Topic: Airspan ProST Modem Management Authentication Bypass Vulnerability
Announced: 2008-03-13 Product: Airspan ProST Antenna Vendor: http://www.airspan.com/ Impact: Remote shell access Affected product: Airspan ProST with firmware < 6.5.40.0, Hardware rev < 4.1 Credits: Francis Lacoste-Cordeau I. BACKGROUND 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. http://www.airspan.com/ II. DESCRIPTION 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. III. EXPLOITATION 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. IV. WORKAROUND There's actually no workaround of this issue. V. VENDOR RESPONSE Airspan has addressed this vulnerability and will fix this problem with a firmware update. VI. DISCLOSURE TIMELINE 15/10/2007 Initial vendor notification 16/10/2007 Initial vendor response 13/03/2008 Coordinated public disclosure VI. CREDIT Francis Lacoste-Cordeau([EMAIL PROTECTED]) is credited with discovering this vulnerability.
