Bypassing NAC v2.0 - OSSIR

More documents

Recommendations

Info

Cisco NAC Framework• Static ExceptionsWeaknessesUnmanaged Elements– “Hosts that cannot run the CTA (Cisco Trust Agent) can be grantedaccess to the network using manually configured exceptions byMAC or IP address on the router or ACS. Exceptions by devicetypes such as Cisco IP phones can also be permitted using CDP onthe router. “ - Cisco NAC FAQ– There is no knowledge about the exception element (i.e. OS, exactlocation, and other properties)– It is possible to spoof the MAC address and/or the IP address of anexception is order to receive the same access that element has tothe enterprise network
Cisco NAC FrameworkWeaknessesUnmanaged Elements• Dynamic Audit– “The newest component in the NAC solution is the audit server,which applies vulnerability assessment (VA) technologies todetermine the level of compliance or risk of a host prior to networkadmission. “• The level of response from various elements is questionable• Many elements uses a personal firewall by default (even if theelement is responsive, closing all “hatches” may still grantaccess to the network)
Page 4 and 5:
Introduction
Page 6 and 7:
IntroductionThe Problem• An enter
Page 8 and 9:
Introduction“My” NAC is not “
Page 10 and 11:
Capabilities
Page 12 and 13:
CapabilitiesNAC Functions• The fo
Page 14 and 15:
CapabilitiesNAC Functions- Remediat
Page 16 and 17:
Attack Vectors
Page 18 and 19:
Bypassing NACBackground
Page 20 and 21:
Element DetectionQuestions to Ask
Page 22 and 23:
BasicsQuarantine• There are a var
Page 24 and 25: QuarantineQuestions to Ask• How d
Page 26 and 27: Enforcement• How is enforcement p
Page 28 and 29: End-point Compliance Assessment•
Page 30 and 31: End Point Compliance AssessmentAgen
Page 32 and 33: Bypassing NACExamples
Page 34 and 35: Bypassing NACExamples• The exampl
Page 36 and 37: DHCP ProxyArchitecture
Page 38 and 39: DHCP ProxyInformation Exchange
Page 40 and 41: DHCP ProxyWeaknesses• Detected el
Page 42 and 43: DHCP ProxyWeaknesses• Not able to
Page 44 and 45: Authenticated DHCPorDHCP In-a-Box
Page 46 and 47: DHCP In-A-BoxArchitecture
Page 48 and 49: DHCP In-A-BoxStrengths• Theoretic
Page 50 and 51: DHCP In-A-BoxRogue DHCP Server
Page 52 and 53: Broadcast Listeners
Page 54 and 55: Broadcast ListenersArchitecture: Ma
Page 56 and 57: Broadcast ListenersWeaknesses• So
Page 58 and 59: Broadcast ListenersWeaknesses• Un
Page 60 and 61: Switch IntegrationSNMP Traps
Page 62 and 63: SNMP TrapsWeaknesses• Must rely o
Page 64 and 65: 802.1x
Page 66 and 67: 802.1x• Exceptions- Hosts that do
Page 68 and 69: Architecture• Components- Cisco T
Page 70 and 71: Cisco NAC FrameworkInformation Exch
Page 72 and 73: Cisco NAC FrameworkWeaknesses• Wo
Page 76 and 77: Cisco NAC FrameworkWeaknesses• No
Page 78 and 79: In-Line Devices
Page 80 and 81: In-Line DevicesWeaknesses• No kno
Page 82 and 83: In-Line DevicesWeaknesses• Not ab
Page 84 and 85: Out-of-Band DevicesArchitecture
Page 86 and 87: Out-of-Band DevicesWeaknesses• In
Page 88 and 89: The End-Result• A (very) confused
Page 90 and 91: Resources• Microsoft NAPhttp://ww
show all

Bypassing NAC v2.0 - OSSIR

Create successful ePaper yourself

Delete template?

Save as template?