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Ubuntu 15.04, 14.04 LTS: USN-2724-1 Moderate: QEMU Denial of Service

ubuntu
Calendar Grey August 27, 2015
Scroller Ubuntu
Remedies for various QEMU vulnerabilities impacting numerous Ubuntu versions are detailed in this advisory notification.
Several security issues were fixed in QEMU.

Summary

Several security issues were fixed in QEMU.

Software Description:

- qemu: Machine emulator and virtualizer

- qemu-kvm: Machine emulator and virtualizer

Details:

It was discovered that QEMU incorrectly handled a PRDT with zero complete

sectors in the IDE functionality. A malicious guest could possibly use

this issue to cause a denial of service. This issue only affected Ubuntu

12.04 LTS and Ubuntu 14.04 LTS. (CVE-2014-9718)

Donghai Zhu discovered that QEMU incorrectly handled the RTL8139 driver.

A malicious guest could possibly use this issue to read sensitive

information from arbitrary host memory. (CVE-2015-5165)

Donghai Zhu discovered that QEMU incorrectly handled unplugging emulated

block devices. 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 A...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service update instructions memory management ubuntu qemu

Update Instructions

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

Ubuntu 15.04:
  qemu-system                     1:2.2+dfsg-5expubuntu9.4
  qemu-system-aarch64             1:2.2+dfsg-5expubuntu9.4
  qemu-system-arm                 1:2.2+dfsg-5expubuntu9.4
  qemu-system-mips                1:2.2+dfsg-5expubuntu9.4
  qemu-system-misc                1:2.2+dfsg-5expubuntu9.4
  qemu-system-ppc                 1:2.2+dfsg-5expubuntu9.4
  qemu-system-sparc               1:2.2+dfsg-5expubuntu9.4
  qemu-system-x86                 1:2.2+dfsg-5expubuntu9.4

Ubuntu 14.04 LTS:
  qemu-system                     2.0.0+dfsg-2ubuntu1.17
  qemu-system-aarch64             2.0.0+dfsg-2ubuntu1.17
  qemu-system-arm                 2.0.0+dfsg-2ubuntu1.17
  qemu-system-mips                2.0.0+dfsg-2ubuntu1.17
  qemu-system-misc                2.0.0+dfsg-2ubuntu1.17
  qemu-system-ppc                 2.0.0+dfsg-2ubuntu1.17
  qemu-system-sparc               2.0.0+dfsg-2ubuntu1.17
  qemu-system-x86                 2.0.0+dfsg-2ubuntu1.17

Ubuntu 12.04 LTS:
  qemu-kvm                        1.0+noroms-0ubuntu14.24

After a standard system update you need to restart all QEMU virtual
machines to make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-2724-1

CVE-2014-9718, CVE-2015-5165, CVE-2015-5166, CVE-2015-5225,

CVE-2015-5745

Severity
important
Lowest
Low
Medium
High
Critical

August 27, 2015

Topics%20covered

Topics Covered

security advisory denial of service update instructions memory management ubuntu qemu

Package Information

https://launchpad.net/ubuntu/+source/qemu/1:2.2+dfsg-5expubuntu9.4
https://launchpad.net/ubuntu/+source/qemu/2.0.0+dfsg-2ubuntu1.17
https://launchpad.net/ubuntu/+source/qemu-kvm/1.0+noroms-0ubuntu14.24

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