December 17, 2015

Xen Hypervisor Maintenance - December 2015

December 17, 2015

Security of your assets on our cloud platform is very important to the SoftLayer team. Last week, our Security Operations Center – which provides real time monitoring of suspicious activity (including being part of multiple security pre-disclosure lists) – alerted our engineering team to a potential vulnerability (advisory CVE-2015-8555 / XSA-165) in the Xen Hypervisor that if left un-remediated could allow a malicious user to access data from another VSI guest sharing the same hardware node and hypervisor instance.

Upon learning of this vulnerability, SoftLayer issued a notification including a per-data center schedule for applying critical maintenance to remediate the vulnerability. Our schedule was performed over multiple days and on a POD-by-POD basis with individual VM instances being offline for minutes while they rebooted. The updates were completed successfully in all data centers in advance of the public announcement of this vulnerability.

While deployment techniques such as clustering and failover across data centers and PODs allows continuous operations during a planned or unplanned event, you should be aware that SoftLayer is committed to working aggressively to further reduce the impact of events on your deployment and operations teams.

We value your business and will continue to take actions that insure your environment is secure and efficient to operate. If you have any questions or concerns, don't hesitate to reach out to SoftLayer support or your direct SoftLayer contacts.

-Sonny

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