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Security Advisory

USN-2806-1 Linux kernel vulnerability

USN-2806-1 Linux kernel vulnerability

Severity

High

Vendor

Vivid

Versions Affected

  • Ubuntu 14.04

Description

Ben Serebrin discovered that the KVM hypervisor implementation in the Linux kernel did not properly catch Alignment Check exceptions. An attacker in a guest virtual machine could use this to cause a denial of service (system crash) in the host OS.

The Cloud Foundry project released a BOSH stemcell version 3130 that has the patched version of the Linux kernel.

Affected Products and Versions

Severity is high unless otherwise noted.

  • All versions of Cloud Foundry BOSH stemcells prior to 3130 have versions of the kernel vulnerable to USN-2806-1.

Mitigation

Users of affected versions should apply the following mitigation:

  • The Cloud Foundry project recommends that Cloud Foundry deployments run with BOSH stemcells 3130 or later versions.

Credit

Ben Serebrin

References

Cloud Foundry Foundation Security Team Profile Image

Cloud Foundry Foundation Security Team, AUTHOR

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