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
Several security issues were fixed in QEMU.
- qemu - Machine emulator and virtualizer
- qemu-kvm - Machine emulator and virtualizer
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.
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)
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-0ubuntu184.108.40.206
- Ubuntu 12.04 LTS:
- qemu-kvm 1.0+noroms-0ubuntu14.13
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to reboot your computer to make
all the necessary changes.