You think your WiFi is safe?

You think your Wifi is Safe? Rob Gillen @argodev

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what we do consulting training design debuggingwho we are Founded by top experts on Microsoft – Jeffrey Richter, Jeff Prosise, and John Robbins – our mission is to help our customers achieve their goals through advanced software-based consulting and training solutions.how we do it Training • On-site instructor-led training Consulting & Debugging • Virtual instructor-led training • Architecture, analysis, and design services • Devscovery conferences • Full lifecycle custom software development • Content creation Design • Project management • User Experience Design • Debugging & performance tuning • Visual & Content Design • Video & Animation Production wintellect.com

Don’t Be StupidThe following presentation describesreal attacks on real systems. Pleasenote that most of the attacksdescribed would be considered ILLEGALif attempted on systems that you donot have explicit permission to testand attack. I assume no responsibilityfor any actions you perform based onthe content of this presentation orsubsequent conversations. Pleaseremember this basic guideline: Withknowledge comes responsibility.

DisclaimerThe content of this presentationrepresents my personal views andthoughts at the present time. Thiscontent is not endorsed by, orrepresentative in any way of myemployer nor is it intended to be aview into my work or a reflection onthe type of work that I or my groupperforms. It is simply a hobby andpersonal interest and should beconsidered as such.

Overview• Pre-Requisite Knowledge• Various Security Approaches• Tools and Attacks

Required Gear• Network Adapter that supports “Monitor” mode. – Equivalent to promiscuous mode on a normal NIC• Windows, MAC, or Linux – Linux tools tend to be more readily available

Wireless Packet Frames• Management Frames • Control Frames – Authentication – Request to Send – De-authentication (RTS) – Association Request – Clear to Send (CTS) – Association Response – Acknowledgment (AWK) – Re-association • Data Frames Request – Re-association Response – Disassociation – Beacon – Probe Request – Probe Response

Packet Sniffing• Filters: – wlan.fc.type • == 0 (mgmt frames) • == 1 (control frames) • == 2 (data frames) – wlan.fc.subtype • == 8 (beacons)• (wlan.fc.type == 0) && (wlan.fc.subtype == 8)

Packet Sniffing• Determine the channel of the network we are interested in – required for sniffing data packets – airodump-ng• iwconfig mon0 channel 11 (demo pre/post)

Packet Injection• aireplay-ng – Inject packets onto a specific wireless network without specific association to that network – Can target specific channels, mask MAC addresses, etc. – Does not require association

Regulatory Issues• Available Channels• Radio Power Levels – iw reg set US – iw reg set BO

DEMO: HIDDEN SSID

DEMO: Hidden SSID• Show packet capture with the SSID• Hide SSID• Prove it is now hidden• Solve for X – Passive (wait for valid client) – wireshark filter – Use aireplay-ng to send deauth packet to force the discovery• Probe Request/Probe Response packets

DEMO: MAC FILTERS

DEMO: MAC Filters• Enable MAC Filtering on the WAP• Prove that a client cannot connect• Use airodump-ng to show associated clients• Use macchanger to spoof the whitelisted address and connect.

DEMO: SHARED KEYAUTHENTICATION

DEMO: Shared Key Authentication• Illustration (steal picture from Wikipedia/netgear?)• Configured AP for Shared Key/Update Client• Use airodump-ng to capture/log the authentication scheme + keystream – Wait for valid client or send deauth pkt• Use aireplay-ng to pass back the captured auth pkt• TIP: DOS by filling up AP tables (wrapper around airreplay-ng)

DEMO: WEP ENCRYPTION

DEMO: WEP Encryption• Capture data packets (ARP) from a known/trusted client (airodump-ng)• Replay them/re-inject between 10- 100,000 times (aireplay-ng)• Crack them (aircrack-ng)• “Guaranteed” crack

DEMO: WPA/2 ENCRYPTION

DEMO: WPA/2 Encryption• Vulnerable to dictionary attacks• Collect authentication handshake• Select dictionary file and run the cracker• Works for WPA, WPA2, AES, TKIP

Tools• Jasegar (Pineapple IV)• I can be anything you want me to be

Man-In-The-Middle

Tools• Reaver Pro (WPS Exploit)• 4-10 hours and your network is mine

What is Safe?• Stop using Wi-Fi• Avoid open Wi-Fi networks• Always use SSL• Use VPN• Disable Auto-Connect… on *all* devices• Hard/complex network keys• WPA-Enterprise / RADIUS / PEAP / EAP-TTLS• Disable WPS!

Equipment List• Two Laptops• Any Wireless Access Point• Alfa Card http://www.amazon.com/gp/product/B002BFMZR8• Yagi Antenna http://www.amazon.com/gp/product/B004L0TKW4• Reaver Kit http://hakshop.myshopify.com/products/reaver -pro• WiFi Pinapple http://hakshop.myshopify.com/collections/fro ntpage/products/wifi-pineapple

Learning More• http://www.securityfocus.com• http://www.aircrack-ng.org• http://raulsiles.com/resources/wif i.html• http://www.willhackforsushi.com

Questions/ContactRob Gillenrob@gillenfamily.nethttp://rob.gillenfamily.net@argodev

You think your WiFi is safe?

by Rob Gillen on Jun 16, 2012

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You think your WiFi is safe? Presentation Transcript