Ubuntu 12.04 LTS / 14.04 LTS / 15.04 : qemu, qemu-kvm vulnerabilities (USN-2724-1)

Ubuntu Security Notice (C) 2015-2016 Canonical, Inc. / NASL script (C) 2015-2016 Tenable Network Security, Inc.


Synopsis :

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

Description :

It was discovered that QEMU incorrectly handled a PRDT with zero
complete sectors in the IDE functionality. A malicious guest could
possibly use this issue to cause a denial of service. This issue only
affected Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. (CVE-2014-9718)

Donghai Zhu discovered that QEMU incorrectly handled the RTL8139
driver. A malicious guest could possibly use this issue to read
sensitive information from arbitrary host memory. (CVE-2015-5165)

Donghai Zhu discovered that QEMU incorrectly handled unplugging
emulated block devices. A malicious guest could use this issue to
cause a denial of service, or possibly execute arbitrary code on the
host as the user running the QEMU process. In the default
installation, when QEMU is used with libvirt, attackers would be
isolated by the libvirt AppArmor profile. This issue only affected
Ubuntu 15.04. (CVE-2015-5166)

Qinghao Tang and Mr. Zuozhi discovered that QEMU incorrectly handled
memory in the VNC display driver. A malicious guest could use this
issue to cause a denial of service, or possibly execute arbitrary code
on the host as the user running the QEMU process. In the default
installation, when QEMU is used with libvirt, attackers would be
isolated by the libvirt AppArmor profile. This issue only affected
Ubuntu 15.04. (CVE-2015-5225)

It was discovered that QEMU incorrectly handled the virtio-serial
device. A malicious guest could use this issue to cause a denial of
service, or possibly execute arbitrary code on the host as the user
running the QEMU process. In the default installation, when QEMU is
used with libvirt, attackers would be isolated by the libvirt AppArmor
profile. This issue only affected Ubuntu 14.04 LTS and Ubuntu 15.04.
(CVE-2015-5745).

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

Family: Ubuntu Local Security Checks

Nessus Plugin ID: 85683 ()

Bugtraq ID:

CVE ID: CVE-2014-9718
CVE-2015-5165
CVE-2015-5166
CVE-2015-5225
CVE-2015-5745

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