Wednesday 4 November
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Two Xen hypervisor flaws let a malicious VM read and write other VMs' memory

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High
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1

Two flaws in the hypervisor allow a malicious guest VM to read and write the memory of other VMs on the same host, including dom0, which by default has full permissions and manages the others. The Xen Project published an advisory on November 3 saying patches are out and no mitigation is known. All Xen versions from 4.6 onward are reported as vulnerable.

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What to do

  1. Apply the patches from the Xen Project advisory to Xen hosts.
  2. Check whether any hypervisors in use run Xen 4.6 or later, since all those versions are affected.

Written by AI from the sources, checked against them

Full story timeline · 1 update

  1. Wed 4 NovemberXen Hypervisor Flaws Let One Malicious VM Read and Write Any Other VM's MemoryThe Hacker News

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