Title: devolo dLAN 550 duo+ Starter Kit Cross-Site Request Forgery
Advisory ID: ZSL-2019-5507
Type: Remote/Local
Impact: Cross-Site Scripting
Risk: (3/5)
Release Date: 03.02.2019

Summary

Devolo dLAN® 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.

Description

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.

Vendor

devolo AG - https://www.devolo.com

Affected Version

dLAN 500 AV Wireless+ 3.1.0-1 (i386)

Tested On

Linux 2.6.31

Vendor Status

[04.10.2017] Vulnerability discovered.
[11.10.2017] Vendor contacted via email.
[14.10.2017] No response from the vendor.
[15.10.2017] Second attempt - Vendor contacted via email.
[02.02.2019] No response from the vendor.
[03.02.2019] Public security advisory released.

PoC

devolo_csrf.txt

Credits

Vulnerability discovered by Stefan Petrushevski - <stefan@zeroscience.mk>

References

[1] https://www.zeroscience.mk/en/vulnerabilities/ZSL-2019-5508.php
[2] https://www.exploit-db.com/exploits/46324
[3] https://packetstormsecurity.com/files/151526
[4] https://cxsecurity.com/issue/WLB-2019020039
[5] https://exchange.xforce.ibmcloud.com/vulnerabilities/156595

Changelog

[03.02.2019] - Initial release
[10.02.2019] - Added reference [2], [3], [4] and [5]

Contact

Zero Science Lab

Web: http://www.zeroscience.mk
e-mail: lab@zeroscience.mk