1. Ubuntu Security Notices
  2. USN-2692-1

USN-2692-1: QEMU vulnerabilities

Publication date

28 July 2015

Overview

Several security issues were fixed in QEMU.

Releases

Packages

  • qemu - Machine emulator and virtualizer

Details

Matt Tait discovered that QEMU incorrectly handled PIT emulation. In a
non-default configuration, a malicious guest could use this issue to cause
a denial of service, or possibly execute arbitrary code on the host as the
user running the QEMU process. In the default installation, when QEMU is
used with libvirt, attackers would be isolated by the libvirt AppArmor
profile. (CVE-2015-3214)

Kevin Wolf discovered that QEMU incorrectly handled processing ATAPI
commands. A malicious guest could use this issue to cause a denial of
service, or possibly execute arbitrary code on the host as the user running
the QEMU process. In the default installation, when QEMU is used with
libvirt, attackers would be isolated by the libvirt AppArmor profile.
(CVE-2015-5154)

Zhu Donghai discovered that QEMU incorrectly handled the SCSI driver. A
malicious guest could use...

Matt Tait discovered that QEMU incorrectly handled PIT emulation. In a
non-default configuration, a malicious guest could use this issue to cause
a denial of service, or possibly execute arbitrary code on the host as the
user running the QEMU process. In the default installation, when QEMU is
used with libvirt, attackers would be isolated by the libvirt AppArmor
profile. (CVE-2015-3214)

Kevin Wolf discovered that QEMU incorrectly handled processing ATAPI
commands. A malicious guest could use this issue to cause a denial of
service, or possibly execute arbitrary code on the host as the user running
the QEMU process. In the default installation, when QEMU is used with
libvirt, attackers would be isolated by the libvirt AppArmor profile.
(CVE-2015-5154)

Zhu Donghai discovered that QEMU incorrectly handled the SCSI driver. A
malicious guest could use this issue to cause a denial of service, or
possibly execute arbitrary code on the host as the user running the QEMU
process. In the default installation, when QEMU is used with libvirt,
attackers would be isolated by the libvirt AppArmor profile. This issue
only affected Ubuntu 15.04. (CVE-2015-5158)

Update instructions

After a standard system update you need to restart all QEMU virtual machines 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
15.04 vivid qemu-system –  1:2.2+dfsg-5expubuntu9.3
qemu-system-aarch64 –  1:2.2+dfsg-5expubuntu9.3
qemu-system-arm –  1:2.2+dfsg-5expubuntu9.3
qemu-system-mips –  1:2.2+dfsg-5expubuntu9.3
qemu-system-misc –  1:2.2+dfsg-5expubuntu9.3
qemu-system-ppc –  1:2.2+dfsg-5expubuntu9.3
qemu-system-sparc –  1:2.2+dfsg-5expubuntu9.3
qemu-system-x86 –  1:2.2+dfsg-5expubuntu9.3
14.04 trusty qemu-system –  2.0.0+dfsg-2ubuntu1.15
qemu-system-aarch64 –  2.0.0+dfsg-2ubuntu1.15
qemu-system-arm –  2.0.0+dfsg-2ubuntu1.15
qemu-system-mips –  2.0.0+dfsg-2ubuntu1.15
qemu-system-misc –  2.0.0+dfsg-2ubuntu1.15
qemu-system-ppc –  2.0.0+dfsg-2ubuntu1.15
qemu-system-sparc –  2.0.0+dfsg-2ubuntu1.15
qemu-system-x86 –  2.0.0+dfsg-2ubuntu1.15

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References

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