Vulnerability CVE-2011-5053
Published: 2012-01-06   Modified: 2012-02-13

Description:
The Wi-Fi Protected Setup (WPS) protocol, when the "external registrar" authentication method is used, does not properly inform clients about failed PIN authentication, which makes it easier for remote attackers to discover the PIN value, and consequently discover the Wi-Fi network password or reconfigure an access point, by reading EAP-NACK messages.

CVSS2 => (AV:N/AC:M/Au:N/C:P/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5.8/10
4.9/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
None
Affected software
Wi-fi -> Wifi protected setup protocol 

 References:
http://www.us-cert.gov/cas/techalerts/TA12-006A.html
http://www.kb.cert.org/vuls/id/723755
http://tools.cisco.com/security/center/content/CiscoSecurityResponse/cisco-sr-20120111-wps
http://sviehb.wordpress.com/2011/12/27/wi-fi-protected-setup-pin-brute-force-vulnerability/
http://sviehb.files.wordpress.com/2011/12/viehboeck_wps.pdf
http://code.google.com/p/reaver-wps/
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