dfsg-2ubuntu1.7
  https://launchpad.net/ubuntu/+source/qemu-kvm/1.0+noroms-0ubuntu14.19
  https://launchpad.net/ubuntu/+source/qemu-kvm/0.12.3+noroms-0ubuntu9.25