USN-1692-1: QEMU vulnerability

Ubuntu Security Notice USN-1692-1

16th 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

Update instructions

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

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.