Huawei Flybox B660 3G/4G Router Authentication Bypass
Posted on 19 November 2016
Document Title: =============== Huawei Flybox B660 3G/4G Router - Auth Bypass Vulnerability References (Source): ==================== https://www.vulnerability-lab.com/get_content.php?id=2010 Huawei ID: 558969357627813 Release Date: ============= 2016-11-18 Vulnerability Laboratory ID (VL-ID): ==================================== 2010 Common Vulnerability Scoring System: ==================================== 7.4 Product & Service 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: http://setuprouter.com/router/huawei/b660/manual-1184.pdf ) Abstract Advisory Information: ============================== The vulnerability laboratory core research team discovered a security flaw that affects the official Huawei Flybox B660 3g/4g router product series. Vulnerability Disclosure Timeline: ================================== 2016-11-18: Public Disclosure (Vulnerability Laboratory) Discovery Status: ================= Published Affected Product(s): ==================== Huawei Product: Flybox - Router (Web-Application) B660 3G/4G Exploitation Technique: ======================= Remote Severity Level: =============== Critical Technical Details & Description: ================================ A remote auth bypass vulnerability has been discovered in the official Huawei Flybox B660 3g/4g router product series. The security vulnerability allows remote attackers to compromise any Huawei Flybox B660 Admin Panel using a new a bypass method. The vulnerability is located in the `./htmlcode/html/` modules and `indexdefault.asp ` file of localhost path URL. Remote attackers are able to compromise any Huawei Flybox B660 admin panel via unauthenticated GET method request. The security risk of the issue is estimated as critical with a cvss count of 7.4. (CVSS 7.4) Exploitation of the web vulnerability requires no privileged account or user interaction. Successful exploitation of the vulnerability results in compromise of the huawei flybox device. Request Method(s): [+] GET Vulnerable Module(s): [+] /htmlcode/html/ Vulnerable File(s): [+] indexdefault.asp Software version of the modem: 1066.12.15.01.200 Hardware version of the modem: WLB3TCLU Name of the device: B660 Hardware version of the router: WL1B660I001 Software version of the router: 1066.11.15.02.110sp01 Proof of Concept (PoC): ======================= The vulnerability can be exploited by remote attackers without privileged user account or user interaction. For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue. After buying a Flybox Huawei B660, the company setup a password for you like: "admin", "12345" or "55555" We figured out that when you lose your password, you can perform to connect multiple times by using the plain passwords above. After the third request the connection will be refused by an exception message, by intercepting the request and passing the error it is possible to bypass the authentication mechanism of the 3g/4g router device. The problem in Flybox Huawei B660 is the following, there is no test if the password false or true. If an attacker tries the false password of many times on requests they redirect you after the bypass of the error to change your password permanently. --- PoC Session Logs [GET] --- GET /htmlcode/html/contentdefault.asp HTTP/1.1 Host: localhost Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8 Accept-Encoding: gzip, deflate, lzma, sdch Accept-Language: en-US,en;q=0.8 Cookie: login_url=settings; CNZZDATA1260483764=1049902387-1478277586-%7C1478277586; Basic=index; Language=en; SessionID_R3=1006428909 Referer: http://localhost/htmlcode/html/content.asp Upgrade-Insecure-Requests: 1 User-Agent: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.59 Safari/537.36 OPR/41.0.2353.46 HTTP/1.1 200 OK CACHE-CONTROL: no-cache Content-Length: 5776 Content-Type: text/html PoC Video: https://www.youtube.com/watch?v=-xzedPTNv6c Solution - Fix & Patch: ======================= N/A Security Risk: ============== The security risk of the remote vulnerability in the Huawei Flybox B660 3G74G router is estimated as critical. (CVSS 7.4) Credits & Authors: ================== SaifAllah benMassaoud - ( http://www.vulnerability-lab.com/show.php?user=SaifAllahbenMassaoud ) Disclaimer & Information: ========================= 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. 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