USN-1692-1: QEMU vulnerability

16 January 2013

qemu-kvm vulnerability

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

  • Ubuntu 12.10
  • Ubuntu 12.04 LTS
  • Ubuntu 11.10
  • Ubuntu 10.04 LTS


QEMU could be made to crash or run programs if it received specially crafted network traffic.

Software Description

  • qemu-kvm - Machine emulator and virtualizer


It was discovered that QEMU incorrectly handled certain e1000 packet sizes. In certain environments, an attacker may use this flaw in combination with large packets to cause a denial of service or execute arbitrary code in the guest.

Update instructions

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

Ubuntu 12.10
qemu-kvm - 1.2.0+noroms-0ubuntu2.12.10.2
Ubuntu 12.04 LTS
qemu-kvm - 1.0+noroms-0ubuntu14.7
Ubuntu 11.10
qemu-kvm - 0.14.1+noroms-0ubuntu6.6
Ubuntu 10.04 LTS
qemu-kvm - 0.12.3+noroms-0ubuntu9.21

To update your system, please follow these instructions:

After a standard system update you need to restart your virtual machines to make all the necessary changes.