USN-2342-1: QEMU vulnerabilities

8 September 2014

qemu, qemu-kvm vulnerabilities

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

  • 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, Anthony Liguori, and Michael Roth discovered multiple issues with QEMU state loading after migration. An attacker able to modify the state data could use these issues to cause a denial of service, or possibly execute arbitrary code. (CVE-2013-4148, CVE-2013-4149, CVE-2013-4150, CVE-2013-4151, CVE-2013-4526, CVE-2013-4527, CVE-2013-4529, CVE-2013-4530, CVE-2013-4531, CVE-2013-4532, CVE-2013-4533, CVE-2013-4534, CVE-2013-4535, CVE-2013-4536, CVE-2013-4537, CVE-2013-4538, CVE-2013-4539, CVE-2013-4540, CVE-2013-4541, CVE-2013-4542, CVE-2013-6399, CVE-2014-0182, CVE-2014-3461)

Kevin Wolf, Stefan Hajnoczi, Fam Zheng, Jeff Cody, Stefan Hajnoczi, and others discovered multiple issues in the QEMU block drivers. An attacker able to modify disk images could use these issues to cause a denial of service, or possibly execute arbitrary code. (CVE-2014-0142, CVE-2014-0143, CVE-2014-0144, CVE-2014-0145, CVE-2014-0146, CVE-2014-0147, CVE-2014-0222, CVE-2014-0223)

It was discovered that QEMU incorrectly handled certain PCIe bus hotplug operations. A malicious guest could use this issue to crash the QEMU host, resulting in a denial of service. (CVE-2014-3471)

Update instructions

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

Ubuntu 14.04 LTS
qemu-system - 2.0.0+dfsg-2ubuntu1.3
qemu-system-aarch64 - 2.0.0+dfsg-2ubuntu1.3
qemu-system-arm - 2.0.0+dfsg-2ubuntu1.3
qemu-system-mips - 2.0.0+dfsg-2ubuntu1.3
qemu-system-misc - 2.0.0+dfsg-2ubuntu1.3
qemu-system-ppc - 2.0.0+dfsg-2ubuntu1.3
qemu-system-sparc - 2.0.0+dfsg-2ubuntu1.3
qemu-system-x86 - 2.0.0+dfsg-2ubuntu1.3
Ubuntu 12.04 LTS
qemu-kvm - 1.0+noroms-0ubuntu14.17
Ubuntu 10.04 LTS
qemu-kvm - 0.12.3+noroms-0ubuntu9.24

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.