Issued:
2017-06-13
Updated:
2017-06-13

RHSA-2017:1431 - Important: qemu-kvm-rhev security and bug fix update

Synopsis

Important: qemu-kvm-rhev security and bug fix update

Type/Severity

Security Advisory Important

Topic

An update for qemu-kvm-rhev is now available for RHEV 3.X Hypervisor and Agents for RHEL-7 and RHEV 4.X RHEV-H and Agents for RHEL-7.

Red Hat Product Security has rated this update as having a security impact of Important. 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 a variety of architectures. The qemu-kvm-rhev packages provide the user-space component for running virtual machines that use KVM in environments managed by Red Hat products.

Security Fix(es):

  • An out-of-bounds access issue was found in QEMU's Cirrus CLGD 54xx VGA Emulator support. The vulnerability could occur while copying VGA data using bitblt functions (for example, cirrus_bitblt_rop_fwd_transp_). A privileged user inside a guest could use this flaw to crash the QEMU process, resulting in denial of service. (CVE-2017-7718)

Red Hat would like to thank Jiangxin (PSIRT Huawei Inc.) for reporting CVE-2017-7718.

Bug Fix(es):

  • When using post-copy migration with the virtio Random Number Generator (RNG) device, virtio-rng continued generating data while the migration was already in post-copy mode. Consequently, the migration sometimes failed and the error message "Failed to load virtio-rng:virtio" was displayed. The source code has been improved and the problem no longer occurs in the scenario described. (BZ#1450375)

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 Virtualization4x86_64
Red Hat Virtualization3x86_64
Red Hat Virtualization for IBM Power LE4ppc64le
Red Hat Virtualization for IBM Power LE3ppc64le

Updated Packages

  • qemu-kvm-tools-rhev-2.6.0-28.el7_3.10.ppc64le.rpm
  • qemu-kvm-tools-rhev-2.6.0-28.el7_3.10.x86_64.rpm
  • qemu-kvm-rhev-2.6.0-28.el7_3.10.ppc64le.rpm
  • qemu-kvm-rhev-debuginfo-2.6.0-28.el7_3.10.x86_64.rpm
  • qemu-kvm-rhev-debuginfo-2.6.0-28.el7_3.10.ppc64le.rpm
  • qemu-kvm-rhev-2.6.0-28.el7_3.10.src.rpm
  • qemu-kvm-common-rhev-2.6.0-28.el7_3.10.x86_64.rpm
  • qemu-img-rhev-2.6.0-28.el7_3.10.ppc64le.rpm
  • qemu-img-rhev-2.6.0-28.el7_3.10.x86_64.rpm
  • qemu-kvm-common-rhev-2.6.0-28.el7_3.10.ppc64le.rpm
  • qemu-kvm-rhev-2.6.0-28.el7_3.10.x86_64.rpm

Fixes

CVEs

References

Additional information