USN-2092-1: QEMU vulnerabilities

Releases

• Ubuntu 13.10
• Ubuntu 12.10
• Ubuntu 12.04

Packages

• 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 versions:

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

• qemu-kvm - 1.0+noroms-0ubuntu14.13

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