Cisco 2975 - Catalyst LAN Base Switch Bedienungsanleitung PDF herunterladen (Seite 9)

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© 2006 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialPresentation_ID

17

ARP Spoofing Attack – The Man-in-the-

Middle

Real

Default

Gateway

10.1.1.1

Gratuitous ARP

(ARP Reply) –

“I’m 10.1.1.1”

ARPs for default

gateway

 Attacker only needs to be attached on same

subnet as one victim – sends Gratuitious

ARP onto subnet.

 IP/ARP bindings incorrectly set at innocent

endstation

 Tools Easily Downloadable and is simpler

than most video games (GUI or CLI)

Snoops

Data

© 2006 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialPresentation_ID

18

A Simple Tool, Some Dangerous

Consequences…

 Neither the victim nor the default

gateway is aware of the attack

 Passwords can be snooped

 Client, employee or company-

confidential information can be

compromised

Stealing Passwords

Email Server

Si

Si

Victim

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