shared responsibility in action

Mark Nunnikhoven @marknca

Shared Responsibility

…In Action

MODELLING SECURITY on AWS

Traditional Responsibility Model

!

Operating System

Application

Account Management

You

Facilities

Physical Security

Physical Infrastructure

Network Infrastructure

Virtualization Layer

Shared Responsibility Model

You

Operating System

Application

Account Management

Security Groups

Network Configuration

AWS

Facilities

Physical Security

Physical Infrastructure

Network Infrastructure

Virtualization Layer

More info on the model is available at http://aws.amazon.com/security

Shared Responsibility Model

You

Operating System

Application

Account Management

Security Groups

Network Configuration

AWS

Facilities

Physical Security

Physical Infrastructure

Network Infrastructure

Virtualization

Verify

Compliance information available at http://aws.amazon.com/compliance

Common View

More information on the model at http://aws.amazon.com/security

Infrastructure

Container

Abstract

Better View

From AWS’ Mark Ryland, more info at http://4mn.ca/ZZeDbA

Service Type *aaS

SQS, S3, Route53 Abstract SaaS

RDS, EMR, OpsWorks Container PaaS

EC2, EBS, VPC Infrastructure IaaS

Service Examples

From AWS’ Mark Ryland, more info at http://4mn.ca/ZZeDbA

Less responsibilities

More responsibilities

Distribution of Security

Options : Responsibilities

Distribution of Security

Rough correlation between # of options & level of responsibilities

RE:BOOT

Critical embargoed bug discovered in Xen, details at http://4mn.ca/1rcXTTN

Protecting Instances

A small percentage of instances on EC2 are scheduled for a reboot

For EC2

Nothing for cloud-native architectures

Manage availability for traditional architectures

For RDS

Nothing for Multi-AZ instances

Standard maintenance window for single instances

Actions to Take

POODLE

CVE-2014-3566 : Padding Oracle On Downgraded Legacy Encryption

Attack forces an older cipher choice, details at http://4mn.ca/1EYfBEA

For ELB

Select a non-affected cipher suite (e.g., ELBSecurityPolicy-2014-10)

For Web Servers

Enable TLS_FALLBACK_SCSV

Disable support for SSL 3.0*

Disabling SSL 3.0 may cause compatibility issues

Actions to Take

Shellshock

More info on bash at http://www.gnu.org/software/bash

(){}; attack

10/10 vulnerability : widespread & easy to exploit

Steps to protection

Update bash

Use an intrusion prevention system

Actions to Take

Applied at the boundary

Majority of traditional controls are applied at the boundary

Shifting Controls

Applied to each instance

Same controls required in AWS, now applied to the instance

Shifting Controls

Watch the demo in action at http://4mn.ca/1sY3YK4

“View Source”, find cgi URL to exploit

Run attack via curl

Return contents of /etc/passwd with a simple custom header

Add intrusion prevention controls to the instance

Intrusion prevention resets connection when attack is detected

Options : Responsibilities

Where does you deployment fall on the scale?

Learn more at

testdrive.trendmicro.com

Thank you!

Follow me on Twitter @marknca