1. Ubuntu Security Notices
  2. USN-2439-1

USN-2439-1: QEMU vulnerabilities

Publication date

11 December 2014

Overview

Several security issues were fixed in QEMU.

Releases

Packages

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

Details

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)

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

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
14.10 utopic 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
14.04 trusty 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
12.04 precise qemu-kvm –  1.0+noroms-0ubuntu14.21
10.04 lucid qemu-kvm –  0.12.3+noroms-0ubuntu9.26

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References

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