9 - USN-3268-1

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

- Ubuntu 17.04

Summary:

Several security issues were fixed in QEMU.

Software Description: - qemu: Machine emulator and virtualizer

Details:

Zhenhao Hong discovered that QEMU incorrectly handled the Virtio GPU device. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2016-10028)

It was discovered that QEMU incorrectly handled the JAZZ RC4030 device. A privileged attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2016-8667)

Jann Horn discovered that QEMU incorrectly handled VirtFS directory sharing. A privileged attacker inside the guest could use this issue to access files on the host file system outside of the shared directory and possibly escalate their privileges. In the default installation, when QEMU is used with libvirt, attackers would be isolated by the libvirt AppArmor profile. (CVE-2016-9602)

Gerd Hoffmann discovered that QEMU incorrectly handled the Cirrus VGA device when being used with a VNC connection. A privileged attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service, or possibly execute arbitrary code on the host. In the default installation, when QEMU is used with libvirt, attackers would be isolated by the libvirt AppArmor profile. (CVE-2016-9603)

Li Qiang discovered that QEMU incorrectly handled the Virtio GPU device. An attacker inside the guest could use this issue to cause QEMU to leak contents of host memory. (CVE-2016-9908)

Li Qiang discovered that QEMU incorrectly handled the Virtio GPU device. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2016-9912, CVE-2017-5552, CVE-2017-5578)

Li Qiang discovered that QEMU incorrectly handled VirtFS directory sharing. A privileged attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2016-9914)

Jiang Xin and Wjjzhang discovered that QEMU incorrectly handled SDHCI device emulation. A privileged attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2017-5987)

Li Qiang discovered that QEMU incorrectly handled USB OHCI controller emulation. A privileged attacker inside the guest could use this issue to cause QEMU to hang, resulting in a denial of service. (CVE-2017-6505)

Update instructions:

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

Ubuntu 17.04:
qemu-system 1:2.8+dfsg-3ubuntu2.1
qemu-system-aarch64 1:2.8+dfsg-3ubuntu2.1
qemu-system-arm 1:2.8+dfsg-3ubuntu2.1
qemu-system-mips 1:2.8+dfsg-3ubuntu2.1
qemu-system-misc 1:2.8+dfsg-3ubuntu2.1
qemu-system-ppc 1:2.8+dfsg-3ubuntu2.1
qemu-system-s390x 1:2.8+dfsg-3ubuntu2.1
qemu-system-sparc 1:2.8+dfsg-3ubuntu2.1
qemu-system-x86 1:2.8+dfsg-3ubuntu2.1

After a standard system update you need to restart all QEMU virtual machines to make all the necessary changes.

References:
http://www.ubuntu.com/usn/usn-3268-1
CVE-2016-10028, CVE-2016-8667, CVE-2016-9602, CVE-2016-9603,
CVE-2016-9908, CVE-2016-9912, CVE-2016-9914, CVE-2017-5552,
CVE-2017-5578, CVE-2017-5987, CVE-2017-6505

Package Information:
https://launchpad.net/ubuntu/+source/qemu/1:2.8+dfsg-3ubuntu2.1