1. Ubuntu Security Notices
  2. USN-2828-1

USN-2828-1: QEMU vulnerabilities

Publication date

3 December 2015

Overview

Several security issues were fixed in QEMU.

Releases

Packages

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

Details

Jason Wang discovered that QEMU incorrectly handled the virtio-net device.
A remote attacker could use this issue to cause guest network consumption,
resulting in a denial of service. (CVE-2015-7295)

Qinghao Tang and Ling Liu discovered that QEMU incorrectly handled the
pcnet driver when used in loopback mode. 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-2015-7504)

Ling Liu and Jason Wang discovered that QEMU incorrectly handled the
pcnet driver. A remote attacker 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...

Jason Wang discovered that QEMU incorrectly handled the virtio-net device.
A remote attacker could use this issue to cause guest network consumption,
resulting in a denial of service. (CVE-2015-7295)

Qinghao Tang and Ling Liu discovered that QEMU incorrectly handled the
pcnet driver when used in loopback mode. 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-2015-7504)

Ling Liu and Jason Wang discovered that QEMU incorrectly handled the
pcnet driver. A remote attacker 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-2015-7512)

Qinghao Tang discovered that QEMU incorrectly handled the eepro100 driver.
A malicious guest could use this issue to cause an infinite loop, leading
to a denial of service. (CVE-2015-8345)

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
15.10 wily qemu-system –  1:2.3+dfsg-5ubuntu9.1
qemu-system-aarch64 –  1:2.3+dfsg-5ubuntu9.1
qemu-system-arm –  1:2.3+dfsg-5ubuntu9.1
qemu-system-mips –  1:2.3+dfsg-5ubuntu9.1
qemu-system-misc –  1:2.3+dfsg-5ubuntu9.1
qemu-system-ppc –  1:2.3+dfsg-5ubuntu9.1
qemu-system-sparc –  1:2.3+dfsg-5ubuntu9.1
qemu-system-x86 –  1:2.3+dfsg-5ubuntu9.1
15.04 vivid qemu-system –  1:2.2+dfsg-5expubuntu9.7
qemu-system-aarch64 –  1:2.2+dfsg-5expubuntu9.7
qemu-system-arm –  1:2.2+dfsg-5expubuntu9.7
qemu-system-mips –  1:2.2+dfsg-5expubuntu9.7
qemu-system-misc –  1:2.2+dfsg-5expubuntu9.7
qemu-system-ppc –  1:2.2+dfsg-5expubuntu9.7
qemu-system-sparc –  1:2.2+dfsg-5expubuntu9.7
qemu-system-x86 –  1:2.2+dfsg-5expubuntu9.7
14.04 trusty qemu-system –  2.0.0+dfsg-2ubuntu1.21
qemu-system-aarch64 –  2.0.0+dfsg-2ubuntu1.21
qemu-system-arm –  2.0.0+dfsg-2ubuntu1.21
qemu-system-mips –  2.0.0+dfsg-2ubuntu1.21
qemu-system-misc –  2.0.0+dfsg-2ubuntu1.21
qemu-system-ppc –  2.0.0+dfsg-2ubuntu1.21
qemu-system-sparc –  2.0.0+dfsg-2ubuntu1.21
qemu-system-x86 –  2.0.0+dfsg-2ubuntu1.21
12.04 precise qemu-kvm –  1.0+noroms-0ubuntu14.26

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References

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