Ubuntu 12.04 LTS / 14.04 LTS / 16.04 LTS : qemu, qemu-kvm vulnerabilities (USN-3047-1)

Ubuntu Security Notice (C) 2016 Canonical, Inc. / NASL script (C) 2016 Tenable Network Security, Inc.


Synopsis :

The remote Ubuntu host is missing one or more security-related
patches.

Description :

Li Qiang discovered that QEMU incorrectly handled 53C9X Fast SCSI
controller emulation. 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. This issue only applied to
Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-4439, CVE-2016-4441,
CVE-2016-5238, CVE-2016-5338, CVE-2016-6351)

Li Qiang and Qinghao Tang discovered that QEMU incorrectly handled the
VMware VGA module. A privileged attacker inside the guest could use
this issue to cause QEMU to crash, resulting in a denial of service,
or possibly to obtain sensitive host memory. (CVE-2016-4453,
CVE-2016-4454)

Li Qiang discovered that QEMU incorrectly handled VMWARE PVSCSI
paravirtual SCSI bus emulation support. A privileged attacker inside
the guest could use this issue to cause QEMU to crash, resulting in a
denial of service. This issue only applied to Ubuntu 14.04 LTS and
Ubuntu 16.04 LTS. (CVE-2016-4952)

Li Qiang discovered that QEMU incorrectly handled MegaRAID SAS 8708EM2
Host Bus Adapter emulation support. A privileged attacker inside the
guest could use this issue to cause QEMU to crash, resulting in a
denial of service, or possibly to obtain sensitive host memory. This
issue only applied to Ubuntu 14.04 LTS and Ubuntu 16.04 LTS.
(CVE-2016-5105, CVE-2016-5106, CVE-2016-5107, CVE-2016-5337)

It was discovered that QEMU incorrectly handled certain iSCSI
asynchronous I/O ioctl calls. An 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. This issue only applied to
Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-5126)

Zhenhao Hong discovered that QEMU incorrectly handled the Virtio
module. A privileged attacker inside the guest could use this issue to
cause QEMU to crash, resulting in a denial of service. (CVE-2016-5403).

Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.

Solution :

Update the affected packages.

Risk factor :

High / CVSS Base Score : 7.2
(CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 5.3
(CVSS2#E:U/RL:OF/RC:C)
Public Exploit Available : false

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