XEN Security Update XSA-190/CVE-2016-7777



Affected VersionsFixed
Static Compute ResourcesCloudBoot Compute ResourcesStatic Compute ResourcesCloudBoot Compute Resources
CentOS 5.xCentOS 6.xCentOS 5.xCentOS 6.xCentOS 5.xCentOS 6.xCentOS 5.xCentOS 6.x


CR0.TS and CR0.EM not always honored for X86 HVM guests✓*✓*✓*✓*

* Both Static and CloudBoot compute resources running both under CentOS 5.x and 6.x, running HVM guests (Windows, FreeBSD based, recovery mode or "boot from ISO") are affected.

Static Compute Resources

For customers willing to upgrade to the latest compute resource tools (corresponding to OnApp version installed)

  • This step applies to CentOS 5.x Xen compute resources only. Run the following command:

    # rm -f /etc/yum.repos.d/GITCO-*.repo
    # yum update onapp-hv-install
  • Run the OnApp Xen Compute Resource installer

    # /onapp/onapp-hv-install/onapp-hv-xen-install.sh
  • Reboot all compute resources.

For customers which are using latest compute resource tools or do not want to upgrade them:

  • CentOS 5.x

    # yum update xen xen-libs

    This should update to the xen-3.4.4-25.el5.onapp.x86_64 version.

  • CentOS 6.x

     # yum update xen xen-hypervisor
    • For versions of OnApp HV tools prior to version 4.2.0 this should update to the xen-4.2.5-38.31.onapp.el6.x86_64
    • For versions of OnApp HV tools after version 4.2.0 the fix is provided by CentOS.org. The command above should update to the 4.4.4.-13 version.
  • Reboot all compute resources.

CloudBoot Compute resources

To eliminate the security issue for Cloudboot Compute Resources, see CloudBoot Compute Resources and CloudBoot Backup Server upgrade procedures. For more information on the update, refer to OnApp 5.0 Release Notes

This should update to the following version: