Amazon Confirms That EC2 Reboots Are Due to Xen Issues — Tech News and Analysis
Is this a Xen specific exploit, or does this affect all hypervisors and Xen’s just the first to jump?
Amazon said the Amazon Web Services reboots that customers were notified about on Wednesday will affect about 10 percent of total EC2 instances.
As had been speculated, the cause is a Xen hypervisor issue that must be addressed soon, according to an AWS blog post. The updates have nothing to do with the “Bash Bug” or “shell shock” flaw that is handled in a separate security bulletin on the AWS security center.
Per AWS evangelist Jeff Barr:
These updates must be completed by Oct. 1, before the industry notice comes out on Xen update XSA-108. The issue in that notice affects many Xen environments, and is not an AWS-specific issue. Following security best practices, the details of this update are embargoed until then.
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