Presentation on theme: "Brute Force Attack Against Wi-Fi Protected Setup"— Presentation transcript:
1 Brute Force Attack Against Wi-Fi Protected Setup Reaver is the Linux tool used to implement a Brute Force Attack against Wi-Fi Protected Setup registrar PINs in order to recover WPA/WPA2 passphrases.
2 HistorySince 2007 the Wi-Fi Alliance provided industry wide setup solutions for home and small business environments.Allows for typical users with little knowledge of wireless configurations and security settings to configure a new wireless network.
3 Wi-Fi Protected Setup (WPS) By default (out-of-the-box) WPS is always active on all devices.WPS is marketed as being secure, however newly discovered design and implementation flaws allow attackers to gain access.Allows users to enter an 8 digit PIN to connect to a secured network without having to enter a passphrase.When the user supplies the correct PIN the access point essentially gives the user the WPA/WPA2 PSK that is needed to connect to the network.
4 Push-Button-ConnectUser pushes a button on both the Access Point and new wireless device (e.g. printer, PC, NIC)
5 Personal Identification Number Internal RegistrarUser enters WPS PIN of the Wi-Fi adapter into the web interface of the Access Point.External RegistrarUser enters WPS PIN of the Access Point into the client device (e.g. PC, laptop)
6 Reaver ToolIs a WPA attack tool developed by Tactical Network Solutions that exploits a protocol flaw in the Wi-Fi Protected Setup (WPS).This vulnerability exposes a side-channel attack against Wi-Fi Protected Access (WPA) versions 1 and 2 allowing the extraction of the Pre-Shared Key (PSK) used to secure the network.Determine an Access Point's PIN and then extract the PSK and give it to the attacker.
7 ResultsAn authentication attempt can take between 0.5 and 3 seconds to complete.Once the PIN of the Access Point has been discovered the Access Point then hands the requesting device the passphrase.
8 Affected Vendor List (not complete) Cisco/LinksysNetgearD-LinkBelkinBuffaloZyXELTechnicolor
9 MitigationDisable WPS, however this may not be available on all devices.
10 ReferencesTactical network solutions. (2011). Retrieved from