Issued:
2017-07-05
Updated:
2017-07-05

RHSA-2017:1682 - 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):

  • Quick Emulator (QEMU) built with Network Block Device (NBD) Server support was vulnerable to a null-pointer dereference issue. The flaw could occur when releasing a client, which was not initialized due to failed negotiation. A remote user or process could exploit this flaw to crash the qemu-nbd server (denial of service). (CVE-2017-9524)

Bug Fix(es):

  • Previously, when the data plane was in use, changing the target image of a virtual SCSI CD device caused the guest to terminate unexpectedly with a core dump. With this update, the virtio-scsi bus rejects SCSI CDs when the data plane is active, which prevents the crash from occurring. Note that this is a temporary solution, and a full fix to make the data plane and SCSI CD compatible will be provided in the future. (BZ#1461837)

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-rhev-2.6.0-28.el7_3.12.x86_64.rpm
  • qemu-img-rhev-2.6.0-28.el7_3.12.ppc64le.rpm
  • qemu-kvm-rhev-debuginfo-2.6.0-28.el7_3.12.x86_64.rpm
  • qemu-kvm-tools-rhev-2.6.0-28.el7_3.12.x86_64.rpm
  • qemu-kvm-common-rhev-2.6.0-28.el7_3.12.ppc64le.rpm
  • qemu-kvm-rhev-2.6.0-28.el7_3.12.ppc64le.rpm
  • qemu-kvm-rhev-2.6.0-28.el7_3.12.src.rpm
  • qemu-kvm-common-rhev-2.6.0-28.el7_3.12.x86_64.rpm
  • qemu-kvm-rhev-debuginfo-2.6.0-28.el7_3.12.ppc64le.rpm
  • qemu-kvm-tools-rhev-2.6.0-28.el7_3.12.ppc64le.rpm
  • qemu-img-rhev-2.6.0-28.el7_3.12.x86_64.rpm

Fixes

CVEs

References

Additional information