Document Title: =============== Huawei Flybox B660 - (POST SMS) CSRF Web Vulnerability Date: ===== 2017-01-12 References: =========== VL-ID: ===== 2026 Common Vulnerability Scoring System: ==================================== 4.4 Introduction: ============= The Huawei B660 has a web interface for configuration. You can use any web browser you like to login to the Huawei B660. (Copy of the Homepage: ) Abstract: ========= The vulnerability laboratory core research team discovered a security flaw that affects the official Huawei Flybox B660 3G/4G router product series. Report-Timeline: ================ 2017-01-12: Public Disclosure (Vulnerability Laboratory) Status: ======== Published Affected Products: ================== Huawei Product: Flybox - Router (Web-Application) vB660 3G/4G Exploitation-Technique: ======================= Remote Severity: ========= Medium Details: ======== A remote cross-site request forgery vulnerability has been discovered in the official Huawei Flybox B660 3G/4G router product series. The security vulnerability allows a remote attacker to perform unauthenticated application requests with non-expired browser session credentials to unauthorized execute specific backend functions. The vulnerability is located in the `/htmlcode/html/sms.cgi` and `/htmlcode/html/sms_new.asp` modules and the `RequestFile` parameter of the localhost path URL. Remote attackers are able to send sms messages as malicious bomb to other phone numbers from any Huawei Flybox B660 via unauthenticated POST method request. The security risk of the csrf web vulnerability is estimated as medium with a cvss (common vulnerability scoring system) count of 4.4. Exploitation of the csrf web vulnerability requires a low privilege web-application user account and medium or high user interaction. Successful exploitation of the vulnerability results in unauthenticated application requests and manipulation of affected or connected device backend modules. Request Method(s): [+] POST Vulnerable Module(s): [+] /htmlcode/html/sms.cgi [+] /htmlcode/html/sms_new.asp Vulnerable Parameter(s): [+] RequestFile Software version of the modem: 1066. Hardware version of the modem: WLB3TCLU Name of the device: B660 Hardware version of the router: WL1B660I001 Software version of the router: 1066. Proof of Concept: ================= The security vulnerability can be exploited by remote attackers without privilege web-application user account and with medium or high user interaction. For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue. PoC: CSRF Exploit
--- PoC Session Logs [POST] --- /htmlcode/html/sms.cgi?RequestFile=/htmlcode/html/sms_new.asp HTTP/1.1 Host: localhost User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Firefox/31.0 Iceweasel/31.4.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-US,en;q=0.5 Accept-Encoding: gzip, deflate Referer: http://localhost/htmlcode/html/sms.cgi?RequestFile=/htmlcode/html/sms.asp Connection: keep-alive Content-Type: application/x-www-form-urlencoded Content-Length: 2059 action=Send&action=Send&sms_text_mode=1&sms_content_1=‡Malicious Site + IP Adress/Redirection + File‰:=‡download‰&sms_num=1&station= ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,&phone_numbers=[Victim PhoneNumber]&page=sms_new.asp HTTP/1.1 200 OK CACHE-CONTROL: no-cache Content-Type: text/html Content-Length: 364 replace Note: Attackers can as well put an auto-submit java-script generated form inside an high traffic website tp exploit. Risk: ===== The security risk of the cross site request forgery vulnerability in the Huawei Flybox B660 3G/4G router product series is estimated as medium. (CVSS 4.4) Credits: ======== SaifAllah benMassaoud - ( ) Disclaimer: =========== The information provided in this advisory is provided as it is without any warranty. Vulnerability Lab disclaims all warranties, either expressed or implied, including the warranties of merchantability and capability for a particular purpose. Vulnerability-Lab or its suppliers are not liable in any case of damage, including direct, indirect, incidental, consequential loss of business profits or special damages, even if Vulnerability-Lab or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability mainly for consequential or incidental damages so the foregoing limitation may not apply. We do not approve or encourage anybody to break any licenses, policies, deface websites, hack into databases or trade with stolen data. Domains: - - Section: - - Social: - - Feeds: - - Programs: - - Any modified copy or reproduction, including partially usages, of this file, resources or information requires authorization from Vulnerability Laboratory. Permission to electronically redistribute this alert in its unmodified form is granted. All other rights, including the use of other media, are reserved by Vulnerability-Lab Research Team or its suppliers. All pictures, texts, advisories, source code, videos and other information on this website is trademark of vulnerability-lab team & the specific authors or managers. To record, list, modify, use or edit our material contact (admin@) to get a ask permission. Copyright © 2017 | Vulnerability Laboratory - [Evolution Security GmbH]™