Issued:
2016-08-09
Updated:
2016-08-09

RHSA-2016:1585 - Moderate: qemu-kvm security update

Synopsis

Moderate: qemu-kvm security update

Type/Severity

Security Advisory Moderate

Topic

An update for qemu-kvm is now available for Red Hat Enterprise Linux 6.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on AMD64 and Intel 64 systems. The qemu-kvm packages provide the user-space component for running virtual machines using KVM.

Security Fix(es):

  • Quick emulator(Qemu) built with the virtio framework is vulnerable to an unbounded memory allocation issue. It was found that a malicious guest user could submit more requests than the virtqueue size permits. Processing a request allocates a VirtQueueElement and therefore causes unbounded memory allocation on the host controlled by the guest. (CVE-2016-5403)

Red Hat would like to thank hongzhenhao (Marvel Team) for reporting this issue.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

After installing this update, shut down all running virtual machines. Once all virtual machines have shut down, start them again for this update to take effect.

Affected Products

ProductVersionArch
Red Hat Enterprise Linux for Scientific Computing6x86_64
Red Hat Enterprise Linux for Power, big endian6ppc64
Red Hat Enterprise Linux Workstation6x86_64
Red Hat Enterprise Linux Workstation6i386
Red Hat Enterprise Linux Server6x86_64
Red Hat Enterprise Linux Server6i386
Red Hat Enterprise Linux Server - Extended Life Cycle Support6x86_64
Red Hat Enterprise Linux Server - Extended Life Cycle Support6i386
Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension6x86_64
Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension6i386
Red Hat Enterprise Linux Desktop6x86_64
Red Hat Enterprise Linux Desktop6i386

Updated Packages

  • qemu-guest-agent-0.12.1.2-2.491.el6_8.3.i686.rpm
  • qemu-kvm-0.12.1.2-2.491.el6_8.3.x86_64.rpm
  • qemu-guest-agent-0.12.1.2-2.491.el6_8.3.ppc64.rpm
  • qemu-kvm-debuginfo-0.12.1.2-2.491.el6_8.3.i686.rpm
  • qemu-kvm-tools-0.12.1.2-2.491.el6_8.3.x86_64.rpm
  • qemu-guest-agent-0.12.1.2-2.491.el6_8.3.x86_64.rpm
  • qemu-kvm-debuginfo-0.12.1.2-2.491.el6_8.3.ppc64.rpm
  • qemu-kvm-0.12.1.2-2.491.el6_8.3.src.rpm
  • qemu-kvm-debuginfo-0.12.1.2-2.491.el6_8.3.x86_64.rpm
  • qemu-img-0.12.1.2-2.491.el6_8.3.x86_64.rpm

Fixes

CVEs

References

Additional information