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NETGEAR Exposure of Sensitive Information - Security Advisory - SOS-12-005

Sense of Security - Security Advisory - SOS-12-005

Release Date.              13-May-2012
Last Update. - Vendor Notification Date. 06-Mar-2012
Product.                   NETGEAR WNDRMAC
Platform.                  Hardware
Affected versions. and below
Severity Rating. High Impact. Exposure of sensitive information
Attack Vector.             From remote without authentication
Solution Status. Currently no software update; the vulnerable functionality can be disabled
CVE reference.             CVE - not yet assigned

The NETGEAR Wireless Extreme for Mac computer and PCs (WNDRMAC) is a N600 wireless dual-band gigabit router. The router discloses sensitive information in the page source, if a previous password recovery has been successfully completed, which allows an attacker to login to the device.
Proof of Concept.
Viewing the source code of the page you are presented with when
you fail to login successfully with the administrator account exposes the routers serial number which is required to get to the recovery questions section.

<HTML><HEAD><LINK rel="stylesheet" href="/style/form.css">
<TITLE> 401 Authorization</TITLE>
<META http-equiv=content-type content='text/html; charset=UTF-8'>
function loadvalue()
       var enable_recovery="1";
       var enter_sn_again="0";
 var last_error_sn="2T82195D0093D";
       if( enable_recovery == "1" )

Viewing the source code of the recovery questions page allows an attacker to view the answers to the password recovery questions. After submitting these answers you are presented with the current administrator credentials.

<TITLE> Router Password Recovery</TITLE>
<META http-equiv=content-type content='text/html; charset=UTF-8'>
<LINK rel="stylesheet" href="/style/form.css">
var quest1_1="What was the name of the first NETGEAR product you purchased?";
var quest1_2="What was the name of the first school you attended?";
function loadvalue()
var answer_again="1";
var last_error_ans1="Answer one";
var last_error_ans2="Answer two";

Disable the password recovery option.

Discovered by.
Nathaniel Carew from Sense of Security Labs.

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