Virtualization and cloud computing
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Virtualization and Cloud Computing. Virtualization, Cloud and Security Michael Grafnetter. Agenda. Virtualization Security Risks and Solutions Cloud Computing Security Identity Management. Virtualization and Cloud Computing. Virtualization Security Risks and Solutions. Blue Pill Attack.

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Virtualization and cloud computing

Virtualization and Cloud Computing

Virtualization, Cloud and Security

Michael Grafnetter



  • Virtualization Security Risks and Solutions

  • Cloud Computing Security

  • Identity Management

Virtualization and cloud computing1

Virtualization and Cloud Computing

Virtualization SecurityRisks and Solutions

Blue pill attack

Blue Pill Attack

Blue pill attack1

Blue Pill Attack

  • Presented in 2006 by Joanna Rutkowska at Black Hat conference

  • Traps running OS by starting a hypervisor and virtualizing the underlaying machine (needs right to run privileged instructions to achieve this)

  • Could intercept nearly anything and send fake responses (hardware interrupts, requests for data, system time etc.)

Red pill

Red Pill

  • Blue Pill is detectable by timing attack

    • Trap-and-Emulate takes much longer than native instructions

    • External time sources (NTP) need to be used, because system time could be spoofed

Vmm vulnerability

VMM Vulnerability

  • By attacking a VMM, one could attack multiple servers at once

Datacenter management sw

Datacenter Management SW

  • Virtualization infrastructure management software (VMware vCenter, Microsoft SC VMM) is used to control multiple hostsat once

Web access to dcs

Web Access to DCs

  • Multiple datacenters can be managed from a central console. Therefore, its security has to be hardened.

One ring to rule them all

One Ring to rule them all…

  • Management commands available using PowerShell or Web APIs

    • Get-VM –Name * | Stop-VM

    • Get-VM –Name * | Remove-VM

    • Copy-VMGuestFile

    • Invoke-VMScript–Type Bash

Virtualization and cloud computing


DoS attack on virtualization infrastructure

Disabling host vm communication

Disabling Host-VM Communication

Physical vs virtual firewall

Physical vs. Virtual Firewall

  • With virtualization, servers from different Trust Zones usually share the same physical resources (memory, network card, etc.)

Traffic isolation

Traffic isolation

Virtualization and cloud computing


Configuring traffic isolationon VmwareESXi

Other risks of virtualization

Other risks of virtualization

  • Introduction of yet another OS

  • Reliance on traditional barriers

  • Accelerated provisioning

  • Security left to non-traditional security staff

  • Audit scope creep

Security solutions

Security Solutions

  • Virtual Firewall

    • Live migration

    • Stretched clusters

  • Agentless Antivirus

  • Extensible Switches

  • Mobile Virtualization Platform

  • Virtual Desktop Infrastructure (VDI)

Agentless av

Agentless AV

Extensible switch

Extensible Switch

Mobile virtualization platform

Mobile Virtualization Platform

Mobile virtualization platform1

Mobile Virtualization Platform

Mobile virtualization platform2

Mobile Virtualization Platform

  • Supported devices

Virtual desktop infrastructure

Virtual Desktop Infrastructure

Virtualization and cloud computing2

Virtualization and Cloud Computing

Cloud Computing Security Risks

Who has access to our data

Who has access to our data?

Physical security

Physical Security

Hard disk crushers

Hard Disk Crushers

Other cloud risks

Other Cloud Risks

  • Unclear data location

  • Regulatory compliance

  • Data segregation

  • Lack of investigative support

  • Disaster recovery

  • Long-term viability, vendor lock-in

Virtualization and cloud computing3

Virtualization and Cloud Computing

Identity Management

Identity management

Identity Management

  • Basic Concepts

    • External user DBs

    • Two-factor authentication

    • Role-Based Access Control (RBAC)

  • Identity Federation

    • OAuth

    • OpenID

    • SAML

    • RADIUS Proxy

    • Identity Bridges

External user dbs

External User DBs

  • Typically Active Directory or generic LDAP is used as central identity store for virtualization infrastructures

Azure active directory

Azure Active Directory

Two factor authentication

Two-Factor Authentication

Role based access control

Role-Based Access Control

Identity federation

Identity Federation



  • Used to delegate user authorizationto a 3rd-party service provider

Virtualization and cloud computing


Creating a web applicationwith Facebook/Twitter/Microsoft Account authentication





Virtualization and cloud computing


  • Similar to OpenID, but targeted to the enterprise

  • Security Assertion Markup Language

  • XML-based

  • Supports Single sign-on

  • Requires mutual trust between IdP and SP

  • Multiple bindings, not just HTTP

  • Supports Identity provider initiated authentication

Virtualization and cloud computing


Saml google apps

SAML (Google Apps)

Saml example

SAML Example


ID="b07b804c-7c29-ea16-7300-4f3d6f7928ac“ Version="2.0"





NotBefore="2004-12-05T09:17:05" NotOnOrAfter="2004-12-05T09:27:05">



<saml:Attributex500:Encoding="LDAP" Name="urn:oid:" FriendlyName="eduPersonAffiliation">






Microsoft active directory federation services

Microsoft Active Directory Federation Services

  • SAML-based

  • Typically used to give access to intranet portals to business partners



  • SAML-based federation portal

  • Open Source

Virtualization and cloud computing


Signing in to a federatedweb application

Radius proxy eduroam

RADIUS Proxy (Eduroam)

Identity bridges

Identity Bridges

Identity bridges azure access control service

Identity Bridges:Azure Access Control Service

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