Thursday, January 30, 2014

USN-2092-1: QEMU vulnerabilities

Ubuntu Security Notice USN-2092-1


30th January, 2014


qemu, qemu-kvm vulnerabilities


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



  • Ubuntu 13.10

  • Ubuntu 12.10

  • Ubuntu 12.04 LTS


Summary


Several security issues were fixed in QEMU.


Software description



  • qemu - Machine emulator and virtualizer

  • qemu-kvm - Machine emulator and virtualizer


Details


Asias He discovered that QEMU incorrectly handled SCSI controllers with

more than 256 attached devices. A local user could possibly use this flaw

to elevate privileges. (CVE-2013-4344)


It was discovered that QEMU incorrectly handled Xen disks. A local guest

could possibly use this flaw to consume resources, resulting in a denial of

service. This issue only affected Ubuntu 12.10 and Ubuntu 13.10.

(CVE-2013-4375)


Sibiao Luo discovered that QEMU incorrectly handled device hot-unplugging.

A local user could possibly use this flaw to cause a denial of service.

This issue only affected Ubuntu 13.10. (CVE-2013-4377)


Update instructions


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



Ubuntu 13.10:

qemu-system-misc 1.5.0+dfsg-3ubuntu5.3

qemu-system 1.5.0+dfsg-3ubuntu5.3

qemu-system-x86 1.5.0+dfsg-3ubuntu5.3

qemu-system-sparc 1.5.0+dfsg-3ubuntu5.3

qemu-system-arm 1.5.0+dfsg-3ubuntu5.3

qemu-system-ppc 1.5.0+dfsg-3ubuntu5.3

qemu-system-mips 1.5.0+dfsg-3ubuntu5.3

Ubuntu 12.10:

qemu-kvm 1.2.0+noroms-0ubuntu2.12.10.6

Ubuntu 12.04 LTS:

qemu-kvm 1.0+noroms-0ubuntu14.13


To update your system, please follow these instructions: http://bit.ly/1aJDvTw.


After a standard system update you need to reboot your computer to make

all the necessary changes.


References


CVE-2013-4344, CVE-2013-4375, CVE-2013-4377






via Ubuntu Security Notices http://bit.ly/1guT2xV

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