USN-2439-1: QEMU vulnerabilities

11 December 2014

qemu, qemu-kvm vulnerabilities

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

  • Ubuntu 14.10
  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS
  • Ubuntu 10.04 LTS


Several security issues were fixed in QEMU.

Software Description

  • qemu - Machine emulator and virtualizer
  • qemu-kvm - Machine emulator and virtualizer


Michael S. Tsirkin discovered that QEMU incorrectly handled certain parameters during ram load while performing a migration. An attacker able to manipulate savevm data could use this issue to possibly execute arbitrary code on the host. This issue only affected Ubuntu 12.04 LTS, Ubuntu 14.04 LTS, and Ubuntu 14.10. (CVE-2014-7840)

Paolo Bonzini discovered that QEMU incorrectly handled memory in the Cirrus VGA device. A malicious guest could possibly use this issue to write into memory of the host, leading to privilege escalation. (CVE-2014-8106)

Update instructions

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

Ubuntu 14.10
qemu-system - 2.1+dfsg-4ubuntu6.3
qemu-system-aarch64 - 2.1+dfsg-4ubuntu6.3
qemu-system-arm - 2.1+dfsg-4ubuntu6.3
qemu-system-mips - 2.1+dfsg-4ubuntu6.3
qemu-system-misc - 2.1+dfsg-4ubuntu6.3
qemu-system-ppc - 2.1+dfsg-4ubuntu6.3
qemu-system-sparc - 2.1+dfsg-4ubuntu6.3
qemu-system-x86 - 2.1+dfsg-4ubuntu6.3
Ubuntu 14.04 LTS
qemu-system - 2.0.0+dfsg-2ubuntu1.9
qemu-system-aarch64 - 2.0.0+dfsg-2ubuntu1.9
qemu-system-arm - 2.0.0+dfsg-2ubuntu1.9
qemu-system-mips - 2.0.0+dfsg-2ubuntu1.9
qemu-system-misc - 2.0.0+dfsg-2ubuntu1.9
qemu-system-ppc - 2.0.0+dfsg-2ubuntu1.9
qemu-system-sparc - 2.0.0+dfsg-2ubuntu1.9
qemu-system-x86 - 2.0.0+dfsg-2ubuntu1.9
Ubuntu 12.04 LTS
qemu-kvm - 1.0+noroms-0ubuntu14.21
Ubuntu 10.04 LTS
qemu-kvm - 0.12.3+noroms-0ubuntu9.26

To update your system, please follow these instructions:

After a standard system update you need to reboot your computer to make all the necessary changes.