AguascalientesLocalChapter

2nd Meeting

About– ChapterLeader

• JuanGama– ApplicationSecurityEngineer@AspectSecurity– 9+yearsinAppsec,Testing,Development– MaintainerofOWASPBenchmark– IlikeGIFs!

Docker

WhatisDocker?

• "Docker istheworld'sleadingsoftwarecontainerizationplatform"

Whatisacontainer?

• Consistsofanentireruntimeenvironment:anapplication,plusallitsdependencies,librariesandotherbinaries,andconfigurationfilesneededtorunit,bundledintoonepackage.

Docker inventedcontainers?

Docker vs LXC,Jails,Vagrant

• LXCrunsinthehostbuthasit'sownsectionofRAM,CPU,disk,etc.ClosertoaVM.Dockercanbejustoneprocess,needsavolume.

• VagrantisascriptforVMs.

Docker vs Virtualization

• Virtualizationincludesanentireoperatingsystemaswellastheapplication.Docker sitsontopoftheOS

Docker vs Virtualization

Docker vs Virtualization

WhyDocker?

• Solvesdependencyproblemsandtheproblemofancienttimes:

• "Itworksonmymachine!"

Docker Components

• Docker Engine

• Docker Hub

Docker Engine

• Docker daemon– Runsonthehostmachine

• Docker Client– CLIusedtointeractwiththedaemon

• WindowsandOSX– docker-machine(smalllinux runningtheDockerdaemon)- NeedsVirtualbox

Docker WorkflowComponents

• Docker image– Hastheenv,yourapplication,OS,dependencies,

• Docker Container– Createdfromimages,start,stop,move,delete

• Docker Registry– Publicandprivaterepotostoreimages

• Dockerfile– Automatesimageconstruction

Docker

• Docker Container

• Docker Composer

• Docker Swarm

Demo

Docker Security

• Quitesecure.• Namespacesforisolation:processesrunningwithina

containercannotsee,andevenlessaffect,processesrunninginanothercontainer,orinthehostsystem

• Eachcontaineralsogetsitsownnetworkstack.• ControlGroupsforresourceaccountingandlimiting,

ensurethateachcontainergetsitsfairshareofmemory,CPU,diskI/O;and,moreimportantly,thatasinglecontainercannotbringthesystemdownbyexhaustingoneofthoseresources.

Docker Security• OnlytrustedusersshouldbeallowedtocontrolyourDocker daemon

• “root”withinacontainerhasmuchlessprivilegesthanthereal“root”.Forinstance,itispossibleto:– denyall“mount”operations;– denyaccesstorawsockets(topreventpacketspoofing);– denyaccesstosomefilesystem operations,likecreatingnewdevicenodes,changingtheowneroffiles,oralteringattributes(includingtheimmutableflag);

– denymoduleloading;– andmanyothers.

Docker Security

• Additional:AppArmor,SELinux,GRSEC• RuninsideaVM• Compromisedimages• DOS• https://www.docker.com/docker-security