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