qemu, qemu-kvm vulnerabilities

30 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 versions:

Ubuntu 13.10

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

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

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

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

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

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

qemu-system-x86 - 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: https://wiki.ubuntu.com/Security/Upgrades.

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